ebikes.ca Blog

Busy Month and New Presentation

June 17, 2020 5:40:33 AM PDT

We thought May was a record busy month here but June has even stepped that up a notch! Normally this should be a good news item as we all want ebikes to take off. However, it also means that in spite of careful inventory planning and increased staffing levels earlier this year, we're still having a difficult time keeping up with this activity. We're currently receiving 250-300 emails a day which is more than our capacity to answer, and many items that we thought would be in good supply are fast running out of stock.

We're doing what we can to stay caught up, to bring on more staff, and to expedite stop-gap inventory supplies. And in the meantime, we appreciate your patience as our email response time is slower than usual, and orders are sometimes taking a week or more to ship out as we work through the queue.

We would also like to remind our local customers that we are still committed to contact-less order pick-ups and are not accepting unscheduled visits. Please continue to place your orders online and we will contact you when the order is ready to collect. 

Efficiency Presentation - Sun Jun 21st

In spite of all this busyness, we will still be going ahead with the next installment in our live seminars to spread in-depth knowledge of different aspects of ebike technology. But we will be dropping the frequency of these from every 2 weeks to once a month. The focus of our upcoming presentation will be all about motor and system efficiency, and will start this Sunday at 10am PDT. Tune in if you feel like geeking out! This talk will get a little nerdy. 

A Video by Grin Technologies

Posted By Justin Lemire-Elmore

V3 Phaserunners

May 30, 2020 4:27:34 AM PDT

Our Phaserunner Motor Controllers are back in stock with an updated V3 design that uses the new waterproof WP8 Cycle Analyst plug standard. This brings the Phaserunner into the same connector realm as the Baserunner controllers and simplifies the hookup of motor temperature sensors and handlebar on/off power switches. See our short Phaserunner V3 Updates List for a detailed explanation.

Phaserunner Order Shipments Going Out the Door

Actually, we've been making them like mad for the past couple weeks since the parts came in just trying to keep up with the order volumes during this record breaking busy month of May! By the end of this week we expect to be fully caught up on the back-orders and we thank everyone for their patience if you've had an order in the queue that hasn't shipped yet.

Posted By Justin Lemire-Elmore

Multi-Motor Drive Systems

May 10, 2020 11:26:19 AM PDT

After the great feedback from our SPEZI show presentation on hub motor theory we're pumped to make this into a recurring event. At least once or twice a month until the end of summer we'll do a thorough live-stream seminar on some aspect of ebike technology for those people after a deeper understanding of the topic.

Our next talk is going to be this coming Sunday, May 17th, and we've decided to cover multi-motor drive systems. That could be dual front and rear hub motors, one hub motor and a mid-drive motor, dual front motors on a tadpole trike, dual rear motors on a delta trike, and even 3 wheel drive setups.

A Video by Grin Technologies

We plan to explain when and why you'd consider a multi-motor setup, and then into great detail on the optimal component selectoin and wiring techniques to properly control multiple motors on a single vehicle. If this is an area of interest, check in Sunday at 9am PDT on the video link above and join the stream!

Posted By Justin Lemire-Elmore

Update - Server Migration Complete, Browse Away!

Hey everyone, this Saturday at 5pm Pacific Time our website will be down.
Yes, we know our webpage has gone down a number of times lately; what's different is that this time it is planned in advance! We are migrating to a new server that should result in faster page loads and better browsing experience for all those who come visit ebikes.ca to learn things, play with our tools, or shop for ebike parts.

Faster Website Here We Come!

If all goes well this should last for 1-2 hours and then the site will operate normally again, with the same old look but nice and overdue speed injection. We recommend not being in the process of creating any orders on Saturday afternoon/evening until after the migration has completed, and for some period of time the order page will be locked. All core online orderi functionality seems to be up and running fine.

It is quite possible that there will be additional hiccups or aspects of our web page that end up breaking in this process, but we have a team on hand who will be on the front lines to resolve any issues. We're looking forward to this upgrade and having our next check-in from the other side.

Posted By Justin Lemire-Elmore

Spezi Talks

April 24, 2020 4:17:26 AM PDT

Our original 2020 plans had us in Germany this weekend participating in the one-of-a-kind Spezi bike fair. This event showcases all the outcasts and inventive oddities from the bicycle scene: Cargobikes, velomobiles, recumbents, trikes, ellitpical bikes, folders, handcycles... our kind of folks! We were excited to finally attend after hearing about it for so many years. We were going to share an exhibit booth with our friends at ebikes-solutions, show off some fun demo EV projects, and meet many of our European customers and clients.

That's not happening of course, but in the spirit of keeping the event alive the organizers have created a virtual Spezi page and made to make as much of the planned content available this weekend to anyone who wants.

We were scheduled to deliver two presentations, one on the logistics and experiences of solar bike touring, and another on the practical and theoretical understanding of hub motors. Those events are going ahead!

A Video by Grin Technologies

The upcoming talk about hub motors will be a livestream broadcast on YouTube that starts on Sunday at 7am PST, 10am Eastern Time, or 4pm in the afternoon for those on European time, and we'd love you to join us if this is a topic you want to learn more about.

Posted By Justin Lemire-Elmore

3 Wheels Live Premiere

April 16, 2020 5:50:46 PM PDT

We had plans to show our short Suntrip video at several more film festivals this year, but with all of those gatherings cancelled and many people stuck at home we've decided to do a live streaming release this weekend for everyone to watch.  If you are into ebikes, solar bikes, rowing bikes, or random silly adventures, then tune into our Youtube premiere of "3 Wheels Under the Sun" this Sunday evening at 7pm PST.



A Video by Grin Technologies

If you miss it, you'll miss out on the live chat but at you'll be able to stream it any time therafter no problem.   

Posted By Justin Lemire-Elmore

Grinspector Revisited

April 11, 2020 2:21:00 AM PDT

We hope that everyone out there is making the most of their Easter long weekend given the circumstances! Here at Grin we've still been plowing along with our ebike development projects as much as possible,and are glad to announce some nice updates to our Grinspector Battery test station.

This is a device that we developed initially for our in-house battery testing needs but decided to make it available as a tool for other ebike businesses and custom builders. The recent updates include

  • Native Operation up to 100V (previously was 60V max for charging)
  • Entirely Rewritten Software Suite, now Available for macOS
  • Discharge Test Periodically Measures Pack Internal Resistance

We've been using a bank of these for doing our 100% quality control tests on every single battery pack prior to shipping, and we show this setup and the basic operation in the following video:

A Video by Grin Technologies

While we were at it, we also produced a video tutorial on setting up a Grinspector station and using new software suite. 

A Video by Grin Technologies

Posted By Justin Lemire-Elmore

Grin Operations Update

March 27, 2020 3:26:09 PM PDT

As the situation with COVID-19 unfolds, we are adapting in order to provide high quality ebike conversion components and ebike accessories, while keeping our entire crew safe and employed.

Sales and Support

At the moment our sales and support staff are working exclusively from home and are not at the Grin facility. While we always prefer email communication whenever possible, we have setup a remote system to allow the sales team to call back those of you who are unable to email and leave us a phone message instead.

Local Pickup

Although the storefront is fully closed, our shipping department is still allowing local order pickups for the time being. Local orders need to be placed and paid online first, and then we will notify by email when the package is ready for scheduling an appropriate collection time. This is strictly a package pickup service, we will not have the ability to modify the orders or provide any sales assistance you may be used to. 

RMA Processing

We will continue to do our best at providing all the troubleshooting and warranty support to keep your ebike setups up and running; there is no better way to stay fresh and healthy during this time and the roads have never been less congested. However we cannot process any in-person visits to the shop, and our turn-around time for items that need repair work is currently much longer than normal given the remote work situation. We will address each situation on a case-by-case basis to sort an appropriate resolution given the circumstances.

Posted By Robbie Campbell

Business during Covid-19

March 16, 2020 8:49:00 AM PDT

Needless to say this past week saw a very rapid change in the ground situation for Covid-19 response around the world, and we're in full support of all the preventative measures being taken to reduce the foothold that it gains here.


What we are doing

We are going to try and keep Grin's online business fully operational to continue delivering ebike conversion parts around the world, but many of our staff will be working from home and we will be keeping the number of people at our shop to a minimum. For the time being:

1) No more visit appointments

We will cease doing in-person consultations at our shop. We will only be allowing visits from people who have pre-paid orders that are ready for pickup, and we'll have your items in a box by the front door when you've been notified that the order is ready. Updated to reflect our latest procedures 

2) Reduced Phone Availability

We will try to have one person available for phone support down from our normal 3 lines, which means we ask you to leave that phone line open for those who strictly need it and cannot use email due to vision or technical issues. Otherwise all correspondence (sales questions, technical questions, order updates, troubleshooting/support) will be directed over email.


We thank you for your understanding on these two points and hope that people are doing well and staying healthy. All health concerns aside, for those not affected a short-term pause in all the long distance travel, commuting, and big events may end up being good for the soul and for general perspective. Stay positive, go for bike rides, fix things up around the house, our busy lives can use the occasional reset.

Posted By Justin Lemire-Elmore

A Few Product Delays

March 6, 2020 4:10:03 PM PST

As many people are well aware the spread of Covid19 has disrupted the supply chain of goods originating in China. Fortunately most of our inventory and stock was well secured before this but we have had setbacks in 3 product lines:

1) Phaserunner

The PCB assemblies for the Phaserunner devices are not expected now until the end of this month, and we will not be taking back-orders until those parts are on hand. For many users the newer Baserunner_L10 model is an excellent substitute for those who do not require 72V operation, and we have that in good supply

2) Inexpensive Chargers:

Our inexpensive chargers are back in stock, so this deal is done! (04/13/2020)

Our cheaper 2A and 3A charger models with the ST3 port are entirely out of stock leaving us without a budget charger option to pair with our downtube batteries. Until these are back in stock (eta mid-march), we are offering the Satiator Upgrade on a kit or battery at 50% off the normal price to split the difference. Please note that this discount only applies with a battery or ready-to-roll kit purchase that includes a Satiator, and not on the charger by itself.

Get Satiator instead of Generic Charger for just $150 USD

3) Standard LiGo Batteries:

The assembly of our next batch of LiGo BMS circuitboards got seriously delayed as well, and full production might not be possible until early April. We have a limited supply of LiGo's available for backorder purchase being made from rework of existing inventory, while the new higher power LiGo+ modules are available in good supply.

Posted By Justin Lemire-Elmore

This is a reminder that we are once again attending the BC Bike Show with a full booth showcasing many of our kit and conversion products. If you want an opportunity to talk about retrofit options that would suite your needs and see the systems firsthand then please come by. It's a great event with many players in the local cycling and outdoors scene all under one roof. We're at location B207.

Floor Plan of 2020 BC Bike Show Robbie at Grin's Booth

At the show we'll be giving two presentations on solar bicycle touring and screening the short film of our 2018 Suntrip ride. The premier showing at the Mountain Film Festival was very well received and we're glad to have another opportunity to present this to a public audience, and to answer any questions about solar powered ebikes. Check us out at the Cycle Stage.

  • Saturday Feb 29th at 12:30pm
  • Sunday  March 1st  at 3:00pm
Posted By Justin Lemire-Elmore

Introducing our New Sales Crew

February 26, 2020 12:27:56 PM PST

We are happy to introduce four new people who joined Grin recently to help us out in our sales and customer support department. Bob, Laurel, and Nicole all started at the beginning of the month and have been doing an amazing job learning all the ins and outs of this operation, while our good friend Eliza's been guiding the process since coming on board last fall.

 Say hi to your new front-end crew

This expanded sales team will help us deliver fast response and excellent customer service as this business keeps getting busier and busier, and we appreciate your support and occasional patience as the new staff get fully trained up.

You can see that our front of shop renovations have been moving along as we accommodate this larger team and prepare ourselves for what is sure to be a busy summer. For now however, we will continue to be a by-appointment operation. If you do need to visit Grin in person, please remember to call or email in advance to book a time slot, Tue-Fri 11am - 6pm, instead of showing up unannounced.

Posted By Justin Lemire-Elmore

Grin's 2020 Batteries Update

February 23, 2020 1:58:24 AM PST

Our Grin battery lineup keeps growing and the latest shipment includes high capacity downtube batteries in the new Reention DP-9C 84 cell enclosure. These large packs provide over a kilowatt-hour of capacity in convenient frame mounted casing, ideal for long distance trekkers.

 New Reention Battery Enclosures

We have both a 36V 26.5Ah and a 52V 20Ah model in stock and ready to ship. We've also got a smaller 48V 16.5Ah Reention battery model for smaller range requirements. These 3 new models are all Baserunner compatible for slick conversions and are available with our Ready-to-Roll kit bundles

72V are Shipping

Last year we expanded our 72V pack offerings to include a 9.5Ah model using Panasonic 21700A cell, but they were for local customers only as we lacked the paperwork and certification to ship them. Well that has been sorted out and these 72V downtube battery packs are now available to be delivered around the world. These packs provide a very convenient approach to doing high speed EV builds without the complications of series connecting 36V batteries or dealing with sketchy pack construction.

LiGo+, Higher Power

We're also putting on the final touches for a new LiGo+ battery module that uses the high power Samsung 30Q cells. These new LiGo+ packs can sustain higher continuous discharge currents (15A vs 10A) and charge currents than our standard LiGo, making them ideal for very lightweight EV builds that are running just 2 or 3 of these modules. For large packs (4 or more in parallel) the standard LiGo batteries are still perfectly suited and the most economical, but for more ultra light systems the LiGo+ packs are just the ticket. .

Posted By Justin Lemire-Elmore

VIMFF - Feb 26th

3 Wheels Movie PosterWe're thrilled to report that the Vancouver International Mountain Film Festival (VIMFF) has selected our short film "3 Wheels Under the Sun" for their upcoming show. This tells the full story of our 2018 Suntrip race and will hit the big screens on Feb 26th at the Rio Theater along with presentations from other long distance bike tours . We welcome anyone in Vancouver with an interest in bike adventures to get tickets now. If you're into the outdoors be sure to check out the many other great shows during the 10 day festival.


BC Bike Show - Feb 29th / Mar 1st

We'll also have a screening the following weekend at the BC Bike Show on Feb 29th at 12:30pm, and March 1st at 3pm. This will be a more intimate environment that will allow discussions about the logistics of solar ebike touring and a Q&A session afterwords. If you are interested to hear more details about solar powered ebikes or have some burning questions then please come out. There are plenty of reasons already to check out the BC Bike Show and hopefully this adds one more to your list!

Posted By Justin Lemire-Elmore

Anderson Inventory Motor Clearout

February 8, 2020 12:42:18 AM PST

As we move fully to the L10 motor connector standard for medium to high power kits, we've decided to slash prices on all our remaining motor and controller inventory that use the Powerpole standard. This is your chance to get a great deal on high performance kits at 30-40% off the regular price, and it includes all of our eZee kits and the prelaced Crystalyte UFO kits.

 Clearance Motor Kits with Anderson Plugs

The motor Anderson and JST plugs and standard has served us well for over 10 years, but we're trying to reduce the overlap as our upcoming eZee and Crystalyte orders will all be with the overmolded L1019 connectors.

Posted By Justin Lemire-Elmore

Merry Christmas Grinners

December 25, 2019 4:44:50 PM PST

We hope everyone out there who celebrates is having a great Christmas holiday.

Wishing you all a great Christmas from our staff and a few +1's

It may not be peak ebike riding season but it can sure be prime building season! We're wrapping up several months of serious work behind the scenes at our shop and are glad to announce a few things as the year comes to a close.

RTR Kits

First and foremost, we've expanded our selection of Ready-to-Roll kit bundles based around the new Baserunner controller series. Including many high power hub systems now that we have the Baserunner_L10 in full production which supports 80A peak phase currents. Check the video below.

A Video by Grin Technologies

All Axle Fun

These motors are in full production at our factory/shopWe're also happy that report that our Grin All Axle hub motor is out of the Beta testing phase and in full release with an updated V2 model. We want to thank all those pilot users from the past several years as we worked out all the kinds, and all those single side trike pioneers who helped us develop a series of adapters for so many trike models. (and yeah, it goes without saying that we are working on a rear version next)


Some of the new stuff recently added to our shopThere are more end-of-the-year product treats too. We've got motor options for the 190mm fatbike frames, super secure double and triple bobs coming off our CNC mill for mounting downtube batteries, wheelbarrow and scooter motors for non-ebike conversions, and a few more 72V and 36V battery choices too.


Reading documents

With a wider audience of first timers getting into ebikes as the movement spreads, we also thought it was about time to publish some more entry-level information for people those just getting started.

  1. Don't know the difference between a torque arm and a mosfet? Here is a basic primer on all the components that make up an ebike conversion system.
  2. Not sure what hub motor options would be compatible with your bike build? We've written a thorough compatibility list for all the different styles of bikes and trikes and what does and doesn't work. 
Posted By Justin Lemire-Elmore

Drop-In Store Closed for Renovation

September 9, 2019 6:03:03 AM PDT

Well it's been another huge and busy summer, and now that it's mostly wrapping up we're planning to spend the next several months on some deep reorganization and renovation of our shop space. During this time we will operate in business-as-usual for all our online orders and email tech support. However, the storefront will be closed to casual walk-in visits except by appointment only, and our phone may unresponsive for long stretches of times too.

This is what our last big round of Renovation looked like.

These updates to our facility will allow us to grow and operate more efficiently in the years ahead, and we thank you for your patience during the process. 

For local customers wanting to purchase items, the process will involve placing the order online first and then coming by to pickup the order after you've been notified that the items are ready to collect. 

Posted By Justin Lemire-Elmore

Rear Thru-Axle Motors

September 5, 2019 4:49:00 AM PDT

In our quest to make hub motors keep up with changing frame standards, we've just released a custom version of the Crystalyte 'H' series UFO motor that is compatible with rear thru axle bike frames. We have the rear H3540 and H3525 motors in a 142x12 standard, and a wider H4040 motor available for the 148x12 boost size. 

These motors have an integrated torque arm and we've designed a special CNC machined aluminum frame clamp that provides a versatile means to secure the arm against rotation. They open up electrification options for new bike frames that have adopted the thru-axle hub standard, using the rugged and time proven Crystalyte motor series. 

They are using the L1019 plug standard and are available as part of a complete kit package as well.

Posted By Justin Lemire-Elmore

Electrafest, This Saturday Aug 24th

August 21, 2019 10:07:05 AM PDT

Our final event to attend this summer is the annual VEVA Electrafest show, happening this Saturday from 10am to 6pm at the Vancouver Roundhouse. This show dedicated to all electric vehicles has been going on annually for several decades and is really taking off now that EV's are finally coming of age.

Picture from Electrafest 2017

We'll be there with an outdoors booth and a number of interesting ebike conversions available to test ride, ready to chat and answer any questions. 

Posted By Justin Lemire-Elmore

Cargo Bike Carnival - Sat Aug 10th

August 5, 2019 11:52:48 AM PDT

AnSo and Andina over lions gate bridge on a happy cargo bike adventure.

We're hoping this everyone is out having a wonderful BC day long weekend right now. Next weekend, on Aug 10th, our friends at the Sidesaddle Bike Shop are organizing a small cargo bike festival from 10am - 3pm. This could be a fun meetup for those in the city with cargo bikes to hang out, and a great opportunity for those considering getting one take some test rides and talk with firsthand users about their experiences. We'll be there with some from our own fleet of ebikes optimized both stuff and passenger hauling for people to try, and will be happy to answer any electrification questions that come up.

Posted By Justin Lemire-Elmore

Hiring Season

July 31, 2019 2:39:18 PM PDT

If you've visited our shop this summer you've likely noticed that things can be really really busy. It's a wonderful problem to face and in order to help us maintain our high standards of customer support and product support need more people working at Grin!

We're looking to bring on up to 5 or 6 new recruits in the areas of manufacturing, packing/shipping, accounting/bookeeping, and sales/support. If you are already living in the Vancouver area and see yourself or someone you know fitting in with our culture and mission, please get in touch with us by email. There's a brief description of what we are looking for in the jobs/careers page.

Posted By Justin Lemire-Elmore

Summer Sales

July 29, 2019 9:42:46 AM PDT

We're in the midsts of inventory suffling right now especially as we transition over to the new L1019 connector standard, and that means a lot of savings and discounts with the remaining Anderson inventory:

MXUS Motor Sale

Now that we have the 9C RH212 direct drive motors in full stock, they'll become our new standard budget direct drive hub, and the remaining MXUS cassette motors are all 25% off. Same with our remaining 9C+ front motors.

eZee Kits:

We've also put a 15-18% sale on all the eZee hub motor kits in anticipation of having an L10 connectorized version of these later in the fall, so now is a fantastic time to get one of these venerable high torque geared motor systems at a discount. 


We're also retiring the classic Stokemonkey kit as we move to focus entirely on hub motor drives, and have our remaining inventory at 50% off and more. If you're looking for a real classic drive system for a cargo bike this could be your chance for bargain shopping.


New 21700 Battery Options

New 21700 Downtube Battery CasingPlus, we've recently expanded our downtube battery selection to include batteries based on the Panasonic NCR21700A cells. These are the same cells used in Tesla vehicles that became available at an unusual discount due to US/China trade issues and so we were able to bring them in and have them on sale in one go. There's a 36V 14.5 Ah, 36V 19.5Ah, and 52V 14.5Ah options, with a new enclosure standard that has an on/off switch, mini 3-pin ST charging port, and Baserunner controller compatibility.


Fatbike Rims Too

20", 24" and 26" DHL65 RimsWe also just received a shipment of the DHL65 rims from Weinmann to further support fatbike and large tire ebike conversions. Unlike most fatbike rims that have excessive left-right spoke stagger rendering them difficult to use with hub motor wheelbuilds, the DHL65 has holes drilled near enough to the centerline that even hub motors with narrow flange spacing can be laced successfully. These rims work well for tires ranging from 3" up to 4.5" in width and are stocked in 20" 24" and 26" diameters with both 32 hole and 36 hole drilling options. Available directly from our Rims catalog or as an option on any kit with a custom wheel build. 

Posted By Justin Lemire-Elmore

Grinning with a GMAC

July 13, 2019 4:46:00 AM PDT

Thanks in part to an unexpected article by the ebike champion and educator Micah Toll, we've found found ourselves being flooded with interest in our new GMAC Hub Motor series. Well we're glad to say that after 2 years of development testing and design iterations, the goals we set out to achieve in partnership with MAC motors for have been fully realized. It's time to properly introduce the GMAC motor now in full production:

A Video by Grin Technologies

A powerful regen-capable geared motor, with integrated torque arm, round axle, side cable exit, cassette freehub, and no clutch. Enjoy!

Posted By Justin Lemire-Elmore

Happy Canada Day

July 1, 2019 3:35:41 PM PDT

We hope all of our northern customers have been having a great Canada Day long weekend. If you've gone on an ebike powered camping expedition then send us your celebration pics!

For the next week we have a flat 15.2% discount on all our flagship made-in-Canada items (Phaserunner, Grin All Axle motor, LiGo batteries, dc-dc converters etc). Simply use the coupon code "Canada152" at the checkout.

Just a note to everyone that Justin and Anne-Sophie are now back from a 6-week leave after bringing a little baby girl into this world. Her name Andina was inspired from AnSo's unicycle trip across the Andes, and it's going to be a delight for us to join all the other young families who've been raising a kid from the seat of a cargo bike rather than the backseat of a car.

 She's definitely a keeper

Anyways if there's been a lack of updates on the site that is why, and we want to thank all the staff at Grin who've been keeping things running and flowing during this very busy time of year. More good stuff (videos, new products, web updates, clearance sales) coming soon.

Posted By Justin Lemire-Elmore

Single Sided All-Axle and the Spezi Show

April 20, 2019 12:41:38 AM PDT

A trade show we've been dying to attend one of these days is the Spezi bike show happening next weekend (April 27-28) in Germany. This is where all the oddball, unusual, and otherwise special bikes get showcased, and if anyone's been keen on electrifying wheeled oddities it's us!. 

While we won't be there in person, a number of vehicles will be at the show featuring the new Grin products like the GMAC Hub Motors, RH212 direct drive motors, All Axle hubs, and the Baserunner and Phaserunner_L10 controllers.  If you're lucky enough to attend then check out Booth A.18 and Booth 3.12 for some velomobiles and cargo vehicles running this gear.  

The timing is also great for us to formally announce an updated 2019 version of the Grin All Axle motor suitable for these single side applications, as explained in this new video below.

A Video by Grin Technologies

Posted By Justin Lemire-Elmore

First off we want to apologize for the longer than normal response time and email backlog as much of our team was busy both in the preparation and attendance at the Taipei Cycle Show this past week. We'll be working hard to catch up on that in the coming days and thank your patience and understanding. To all the dealers, vendors, manufacturers, component partners, and general industry friends we met at the show, what a great time and we look forward to exciting pursuits ahead. 

 Grin Booth at 2019 Taipei Cycle ShowStatorade Motor Demo at Booth

GMAC Motors

GMAC locked clutch geared hub motorOne of the items we demonstrated at the show is the new GMAC motor series. This is a powerful clutchless geared hub motor developed over the past 2 years in partnership with MAC motors, using a custom axle with an integrated splined torque arm. Imagine a MAC motor with perfect frame fit for modern bicycles, zero torque transmission on the dropouts, and phenomenal regenerative braking control.

You can learn more about the development and axle testing process on this endless-sphere thread. Our ambition is to make this splined axle design into a new standard that we deploy across our entire higher power motor lines to replace axle flats. If you're as excited as us and want to jump right into ordering, we have the first production shipment on hand available in bare motors and complete kits.


L10 Connector

L1019 Connector with PinoutOne thing you'll notice about this GMAC motor is that we are using the 10 pin waterproof locking motor plug. Over the course of the year we will be switching to this connector standard for all of our medium and high power hub motors, replacing the Anderson and JST-SM's that we had standardized on previously.

Our hope is that this plug will become to motors in the 500-1500 watt power range what the 9pin Z910 became for the low power geared motors, with all motor manufacturers agreeing to the same pinout standard for easy swapping and interchangeability . We have an L10 version of the Phaserunner motor controller available now and will soon be expanding this to a Grinfineon offering as well.


More L10 Motors

There are two additional motors in our lineup already using this locking connector. The first is a new rear cassette motor from Nine Continent, which has better disk rotor clearance and axle alignment than the MXUS hubs. Our first batch of these has sold out but the larger sea order is expected later in April.

The second is an updated variant of our Grin All Axle motor where we've got the cable exiting on the disk side of the motor for single side applications. If you've got a catrike and are looking for powerful dual motor drive like the one here, please give us a shout.

Catrike electrified with dual Grin All Axle Hub MotorsCatrike electrified with dual Grin All Axle Hub Motors

72V Batteries and 21700 Cells

72V Downtube Battery with Samsung 40T 21700 Cells We've also released our first native 72V battery pack in a conventional downtube battery casing, assembled using the high power Samsung 27100 40T cells so that even with the small 8Ah capacity it is able to deliver 40-50A continuous currents. This is an ideal battery for fast and sporty offroad ebike builds, allowing powerful performance without the weight or complexity of most 72V setups (either two 36V packs in series or a large triangle frame battery).

At the moment this battery is in stock but for local pickup orders only as we are going through the certification testing required for shipping. We've been keeping the 21700 cell offerings on our radar as they start to catch up with the performance specs of the more mature 18650 series and this year it looks like they are finally making the grade. Expect more from us as the year goes on. 

Inbound Shipments

Boxes of Crystalyte on Shop FloorOur multiple-delayed Crystalyte sea shipment has also arrived this last week after being held up by customs inspections, and all the Crystalte 'H'motors are back in stock again. A lot of you have been waiting for some time for these and the wait is finally over. 


General Kits Intro

Here is the other presentation from the BC Bike Show earlier this month. It was a basic primer for people to learn about ebike conversion options before we went on to do a live install of a conversion kit. 

A Video by Grin Technologies

Posted By Justin Lemire-Elmore

Show Presentations

March 11, 2019 5:04:15 AM PDT

This is a virtual hello to all the people who came by our booth last weekend at the BC Bike Show and are just now visiting our webpage for the first time. We had a great time and were delighted to see how much this event has grown recently. (And to those who lament that the bike show is now totally taken over by ebikes, well it's been over 15 years now that we've been trying to tell you all this day was coming!)

For those who missed seeing it live, we've also uploaded a youtube video of our live demonstration of a regular bike being converted over to electric assist. We hope that this helps demystify the process for some considering their first kit purchase. It was a fun opportunity as the owner of the bike was at the show and could ride it away the next day.

A Video by Grin Technologies

The video of our earlier presentation on how to navigate various ebike conversion options should be ready to upload later this week.

Kit vs TurnKey ebikeWith so many turn-key ebikes on display at shows like this, it's pretty common for people to ask why would they bother to retrofit a normal bike when they can just buy an electric bike that is ready to roll? It's a fair question and we decided to answer that with an in depth pamphlet that we also made available on our webpage here.

Active Transportation Survey

Unrelated to the show but also of local interest. The BC government is soliciting input on what is meant by "active transportation" which could hopefully help to direct policy and regulation governing not just ebikes but all kinds of human scaled transport. If you think electric skateboards should be on their radar or faster S-Pedalec class ebikes then this is a chance to have your voice heard. Electric bicycles have been an entirely grass roots phenomenon for most of their trajectory and it's encouraging to see the entire scope of personal mobility finally being acknowledged and discussed at this level.



Posted By Justin Lemire-Elmore

BC Bike Show, March 2-3

February 22, 2019 3:26:04 AM PST

The BC Bike Show is the premier cycling and outdoors event in Western Canada and is happening in just 2 weeks on March 2nd and 3rd. We'll be there of course, and in addition to our exhibitor booth we'll also be hosting Cycle Stage to give more public presentations. On Saturday at 11:45 am we'll talk on how to navigate the various motor and battery options available for ebike retrofits, and on Sunday at 2pm we'll be doing a live demonstration of a regular bicycle being converted over to electric assist.

This is an opportunity to get your questions answered and to demystify some of the uncertainty regarding aftermarket and DIY ebike options. 

A Video by Grin Technologies

If you're thinking of coming out to the show to visit us, then let us know as we may be able to help with the tickets too. 

Posted By Justin Lemire-Elmore

CA3.1 Missing Manual

February 4, 2019 7:42:51 AM PST

CA3.1 User ManualIt's been found!  After five years being AWOL the first official V3 Cycle Analyst user manual is now hot off the presses. We're hoping that this document strikes the right balance at explaining the key setup options and features of the latest CA3.1 firmware in a way that's informative but not too deep in every possible technical detail. 

For anyone who has had to struggle finding concise setup information on their CA3 in the past, we're sorry and plan to make amends. One way we'll be doing that is through the continued production of CA3 video tutorials. We've got two released just right now on setting up both basic PAS sensors and also torque sensors with the CA3.1 firmware. 


A Video by Grin Technologies

A Video by Grin Technologies

Posted By Justin Lemire-Elmore

Tribute to Two Local Industry Icons

January 31, 2019 6:12:02 AM PST

While 2018 had its share of excitement and new pursuits for us, it also saw the doors close on two iconic and long serving bicycle businesses here in Vancouver who we think deserve a shout-out. The first of these is Brock Davis of Cambie Cycles who kicked off their final day with a new years party at their vacated premise on Dec 31st. 

Brock (center) in the cleared out cambie cycles shop. After the party and before an epic ping-pong showdown.

Brock had been running his esoteric shop on Cambie St. for over 30 years, pioneering the sale and production of recumbent bikes, tricycles, velomobiles, unicycles, and of course electric bicycles well before any of these things were popular. He was dabbling with early ebike conversions in the 1990's when we were still in grade school and has been for many years one of the few shops always willing to say yes to electric retrofits. We hope to still see him riding around streets of Vancouver in a white velomobile. 

The other shout-out goes to Paul Bogaert who decided to close the Bike Doctor after 27 years and instead cycle tour the world with his wife. Paul had an early role in Vancouver bicycle advocacy and at bringing cycle riding to a less elitist/athletic and more everyday commuter crowd through their shop.  They were among the early shops to embrace family friendly cargo bikes and  appreciated the role that electric would play in making cycling more broadly appealing.

Posted By Justin Lemire-Elmore

New Things for a New Year

January 1, 2019 5:23:00 AM PST

We're hoping that everyone has had great holiday season and are excited as we are for the 2019 year ahead. There are a few things we pulled off in December worth sharing.

Powerful Rear Motor Options

We have added two new direct drive hub motors to our offerings. One is a Thru-Axle version of the Crystalyte Crown TC3080 motor. This is the first 142x12 rear thru-axle motor that's been available for aftermarket conversions and is well suited for modern mountain bikes shooting for 1-3kW power levels.

 New Large Direct Drive Motor OptionsIllustration of Axle Lengths

The other is our first foray into the larger 45mm wide motor series, similar to those sold by MXUS, QS, Leafbike etc. as 3KW or 5kW hubs. We got these made up to properly fit either a standard 135mm dropout with a single speed freewheel, or a 150mm dropout with a 7-8 speed freewheel and some spacers. As expected from Grin they are sealed, include a 10K thermistor for temperature sensing, and have a disk hole injection port for Statorade, and are hubsink compatible. Check out the performance on our simulator both with and without statorade. Unlike so many other direct drive motors, both of these have the proper alignment for disk rotor position and room for disk calipers without shimming things out.

3D CAD Models

We get asked on occasion for 3D models of the hub motors we offer from people doing full CAD mockups of their ebike project. And what better time than Christmas to make this all available to you.

Example of 3D CAD models we've made for various hub motors

The 3D IGS files for most of the motors that we've mechanically modeled are now available in the "additional information" tab on our store site and in a list on our documents page.

CA3.13 Firmware Family

The 3.1 Cycle Analyst firmware has fully solidified with the recent 3.13 release, and in doing this we're also making publicly available a number of customized firmware branches full of special features. These are loosely explained in the CA3 Firmware page, but are worth highlighting here:

  1. Solar Shunt firmware: With this firmware the Cycle Analyst can use the auxilliary input as a second current sensor for measuring and showing the solar amps and watts. You can not only see in realtime how much solar power is coming into the pack, you also get combined statistics such as the %solar recharge and the net wh/km mileage taking into account the solar input for the day. This is the ideal instrument for looking at solar ebike performance, consolodating all measurements in a single device.
  2. GPS Firmware: This net update will be much appreciated by people who have a GPS Analogger device with their CA3. With a simple hardware modification to the Analogger circuit, the GPS data will be transmitted from your existing TRS cable back to the Cycle Analyst. You can then see the time of day, your elevation, position, and direction all on the CA3 screen. The firmware also features additional custom views on the main screen, allowing you to replace or toggle the battery voltage with any of these new parameters to get just the display you are after.
  3. Solar GPS Firmware: Theres even a -SG firmware that combines both the solar current sensor and the GPS code. This firmware produces a log file just like that of our suntrip databox project, and will be invaluable to for those doing performance analysis on solar EV trips.
  4. Fast Log Rate: And to wrap things off, we have a slight version of the standard 3.13 release that includes a much higher 55Hz data logging rate. This has come up when people have wanted to use the Cycle Analyst for looking at rapid transient behavior, from off the line accelleration numbers to current spikes that cause their BMS circuit to trip.

Piloting the Baserunner

Baserunner Controller in Hand

And the last product update to kick off the year is the pilot release of our new Baserunner motor controller. We spent much of last summer and fall trying to cram an even more miniature version of the Phaserunner into compact profile that could fit inside the controller cavity of the popular Hailong downtube battery cradles, and by golly we did it. While not as powerful as the Phaserunner (just 55A max phase current, and 60V max battery voltage), the Baserunner is perfectly suited to the smaller geared and direct drive hub motors using the Higo Z910 plug. This allows for a very tidy installation with no separate controller to mount.

Baserunner with Included Controller HeatsinkBaserunner in Hailong Battery CradleBaserunner with Full Battery

But unlike other battery mounted controllers, the Baserunner also stands on its own too. If you upgrade to a different battery model in the future that doesn't fit the cradle, simply remove the Baserunner from the base and use it as a miniature stand alone controller with your new battery pack. That's Grin thinking about your future options for you.

We are currently producing them in a limited volume for pilot sales to early adopters to purchase either alone or with a G31X kit, and expect to have them in full production in 2-3 months. 

Video Tutorials

The following 5 video tutorials didn't get a formal blog post last month but are worth a watch if you missed them and have a particular interest in taking apart an eZee motor, replacing an OLED screen, tuning a Phaserunner, repairing a blown controller, or converting your CA to an orange backlight.

A Video by Grin Technologies

A Video by Grin Technologies

A Video by Grin Technologies

A Video by Grin Technologies

A Video by Grin Technologies

Posted By Justin Lemire-Elmore

Profiles, Tig Cross and Aaron Brown

December 15, 2018 1:07:16 PM PST

Our December / Christmas treat for all of our fans is going to be LOT of new video releases on our youtube channel, for both enjoyment and education. Our main videographer Aaron Evenoldsen has been on a retreat editing footage from throughout the year and it's all coming together now.

We'll start this off with the latest two Customer Profile videos. In the first one we follow up from the well received Leigh Cross video with a look at his son, Tig Cross. Tig's been refining an original bike concept combining the best parts of an ebike, scooter, and velomobile, and showcases the merits of an electric generator for the human drivertrain.

A Video by Grin Technologies

And for our most recent release we look at the Landyachtz engineer Aaron Brown, who has turned his daily commute from the suburbs from a a soul sucking traffic slog into an offroad adventure.

A Video by Grin Technologies

If only we had a hard core ebike-commuter-of-the-year award to hand out!

Posted By Justin Lemire-Elmore

Leigh Cross Customer Profile

October 18, 2018 1:59:42 AM PDT

With things settling down since the busy summer we're now getting many things back on track again, and that includes our regular customer profile video series. We recently finished one on one of our all time favorite customers, the 89 year old Leigh Cross. 

A Video by Grin Technologies

Posted By Justin Lemire-Elmore

G31X, Our Favorite Little Motors

September 30, 2018 3:38:52 AM PDT

We've been pretty smitten about how well the small G311 front and G310 rear motors have been working out this year. A short video we first filmed back in May explains why!

A Video by Grin Technologies

Based on the enthusiastic response we've had from customers, we're now stocking these motors prelaced into rims rather than just as bare hubs, which means even faster turn-around time for getting a kit. The front G311's are already on hand in 16", 20" 26" and 700c wheels, and we'll expect prebuilt rear wheels later in the year.

We've also just flushed out a fairly detailed product info page on this motor series which you should look at if you want to learn more, and even filmed a detailed disassembly video in case you ever wanted to take one apart!.

A Video by Grin Technologies

Posted By Justin Lemire-Elmore

Additional Torque Sensor Options

September 7, 2018 4:50:20 PM PDT

The torque sensor options at Grin have been getting better and better. We now have a cup adapter for the popular Sempu sensors which extends the flanges out so that they fit bike frames with 73mm bottom bracket shells. For the longest time people with 73mm BB's have been out of luck for aftermarket torque sensors, but no more.

Sempu 73mm BB Adapters

Sempu and NCTE FeaturesIn addition, we have a new lineup of torque sensors from NCTE to replace the long out-of-stock THUN devices. This restores the option for a true transducer that measures the actual spindle torsion. They provide an accurate human watts readout, and unlike other sensors they can be used in mid-drive setups where the motor is driving the right side chain.

To help this DIY mid-drive use case we've brought in stock the extra long 136mm spindle option, providing additional clearance for motors and extra chainrings on the right side.

To learn more about these different sensor types and how to choose the best one for your ebike, have a read of our newly completed Advanced PAS Kit article. It should help demystify things.

And finally, Robbie made a nice video this summer showing the installation process for the Sempu sensors. We hope this provides a clear idea of what is involved in adding one of these torque sensors to your ebike build.

A Video by Grin Technologies

Posted By Justin Lemire-Elmore

What a summer

August 30, 2018 9:26:32 PM PDT

This title says it all. This has been an epic summer and an epic year by any measure. After completing their planned leg of the 2018 Suntrip last month, Justin and Anne-Sophie got married in August with a boat and water themed ceremony, and had the tandem trike safely returned to Vancouver last week.

We've created a single page with all the videos, media links, and a new image gallery from the trip so that you can see access all the info from one place. :

Meanwhile our video editor Aaron has been compiling our varied footage from the trip into short clips. The first day video showing most of the other riders was published a few weeks ago:

A Video by Grin Technologies

And we just completed the 2nd in the series showing highlights from Switzerland through to Serbia:

A Video by Grin Technologies

In the meantime, this has been our busiest summer in the store ever in terms of sales and new product developments. We want to thank Phil and Christoph who both joined the Grin team for the summer months keeping the shop under control and wish them the best in their continued studies.

Posted By Justin Lemire-Elmore

Grin Customer Profile, Mark Havran

July 6, 2018 5:06:21 PM PDT

For our 2nd ever customer profile we're going to feature Mark Havran.


While we're still fairly new to the solar ebike game, Mark is among the (suprisingly numerous) Grin customers who've been thinking about and experimenting with solar bikes for many years. After he shared pictures of his latest project and mentioned his round the world touring ambitions, we thought we had to do a small feature on this guy. A quick last minute trip to Maker Faire was arranged to meet up, and here we present, Mark Havran:

A Video by Grin Technologies

For additional technical details and insights on his build and plans, have a read of his recently started endless-sphere thread

You can also follow Mark's adventures via Instagram at @SolarEbike.

Posted By Justin Lemire-Elmore

After quite a long testing and verification period we're finally ready to release our 3.11 firmware update for the CA3! It is highly recommended to update your CA3 to this software, especially if you're on 3.1, for some important bug fixes and much improved PAS response.

You can grab the latest firmware using the CA software utility by clicking the  "Get New Firmware" button - happy flashing!

Firmware Update Please

We are also happy to let everyone know that the Crystalyte motor shipment has finally arrived after some delays at the port!. As you can see, we're very excited to have these back in stock to help you all out with your projects.

Crystalyte Shipment! 

Included in this shipment are the much awaited 3540 motors with their slick "UFO" design. These are the replacements for the older square style "H" motors, you may have noticed that this change was implemented last year with the 3525 front and rear motors. As always, we have the motors customized with a 10K NTC thermistor for thermal rollback using the CA3.

UFO H3540 


We also have restocked the classic Stokemonkey direct-drive motor, and Brompton NSM and SAW20 motors.

Posted By Robbie

Suntrip Update

June 25, 2018 2:51:37 PM PDT

We're about 65km out of Zagreb in Croatia now, cloudy weather, stopped for a brief rest on the side of the road... JLE

You can follow Justin's most recent updates on the Endless-Sphere forums - here's his latest post. If you're curious how this whole tandem-solar-pedal-rowing-trike came about, you can start reading at the beginning, here!

Justin and Anne-Sophie have been on the road in Europe for about a week now, catching as much sun as they can on the Suntrip. Since the start of the trip in Lyon and the official start of the race in Chamonix, they have been trending on a more southerly route towards Turkey and Iran. As they get used to the style of travel and the nuances of riding a three-wheeled solar vehicle all day they have had their ups...

Solar Charging after Camping

and downs...

Tipped over trike 

That said, I think their level of stoke so far can be summarized by Justin in this picture...

Exhaustion with a Grin.

Totally destroyed!

Find some lovely photo updates via Instagram when Justin and An'so have WiFi: Grin Tech SunTrip Instagram

The official Suntrip website can be accessed here: https://www.thesuntrip.com/

Happy riding and sunny weather to you both!

Posted By Robbie

Rowing Bikes and the Suntrip, VLog on YouTube

May 14, 2018 3:48:14 AM PDT

The clock is fast approaching with just 3 weeks left before Justin and Anne-Sophie head to France for the Suntrip solar ebike race. We've recently made great progress in adapting a craigslist trike purchase into the back-to-back-tandem-solar-electric-rowbike of our dreams. What started off as this:

A Video by Grin Technologies

Is now looking more like this!

A Video by Grin Technologies

Actually, that's from last weekend. The current iteration has a solar roof installed with electric power and turned plenty of heads on it's maiden solar powered trip to the town of Gibsons and back.

If you want to see all the latest build updates, design challenges, and test rides, then now would be a great time to check out our Youtube channel. We've been doing regular VLog posts in preparation for this trip and will be releasing several videos a week during the upcoming crunch.

And while we are talking about videos and rowing bikes, we wanted to share the conversion project from this winter that partly solidified our decision to do the Suntrip tour with a rowing bike component in the first place.

A Video by Grin Technologies

If you've got a rowing bike of any kind that you've been looking to electrify, we'd love to hear from you too to see if the new rowbike mode PAS feature in the CA3.1 would fit the application. 

Posted By Justin Lemire-Elmore

Customer Profiles, could you be next?

May 4, 2018 1:36:26 PM PDT

One of our favorite aspects of this business is the numerous amazing and creative people that we get to interact with on a daily basis. Ebike technology has a way of attracting people from all walks of life who see an opportunity to solve problems around mobility and transport, often in ways we would have never imagined.

We have a goal this year to release a monthly video profile on someone with a story to tell. That includes those whose lives has been dramatically affected in some way by ebikes, fellow entrepreneurs pursuing ideas that can positively impact the lives of others, and also those who just relish in their own DIY ebike builds.

We are kicking off this series with a quick look at Keith Forbes. Keith showed up unannounced at our shop a year and a half ago, asking if there may be any work opportunities as he was considering a move to Vancouver from Trinidad and had something of a personal interest in transportation technology. We'll let the video show what he's been up to since then!


A Video by Grin Technologies

If you want to stay tuned in to updates like this, now would probably be a good time to subscribe to our youtube channel  We have dozens of videos in our editing pipeline that you won't want to miss. 

Posted By Justin Lemire-Elmore

In the last month we introduced two new geared motor options in our lineup.

G60 Fatbike Motor PictureThe first of these is the Bafang G60 fatbike motor. It's got a 175mm axle that can fit fatbikes with up to 190mm dropouts using spacers, it uses a cassette freehub for broadest gear compatibility, and it has an impressive power and torque output that approaches the eZee hub motors.

We've got this hub fully modeled on our simulator and available to purchase as either a bare hub or part of a full kit. Combined with the 140mm Sempu torque sensor it's now possible to do proportional torque assist electric fatbike conversion.


Front G311 MotorThe other motor is the G311, a front equivalent to the wonderfully silent G310 rear motors we introduced late last year. This motor will be replacing the G01 hub for our front mini geared kits. It's a tad lighter (2.3kg), much quieter (spiral gears!), but still has the features from the G01 that we loved. That means a side cable exit, ISO disk rotor compatibility, and 10mm round axle.

We have a limited quantity of these new hubs stocked in 3 different winding speeds, from 8.4 to 12 rpm/V for various wheel sizes, and have a large sea shipment due to arrive in early June.

Our remaining fast and standard wind G01 motors are now on sale too.

Posted By Justin Lemire-Elmore

2018 Statorade Bump

March 30, 2018 2:08:49 PM PDT

The last 8 months we've been wrapping up some long duration testing of Statorade across different hub motor lines and performing experiments confirming its long term stability. These results have us pumped to introduce this motor cooling solution beyond DIY'ers and into wider markets. As an example, have a look at the video we below showing the effect this has on a small direct drive folding bike motor.

A Video by Grin Technologies

This was filmed last summer when we had a customer requesting a 72V SAW20 Brompton electric conversion. Normally that would be a recipe for motor overheating problems, but as you can see, Statorade is the magic bullet that makes it work.

We've updated our Statorade page to include all the latest test info, and also publicly posted on the forums results on the longevity testing, performance with skateboard hubs, characterization of fill quantity vs RPM, and even wrote a detailed study on the potential benefits of Statorade use in BionX motors.

Hubsinks Installed on Powerful EbikeFor people wanting to push the effects of Statorade to the max, the Australian made Hubsinks can clamp on to your motor shell and provide additional cooling fins to shed heat to ambient air. These fit our new MXUS Cassette motors, and the 9C, Crystalyte H, and many others. These are listed on our new store category for motor cooling mods. And like other small products, we try to  keep a stock of 10mL Statorade syringes on Amazon for easy shipping to US customers. They are sold out now but another shipment is inbound. 

Posted By Justin Lemire-Elmore

Email Back Up

March 21, 2018 11:07:14 AM PDT

Update: Our email was fully restored by 4:30pm in the afternoon. If you sent us an email that bounced during this time period, please send it again and we should receive it fine this time. 


At the moment our ebikes.ca email accounts are down as we have been pushing through a set of security updates to our server and hit some glitches. We are working hard to resolve this as soon as possible. For anything urgent please reach us by phone.

1-(604) 569-0902

Our web-store, shipping, and operations are still all up and running and there should be no order delays as a result of this, but if you have comments or additions for an order in progress it would be best to communicate that over the landline.  Sorry for any inconveniences. 

Posted By Justin Lemire-Elmore

This coming Thursday we are hosting an evening workshop that covers a high level introduction to the various ebike conversion packages offered by Grin, aimed specifically at bike mechanics and others in the local bicycle industry who want to understand what is available for open standard conversion systems. If you are currently working in the bicycle scene and are interested in participating, please contact us by email with some background information to reserve a spot.

Location: #205-950 Powell St (upper lot)

Date: Thursday March 22nd

Time: 6:30 - 9pm

Posted By Justin Lemire-Elmore

Return to Vancouver Bike Show, March 3-4

February 28, 2018 5:15:02 AM PST

This one is for the locals. We will once again have a booth at the Vancouver Bike Show this weekend at the Vancouver Convention Center.  If you've been wanting to come by our shop but can't make it during the week, then this could be a good opportunity to visit and chat about suitable ebike conversion options.  

Our staff are hard at work this week preparing display fixtures so that we can have all the various motors, batteries, and other items on hand at the show. 


Saturday Update: What a great first day at the show and a big hello to the many people who visited our booth and are checking out our website for the first time. The event is on again all day tomorrow (Sunday) until 5pm if you are in vancouver and want to drop by and discuss in person any conversion questions. 

Grin Booth at 2018 Vancouver Bike Show Explaining details and options from the booth

Posted By Justin Lemire-Elmore

Additional Torque and PAS Sensors

February 26, 2018 3:58:43 AM PST

We're happy to have recently added two new pedal sensor options to our catalog.

24 Pole MiniPAS

PAS mini sensor IIThe first is the miniPAS sensor from King Meter which we had modified for plug and play compatibility with the V3 Cycle Analyst. This PAS device has both the disk and sensor tightly integrated into a low profile package that slides over the bottom bracket spindle. The result is a clean install without any of the alignment concerns that are present with separate magnet rings and sensor pickups.

And the best part is that it has a full 24 poles per revolution, providing an immediate response the moment you start pedaling. We've now outfitted most of our staff ebikes with this mini sensor, a V3.1 Cycle Analyst, and digital aux for pedal assist control. The combination is fantastic.


Sempu T2.3 Torque Sensing BBThe second addition is a new torque sensor from Sempu. We had sampled Sempu sensors several years ago but ran into reliability issues. However, the latest 3rd generation T2.3 product seems much more robust. It installs as easily as a THUN device, senses force from both left and right pedals, and like the new miniPAS sensor it also has 24 PAS poles for immediate pedal response.

These sensors are available in square taper 115mm, 122.5mm and 127.5mm spindle lengths for 68mm bottom bracket shells, and even in a a fatbike version for 84mm bottom brackets. Our initial sample order of these sensors sold out fast but we expect our full shipment by the middle of march.

New PAS Info Page

And are you confused about all the options of PAS sensors and Torque sensors and whether you need or want them in the first place? Have a look at the new PAS learning section on our web page that explains in some detail the pros and cons of different pedalec sensor options and control strategies. We hope this serves as a useful reference for those wanting to learn more about pedal assist.

Posted By Justin Lemire-Elmore

CA3.1 Firmware and Software Release

January 31, 2018 7:08:01 PM PST

The V3.1 Cycle Analyst firmware that went through various Beta releases last year is getting so ready for prime time. In addition to the digital aux input buttons, factory resets, enhanced ebrake and regen features, and display screen customizations, there have been other updates including:

  • Additional PAS modes, supporting cadence control so that you can have the PAS output power or throttle voltages vary with your pedal cadence. There is even a PAS mode for electric assist rowbikes with reciprocating PAS sensors. 
  • The ability to automatically return to the main display after a given time and have the Aux change pop-up display just in the custom views tab.
  • An increase in the output data logging frequency to 10Hz for even better dynamic analysis of vehicle performance
  • Pre-loaded settings for all the common torque sensors offered by Grin.
  • Ability to copy all settings one set of presets from another.
  • A switch to watt-hours rather than amp-hours as the primary battery lifetime usage, for a more universal comparison of total energy expenditure.

The companion software setup utility has also gone through numerous improvements with the 1.53 release. You can now upgrade your CA from a 3.0 to 3.1 firmware and it will preserve almost all of your settings and usage statistics, so there's no need to record and re-enter all your values. There are detailed tooltips over each of the parameters to help you understand their functions, and a comprehensive help menu as well. And to top it off, there is now a single button you can click to fetch the latest firmware from our servers, making any future update process seamless as well.

CA Setup Utility 1.53 Improvements

The most recent firmware build is CA3.1Beta21, and well be giving it 1 week of wider beta testing before we make this the final release CA3.10 version. If you are keen to try this and upgrade from a CA3.0 device but don't have the necessary cables, we have both the USB->TTL programming cable as well as the handy up-down digi-aux buttons available from Amazon.com for easy US shipping.

We'd like once again to thank endless-sphere user Teklektik for his tireless efforts at instilling structure and discipline in the Cycle Analyst development and getting the firmware to deliver on our original vision, and to our software team and co-op students who produced the matching CA Setup Utility suite.

Next up on the CA3 front: Android app support, updated documentation, and more video tutorials!

Posted By Justin Lemire-Elmore

Sunny Trips for 2018

January 6, 2018 10:29:54 PM PST

We're pretty excited about what 2018 has in store for the ebike space, and one of the events this year that has us most pumped is the 2018 Sun Trip solar ebike challenge.

2018 Sun Trip Route

For those of you who haven't seen it yet, the Sun Trip is an annual competition run by some (obviously crazy) Frenchmen that challenges people to tour ebikes across great distances, with solar power as their only allowable charging source. It started off in 2013 with a 7500km ride from France to Kazakhstan, and has run most years since then with with trips of varying length and upwards of 30-40 participants. What makes 2018 ride special is that it will be the the most epic challenge yet, covering a full 12,000 km from Lyon, France, to Canton, China.

A Video by Grin Technologies

We've helped out many teams build solar ebike vehicles for Sun Trips in the past and have always had great admiration for this event from across the water. But now it time to join in the fray!

Justin riding shotgun with Guillaume of Declic-Eco, one of the technical event organizers

2018 marks the 10 year anniversary of Justin's first cross-Canada ebike tour and he's itching for another adventure, and what could better fit the bill. Grin will be participating in this amazing ride, both as a competitor on the ground and as a formal sponsor helping with their technical logging requirements. Many of the announcements and product roll-outs you see in the coming months will relate in some way to this Sun Trip. 

And if you're just reading about it for the first time now thinking wow, I'd love to do that, the event registration formally closed in December. However, the organizers are keen to see more participation from North America, so if you have the right kind of aptitude and attitude to pull off building and riding a solar ebike on a 12000km trip like this, send the Sun Trip people your plea, they'll maybe make an exception :-).

In any case, a happy start of 2018 to everyone.

Posted By Justin Lemire-Elmore

Free Hubs!

December 20, 2017 12:18:00 PM PST

More good Holiday news, not quite in the form of "free" hubs but cassette freehubs at least. We've now got two new rear motor options available that shed the threaded freewheel for a cassette freehub system, allowing you to take full advantage of modern drivechain components and the increasingly common 9, 10, and 11 speed gearsets.

The first of these is the tiny Bafang G310 geared motor. This is a small lower power hub like the G01 but with an impressive 11:1 internal gear reduction giving an even better torque to weight ratio. And best of all it uses a spiral sun gear that makes an almost completely silent and silky smooth motor when paired with our sinewave Grinfineon controller. Other features include a side cable exit, easy disassembly for service, integral anti-rotation washers, and excellent waterproofing.

Bafang G310 Motor Spread

The second freehub motor is a rear direct drive hub from MXUS. This one has a 30mm wide stator, so slighly more powerful than the 9C+ and a bit less powerful than the Crysatlyte 'H'. It has the same Grin customizations that you'd expect, with side axle cable exit, 0.35mm laminations for low rolling drag, internal temperature sensor, and fully sealed side plates with a statorade injection port.

MXUS 300X Rear Cassette Motor

Both motors are available in fast and standard winding speeds, fit inside standard 135mm dropout spacings, have disk brake compatibility, and are fully modeled on our simulator (See the G310's and MX3005/6). The MXUS motor also been thermally modeled with Statorade and Hubsinks options too. 

We've got a limited number of each motor on hand now and we expect our large sea freight orders to be here in mid-January once these sell out.

Posted By Justin Lemire-Elmore

Year End Clearance, 40% off Cargo Ebikes and 9C+ Hubs

December 17, 2017 11:21:45 PM PST

It's end of year housecleaning time, and this can mean some excellent holiday savings for you!

40% on Cargo BikesCargo Ebike Sale:

We gave a solid go at offering turn-key cargo ebikes from our new Powell St. shop space this past year, but in the end came to the realization that our resources are best kept focus on conversion kits and the development of new Grin products. So we wrapping that up and clearing out our remaining inventory of eZee Expedir cargo ebikes at a stunning 40% discount.

These ebikes were a good value at their normal price, with a large capacity 19Ah battery pack, high torque eZee motor drive, Magura hydraulic brakes, and other high-end components, and with the additional 40% off they are a steal. It's like buying a kit and getting the bike for free. We've got limited numbers left in red, green, and black colours in time to fit under the Christmas tree. If you've been on the fence about getting a cargo ebike for you or your family, this could be an opportunity not to miss.

Direct Drive Motors Too

We're also clearing out all of our remaining 9C+ 2706 and 2705 rear motors at a 40% discount to make room for new motor series that uses cassette freehubs rather than screw-on freewheels. These have the same low-drag 0.35mm laminations and statorade compatibility that you expect from Grin's offering, but as with all the nine continent motors the construction quality is very much "made for China" grade. They're great value if you want an awesome motor performance but aren't fussy about fitment details.

Posted By Justin Lemire-Elmore

New Articles

December 9, 2017 4:46:23 AM PST

There are a number of information pages that we were working on this year but only now with the relative calm of the winter season have we had the time to wrap them up. So for your fireside reading pleasure, we offer you

  1. ConnectorsGrin's Ebike Connector Guide:  A summary of the various standard connector types encountered in ebike conversions and our take on them from the DIY user perspective. For those dizzied by the wide assortment of connectors out there hopefully this page can help you make sense of some of it.
  3. Mid-drive vs Hub motorOur take on the Merits of Hub Motors: In our travels this summer to meet with other ebike businesses, one recurring theme was that most of them felt hub motors have been subject to a lot of misleading marketing in recent years by mid-drive companies. We've played with many mid-drives as well since our founding days, and while they have a few advantages in some situations our feeling has always been that hub motors are a better overall solution for the needs of 80-90% of ebike users. Even with the popular proliferation of BBSXX type drives, that viewpoint hasn't changed at all. To see why, read here.
  5. Cooked motorHow many watts is that motor?: This is a question that makes Justin's blood boil a little. If there is one thing that is most often misunderstood about ebike technology it's the topic of motor power ratings. Did you know that the european Bosch ebikes will draw 700-800 watts of power form the battery even though they are, you know, supposedly 250 watt systems? It's true. We've always avoided giving specific power ratings on our motors because the number you choose is rather arbitrary, and this more technical article explains why. 
  7. PatentsFrom the past: We also found the draft documents from an old article we wrote in 2010 on the role of the DIY ebike scene at that point, and we thought would be nice to dust off and make available online again.
Posted By Justin Lemire-Elmore

Bits and Bobs

November 17, 2017 5:14:29 PM PST

We've got two new Grin items hot off our milling machine that should help overcome difficulties in electric conversions.

The Handle Bob

The first idea actually comes courtesy of our customer Bob. Bob you see has a Grin All-Axle bike conversion and ran into the familiar situation of having handlebars that didn't lend themselves to sliding on a throttle. This happens all the time with curved drop bars, oversized handlebar tubing and whatnot. His solution with a piece of 22mm OD tube cut and drilled to secure at right angles with a pair of cable ties was so elegant and simple that we had to make this into a product.

 Bob's Original Bar Solution

So in his honor we introduce the Handle Bob, allowing you to easily attach a small bobbin to handebars on which you can affix a thumb throttle, CA aux input, headlight button or other small device without needing to remove your grips or anything else. It's the simplest and lowest tech product that we've ever manufactured in our little machine shop, but one that just might have a big impact for many builds.

HandleBob Pair HandleBob with Digi Aux Buttons HandleBob with Lever Throttle


The Bottle Bob

BottleBob on Tube BottleBobs and HoseclampsThe 2nd item helps when installing downtube and waterbottle batteries on bike frames that don't have properly located waterbottle braze-ons. We're calling these our Bottle Bobs, and they let you add a solid M5 threaded attachment point anywhere on your bike tubing with the security of a stainless steel hoseclamp.


In fact, these attachments are stronger and more secure than many of the riv-nut frame eyelets which can occasionally tear out of the frame tubing with heavy batteries, and allow you the security of having 3 or 4 attachment points to the battery base plate rather than just the 2 when you use the frame's bottle mounts.

Hailong Battery Installed on Bike Frame with No Eyelets

And of course, you can also use them to attach more waterbottle cages to your bike!

Both the Handle Bobs and Bottle Bobs are already available from our store, manufactured at Grin from machined aluminum and black anodized for a lasting sharp look.

Posted By Justin Lemire-Elmore

Who wants a high wheeler?

November 7, 2017 2:53:19 AM PST

At the VEVA electric vehicle show this summer we showed up with two electrified penny farthing bicycles, thinking that we could stage electric high-wheeler races around the mini test track. The racing didn't happen but the fun of riding these around Vancouver hasn't abated. There haven't been too many accidents and the reaction on the streets is pretty amazing if you like making people crack a smile. Aaron and some of the new staff at Grin made a nice video from an afternoon spin:

A Video by Grin Technologies

More specific details on how these were built are shown on the endless-sphere build thread: https://endless-sphere.com/forums/viewtopic.php?p=1309060#p1309060

Anyways it turns out that there are a couple dozen more replica high wheel bikes from this source in a storage locker looking for a home, and we wonder if there is a case to sell them electrified with small hubs in the rear wheel. The bikes are available in wheel sizes ranging from 36" to 54", and they have a custom machined freewheeling front hub so you can coast without pedaling. If owning a piece of 19th century bike technology merged with 21st century electronics like this tickles your fancy, then send us an email and we'll see if there's enough interest to convert a batch! Price would depend on the specific conversion options but can expected between $1500-$2000.

Posted By Justin Lemire-Elmore

It's high time to formally introduce our Battery Grinspector, a device that converts a Version 2 Cycle Analyst into a full computer controlled battery test station. Here is a nice video that Bruno made while we had a prototype to show at the Taipei Cycle Show earlier this year:

A Video by Grin Technologies

This is our first foray into products aimed at shops and businesses that have to maintain and service electric bicycles rather than to ebike end users. As more and more ebike shops open up, there's an increasing need for ebike specific diagnostic and repair tools. We hope it finds a small but growing audience!

A little background

Over the years we've built all kinds of custom battery discharge testing rigs for the troubleshooting, QC, and R&D needs of our operation. But each has been very much a one-off project, rather than something designed with the idea that we could manufacture it as a product. The one on the left is Justin's very first battery charge/discharge machine built for conditioning and testing salvaged NiMH batteries for his first ebike project at university, while on the right was a comprehensive labview controlled solution that would cycle test 8 packs at a time.

Early battery tester for cycle testing and conditioning salvaged NiMH packs Example of test plots showing cell reversals An early ~2006 battery tester we made for a local ebike shop Voltage EV A later revision that with an active programmable load for automatic cycle testing at different currents This 8 at a time labview DAQ controlled tester we made in 2007 and it served us nearly 10 years, performing 10's of thousands of battery discharges in the process  Closeup of our 8-pack custom made test station, retired at last earlier this year

Commercial equipment available on the market for testing batteries tends to be bulky and expensive, made for laboratory or industrial use and wholly out of place in a bike shop. As a result, we noticed many of our dealers have setup simple improvised rigs using a Cycle Analyst and load resistor to do a simple battery capacity test.

Battery Grinspector Basic Layout

The Grinspector station builds on this concept, allowing allowing shops to use their familiar Cycle Analyst while a computer is able to control the charging and discharging of the battery, with real time discharge graphs as well as a final printable QC report. Everytime someone purchases a battery from us, they get a printout of the battery discharge curve showing actual capacity and other test data. That's our own bank of Grinspectors at work, and we hope to empower other shops to do the same.

Posted By Justin Lemire-Elmore

Fall Web Enhancements

October 5, 2017 10:24:31 AM PDT

add custom spokes to cart

Over the last few months we've quietly slipped a number of other small improvements to our website. For instance, from the spoke calculator page you can now directly add spokes to your cart from the calculator, no need to write down lengths and navigate back to the online store.


Launch simulator from kits page

Similarly, when you are shopping for the conversion kits, the simulator link on the bottom will launch the motor simulator page with the correct motor, controller, wheel size etc. already pre-selected.

And if you have individual motors, controllers, batteries etc. in your shopping cart, then you can launch a local instance of the simulator tool from inside the cart to see exactly the performance of these items and how they work together.

Inline Shopping Cart Simulation

Additional Simulator Updates

The simulator improvements have only kept continuing since the September update. There's now the ability to model custom motors, to set a controller for a torque or amps throttle, and to have the throttle automatically adjust itself based on where you click the graph. Read the updated FAQ section and have fun.

Much of this work and the associated tools for motor thermal analysis was possible with the help of our summer software coop students from SFU and UBC; Stefan, Gary, and Adam. It's long overdue we gave them a big public thanks for their fine contributions.

Gary, Stefan, and Adam


Posted By Justin Lemire-Elmore

Motor Simulator, 2017 Updates

September 2, 2017 9:12:00 AM PDT

Hope that everyone is having a great labour day long weekend. This past month we've wrapped up signficicant batch of upgrades and new features to our online hub motor simulator. This list includes

List of new 2017 features on ebikes.ca motor simulator



Posted By Justin Lemire-Elmore

Thinner Throttles and Beefier Ebrakes

August 4, 2017 11:30:00 PM PDT

One of the common sources of fitting issues with conversion kits is interference between the throttle and existing lever shifters on the bike. We have two new throttle options that help things on this front. The T-Lever throttle fits equally well on both the left and right side of the handlebar for maximum install flexibility and is ~2mm smaller in diameter than our previous thumb throttles. And the T-HTwist_Slim throttle is a split grip throttle with an impressive 36 mm max diameter (vs 45-50mm with other common models), allowing it to replace almost any right side grip without concern for shift lever interference. It has a standard handlebar grip diameter right to the end. 

Comparison picture of new throttle options


Beefier Ebrake Lever OptionWe've similarly upgraded our basic mechanical ebrake option to a sturdier model with a longer black lever arm and rubber grip in the front. Both this and our previous silver model are all metal construction, but the new black one is better suited to the quality standards that we'd like associated with our offerings. Our remaining stock of the previous model of ebrakes and throttles are available for sale on our new sale/clearance page.

Posted By Justin Lemire-Elmore

Controllers and Motors with Waterproof Z910 plugs

August 1, 2017 12:07:42 AM PDT

We've spent 10 years of determined effort keeping all of our kits, controllers, and motors interchangeable and standardized around the same 3-pin Anderson and 5-pin JST hall connectors, but we're moving on! At this point, most manfufacturers of small ebike motors have adopted the overmolded 9-pin Higo Z910A plug as a default connector type, and rather than always cutting this off and replacing with andersons we've decided to roll with it and make our smaller 20A Grinfineon Controllers directly compatible.

Higo Z910 Plug

The extra 6th signal wire is used in geared motor setups for an internal wheel speed sensor that is present in many geared hubs, allowing you to get vehicle speed info from a simple CA-DP device rather than needing a separate speedometer sensor and spoke magnet with the CA-DPS. In our small direct drive motors, we've used this 6th wire for the internal motor temperature sensor that is brought out of the controller assembly, so that you can still take advantage of the CA3's temperature sensing and thermal rollback, all with just a single connector and wire to the motor.

Higo 9 pin Motor Plug Pinout

There are downsides to an overmolded plug. You can't measure hall sensor voltages for troubleshooting when it is plugged in, swap phase wires around, or separate the halls from the phase wires to run it sensorless. And replacing damaged connectors is not easy. But for low to medium power ebikes the benefits of this clean single plug are worth it. We have all of our Bafang G01 and Brompton SAW20 motor kits in stock now using this Z910A plug style. And in unusual form, we even finished the user manuals in time for this announcement too. 

20A Grinfineon Manual with Thermistor Pass-Thru  Manual for 20A Grinfineon Controller for Geared Motors with Speed Sensor

Posted By Justin Lemire-Elmore

Just before tipping!Well we managed to have the most crashes in one ride during the cargo bike championships last friday; tip for future events, 2 wheels is better than 3 for fast cornering! Anyways this coming weekend is also packed with with activity, and that includes Grin having a booth both at the inaugural Main Street Bike Expo on Saturday June 10th, and also both Saturday and Sunday at the Vancouver Mini Maker Faire.

At the main street bike expo we'll have a good sampling of converted cargo ebikes, converted Bike Friday and Brompton folders, and some more typical converted commuters on display as well. If you want to learn about retrofits firsthand from us and also check out many other players in the local Vancouver cycling scene all under one roof then this is an event not to miss. It is happeng at the Ellis building on Main St. from 11am - 6pm.

Maker Faire PosterMain Street Bike Expo Poster

Secondly, as is traditional for our Maker Faire presence we've built yet another version of our weight sensing electric longboard. This one is very close to hitting all the marks for an electric skateboard conversion kit using our hands free lean control, including suspension trucks and a ruggedized miniature deck mounted CA. If you want a taste ride on this board in an event full of other creative DIY projects then get your Maker Faire tickets now.

Board BuildingRugged mini CA3 EnclosurePotted dual FOC motor controllers

Posted By Justin Lemire-Elmore

After missing the beat last year we're back to being involved with now the 3rd annual Vancouver Cargo Bike championship this Friday. It's happening once again at the end of Bike to Work Week at Creekside park, only this year there's a dedicated track so less dodging of pedestrians around the seawall bike path.

It's not too late to register and we'll be sponsoring a prize of a $150 (or 15% off an order) gift certificate for anything at Grin to a winner in the e-cargo category. We hope to see many of our customers there and if you've been considering a cargo ebike yourself this would be a great event to check out. We'll be racing our legendary Frankentrike and as always we have a fondness for the homemade and wacky.

Cargo Bike Championship Race MapCargo PosterOur Original Frankentrike, with a 700lb load of drywall scraps. The cargo haul during the race will be a little more forgiving.

Posted By Justin Lemire-Elmore

Hydraulic Stopping Power in your Hands

May 27, 2017 5:12:12 PM PDT

Magura MT4e BrakesWe've been able to add the powerful Magura MT4e hydraulic brake system to our offering of ebike kit accessories. This provides amazing hydraulic stopping power when you need it, with a built-in switch on the lever arm to activate regen or controller cutout.

If you already have hydraulic brakes then the TripWire is a great way to add electric cutoffs to your existing levers. But for those looking to upgrade their ebike from mechanical brakes to hydraulic or building up a new conversion from scratch, these Magura's are among the best.

The brake levers are a symmetric flip-flop design so the same lever works equally well on the left or right handlebar, and come fully bled with 2200mm long hoses. Magura has designed them so that you can then cut the hose to length without the complicated bleeding step if you follow their instructions (See Video Here). The hardware for cutting the hose to length is included with each kit.

Magura Brake Connector Options

We've got them stocked with 180mm disk rotors and various frame caliper adapters to fit this rotor size. For the electrical termination you can choose between a 15cm cable with 2-pin HiGo plug or a longer cable with JST-SM connectors for setups running a V3 Cycle Analyst.

Magura Brake Adapters

Posted By Justin Lemire-Elmore

Ebike parts tend to be lag the standards used in the modern bike industry by several years but we do our best to move things forwards. Recently the 650b aka 27.5" wheel size has largely replaced 26" as the standard for new mountain bikes, but hub motors in 650b rims have been nearly impossible to find. 

650b Rim Size Compared650b Rim Options in Hub Motor BuildsExample of 650b eZee Kit Motor

We've addressed this and now have our front and rear eZee kits available in a prebuilt 27.5" option with a Schwalbe Big Ben tire. We also have stock of both Alex DM24 and and Velocity Cliffhanger rims. We can now offer a 27.5" size for the 9C+ kits, Bafang G01 kits, TDCM IGH kits, and other custom wheel builds. This addition will ensure that Grin has a drop-in hub motor option for all the newer bikes out there.

Posted By Justin Lemire-Elmore

We're new stepping closer to the full release of the V3.1 Cycle Analyst firmware and are smoothing the upgrade process. The Cycle Analyst software suite has been updated to contain the latest 3.1b20 firmware. This latest build is available for Windows, Linux, and Mac. And if you are missing the USB->TTL programming cable, we have that now available on the amazon store too, along along with the digital aux buttons.

Earlier this year we produced a video showcasing the new digital aux input buttons, and have now prepared 4 more short youtube videos highlighting some of the other new features available in the 3.1 firmware, from screen customization to factory resets. Have a look


Video showing the ability to view custom parameters on CA display New Ebrake Options
Youtube video showing the ability to customize what item(s) show up in the main screen. Youtube video showing new ebrake setup menu table, with proportinal regen, logic polarity, and minimum brake time.
Showing and Hiding Display Screens Factory Reset Feature
Video tutorial on selecting and hiding which display screens show up when still or when moving.  Demonstration of the new factory reset feature, where you can restore all of your CA3.1 settings to a factory default state. 
Posted By Justin Lemire-Elmore

Leaps of Joy, Spring Cargo Ebike Sale

March 14, 2017 7:12:23 PM PDT

At last Xtracycle has released the long awaited follow up of their FreeRadical bolt on cargo extenion kit, now called the Xtracycle Leap. It's a full redesign that is cleaner, more rugged, and more versatile than the original, with accomdation for 24" - 29" wheel sizes and a greatly improved frame attachment system.

Xtracycle Leap Views

We've got them in stock both stand alone and as part of a full electric package with a rear geared or direct drive hub motor. And to celebrate their arrival, and cargo ebikes in general, we're having a month long sales event on most of our cargo packages to kick start the season!  This includes:

  25% discount on the great value eZee Expedir bikes  
  (no coupon needed)  
  20% discount on the Yuba Cycle Stoker system   (coupon StokeRight)  
  15% discount on the classic Stokemonkey kit    (coupon StokeLeft)  
  10% discount on the new Leap + Motor kits   (coupon LeapHigh)  
  A free Satiator upgrade wih the Juiced Bikes ODK   (coupon FastCharge)  

To use the coupon codes, you'll need to be logged into our website with an account and then you will have the opportunity to put in the code during checkout. This sale will last until April 15th. 

Cargo Ebikes on Grin Floor
Plus, for local Vancouver customers are selling our floor model Yuba Mundo and 2014 Edgerunner ebikes, both with Cycle Stoker drive systems installed. So if you've been mulling over a cargo ebike purchase for a while but have been a bit leary of the prices, now is the time to drop by our shop for a visit.

Posted By Justin Lemire-Elmore

Vancouver Bike Show LogoWe're used to travelling all around to various trade shows and events but it's been a while since we've had one in our own backyard. This coming weekend Grin will have a booth in the Vancouver Bike Show at the Vancouver Convention Center downtown.

Not only will we be showing off some of the great new Grin products like the LiGo batteries, All Axle hub motor, Tripwire brake cutoffs, Satiators and Phaserunners, and all that, but we're also running a sale on cargo ebikes, including 25% off on brand new eZee Expedirs. There will be floor models to try and both Bike Friday and Brompton folding bike kits built up as well.

If you are into the Bike and/or Outdoor scene in Vancouver, there is a lot going on at the Convention center this weekend so we recommend you register and come for a visit. Our booth is B300 near the Bike Trials Show.

Floor Map of Vancouver Bike Show

UPDATE:  Our first day at the VBS has been really great and we look forwards to meeting many more local Vancouverites on Sunday. There is lots to see and we have some show specials to offer those who visit so it.our little booth.

Aaron at Updated display case booth at VBS 2017 Explaining all the kit options...

Posted By Justin Lemire-Elmore

Introducing the LiGo Batteries

February 21, 2017 1:21:11 AM PST

Last week was a momentous occasion for Grin Technologies, as our innovative LiGo battery modules got ready for primetime. I'll let the video do the talking!

A Video by Grin Technologies

Posted By Justin Lemire-Elmore

Digi Aux Buttons and CA 3.1 Beta

February 10, 2017 11:39:32 AM PST

Our product update and video for this week relates to something close to our hearts, the seemingly timeless Cycle Analyst. While the Version 3.0 CA firmware has been stabilized for some time, our partner Teklektik has been quietly working very hard towards a 3.1 release that fully realizes all of the features we had originally envisioned for this device. One of the best of these is a dual button control input, making on the fly adjustments easier than ever before. Have a look:

A Video by Grin Technologies

Using this requires first updating your Cycle Analyst firmware. The V3.1 beta releases have been published on endless-sphere since last spring, but the latest CA3.1B13 code is getting very close to the final release, and we think it's time fo a wider swath of users to check check it out. You can download it from ES or our CA3 info page, just keep in mind that an upgrade from a 3.0 device will overwrite all of your settings and statistics, so make sure to record those first before reflashing.

Digital Aux Input Buttons

We have the inexpensive dual buttons in stock to ship to anyone wanting to get a head start on this upgrade path for their CA devices. Then in March/April we expect to make the 3.1 firmware our new standard that is preloaded on all the CA3 devices, and we will have a number of video tutorials covering the many other new features.

Posted By Justin Lemire-Elmore

Hailong 36V & 52V Batteries with UN38.3 approval

February 2, 2017 8:56:37 PM PST

We quietly started carrying Hailong downtube mount battery packs last fall, but didn't announce anything as they lacked UN38.3 certification and so were available for local pickup only. Well, that's all changed and we now have a 52V 13Ah downtube battery with UN38.3 documents that we can ship over the world. These battery packs are using the Panasonic GA cells, nominally 3.5Ah each but we'll rate them more conservatively at 3.3Ah.

Hailong Downtube Batteries Frame Bag as Alternate Mount for Downtube Packs
These are great low center of gravity batteries for ebikes running 20-25A motor controllers. The BMS circuit is capable of 40A continuous but usage at these levels isn't recommended for cell longevity. For bikes that don't have suitable waterbottle eyelets on the downtube, we also have sourced a nice Banjo Brothers frame bag that holds them neatly from the toptube, and helps your conversion look less like an ebike with the obvious battery exposed.

Not sure how to pick a battery?

Battery Kits Info PageWe've also recently rewritten our battery kits info page, updating it to reflect our 2017 battery options with summary explanation on choosing the best pack for your setup. 

This updated page also includes tips on parallel or series wiring for connecting batteries and other tidbits that you may find useful when considering a new battery purchase. 

Posted By Justin Lemire-Elmore

This time last year we were deep in the throes of converting and renovating a giant warehouse go become a new home for Grin, in preparation for a lengthy business move we didn't really ask for. And now that we're settled in, it's payoff time and are ready to rock like never before. For the foreseeable future we'll have a new product and/or video announcement to share with you every single week.

We'll start things off by announcing the TripWire, a new product for those looking for an ebrake cutoff solution that tacks onto existing brake levers rather than replacing them. We had tried developing devices based on magnets and reed switches, touch sensitive pads, and other technologies over the years, never quite coming up with a scheme we were happy with. Then out of the blue, one of our customers Tim O'Brien approached us with a solution that was truly great. I'll let Tim explain it himself here:

We've been working with Tim to iron out design details and hare happy to have received his first production batch over the holidays. They're available both with a short cable for plugging into a V3 Cycle Analyst device to enable proportional regen, and with a long cable length to go directly to the controller ebrake input if you don't have a CA3 in your setup.

Posted By Justin Lemire-Elmore

Holiday Hours and Wishes

December 21, 2016 5:07:30 PM PST

Best Wishes from all the us at our staff Christmas party

We wish everyone a splendid holiday season and we'll be busy as usual fulfilling orders and answering questions during the next few weeks, being closed just for the statutory holidays on Christmas and New Years. 

Plus for any real last minute shoppers we've decided to open our doors on Saturday Dec 24th from 11am to 4pm. We just received a fresh stock of beginner unicycles and have tons of Grin goodies to stuff under the tree. 

Posted By Justin Lemire-Elmore

72V Satiators, UL, CSA, and Adapters Galore

December 15, 2016 1:30:00 PM PST

72V Satiator ScreenThe 72V Satiators have now passed UL and CSA regulatory testing and are in full production in time for every ebike enthusiast's Christmas wish list. Thank you to all those who participated in the beta/pilot run earlier this year while we sorted out details. We've got them listed not only on our store site but also stocked at amazon.com so that our American friends can get free domestic shipping.


As well, we've greatly increased the number of adapter cables available for making the Satiator more plug and play compatible with 3rd party batteries and ebikes. This includes XT60 connectors used RC batteries, 5.5 x 2.5mm DC Barrel connectors used in most frame batteries, Rosenberger plugs on high-end European setups, and 4-pin XLR plugs for the Juiced bikes, along with our previous Anderson and RCA adapters.

Satiator Output Adapter Cables, XLR, DC, Rosenberger, XT-60, RCA, Anderson

All of these cables are available from the drop-down selector on the Satiator store pages and they all include the TRS jack for computer communications with the USB->TTL cable.

Drop down selector for Satiator adapter cable

Posted By Justin Lemire-Elmore

Geared Stokemonkey Motors and Shift Cutoff

November 20, 2016 11:29:31 AM PST

In April we had changes with the Stokemonkey kit including clampset options and a new SAW motor from Crystalyte. Well now we've got two more great updates. The first is a an option now to use a geared rather than direct drive motor. After a lot of testing we settled on the G02 Bafang hub as the perfect candidate, being 33% lighter and yet having 10-15% more torque with the same controller. With these motors, we use a simple fixed cog bolted on the disk mount and take advantage of the motor's intrinsic freewheel rather than using an external freewheel.

Comparison of Geared and DD Stokemonkey MotorsGeared Stokemonkey Motor on Yuba Mundo CycleStoker

That said the geared motor can make a small audible buzz when running, so for those who prefer the silence and intrinsic rugged simplicity of the heavier direct drive motor we continue to offer both choices.

Gearesensor installed on Yuba Mundo Cycle Stoker KitThe second update is that we're offering the gearsensor.com shift cutoffs as an option with both the classic Stokemonkey and Cycle Stoker kits. This Czech made device goes inline with your shift cable and senses when you are changing gears to automatically cut motor power for a moment so that you have a smooth transition. We've had them in stock for a while, but only recently have had all of our CA3 devices updated to provide 5V power on the ebrake connector allowing for plug and play compatibility. These make the mid-drive motor operation seamless. 

Posted By Justin Lemire-Elmore

Statorade Success and Amazon Availability

November 17, 2016 3:40:00 PM PST

Luer Lock Syringe Tip on Statorade

We're calling our Statorade ferrofluid experiment that started last year a wild success. We've had fleet cargo ebike users (like Shift Delivery) see their average motor temperature drop from in the ~100-110°C range to ~70 degrees. It's enabled people to push the continuous power limits of their direct drive motors up a significant margin, and there's been no evidence at all of compatibility problems with glues, varnishes, and enamels inside the motors. Our recently updated Statorade product info page has the details. 

In order to make the Statorade easier to inject, we've updated the standard package to a Luer Lock style syringe with both a twist lock cap and a small diameter plastic needle. This allows you to drill just a tiny 2mm hole for precise injection with less risk of mess. And, as a plus for people in the US, we've got it stocked on Amazon for cheap shipping. Have a look.

Finally for those with lots of ebike motors in their garage, we've also started offering larger 50mL and 100mL bulk bottles of Statorade. They are on special price now until mid-December.  Our goal was to make all of our direct drive hub motors (Crystalyte, Nine Continent, TDCM, and Grin) statorade compatible in 2016 and we are happy to have succeeded in that.

Posted By Justin Lemire-Elmore

Grinfineon Goes Silent

November 12, 2016 1:29:43 AM PST

The custom line of Grinfineon motor controllers has undergone a big update this fall with the switch to a new control chip. It now runs in silent sine wave mode when the hall sensors are plugged in.

Trapezoidal vs Sinusoidal BLDC Motor Controller Drive

So with direct drive motors the assist is almost as silky smooth as the phaserunners, and in sensorless mode it can run motors up to 28,000 eRPM, making it compatible with even high pole count geared motors like the eZee, BMC, and MAC hubs at conventional cruising speeds. We really can call it universally compatible with any ebike motor in the catalog.

Sinewave Grinfineon Electric Bicycle ControllersThese controllers are all in stock in the 20A, 25A, 35A, and 40A models, and available with the purchase of most of our conversion kits too. We have completed a draft of an updated Grinfineon 2.0 user manual that details this new feature set.


On the downside, we did have to drop a few features that were present in the previous Grinfineon controller circuits:

  1. 1) The input voltage range is no longer compatible with 24V packs due to the use of a switching rather than linear regulator, so it is only for 36V and higher setups (LVC of 27V).
  2. 2) The automatic hall mapping feature is not available with this sine wave mode. So if you are running sensored, it is necessary to ensure you have the correct hall and phase pinout. Our current version is colour for colour matched with eZee and Crystalyte motors, but other hubs (Bafang, MXUS etc.) may require experimenting with the connections.
  3. 3) While we still have proportional / variable regen from a 0.0 to 0.7V throttle signal for use with a V3 Cycle Analyst, the regen from an external ebrake input is fixed at 50% of max. It does not change with application of the throttle voltage.

Very few people these days are using 24V setups and most customers using proportional regen feature have a V3 CA device, so the only real loss here was the automatic hall mapping. However, we found that this feature was causing complications with the trend to higher eRPM motors and decided in the interest of working with fast geared hubs it was best to stick with a fixed hall map. On the whole though, a very nice upgrade that we think you will like. We have remaining inventory of our trapezoidal Grinfineon 40A Devices (for 36-72V setups) with automatic hall mapping available at a special discount for those looking for a great controller deal.

Posted By Justin Lemire-Elmore

New Rear Motor Options, TDCM IGH and 9C+

October 24, 2016 1:39:42 AM PDT

TDCM IGH Motor, 395 rpmThere are some new items in the rear hub motor department in stock here at Grin. First is a fast (395rpm) version of the 5 speed Internal Gear Hub (IGH) motor from TDCM. This high speed winding choice is perfect for folding and recumbent bikes with 20" wheels which can benefit from the internal hub gears, and is also great for people who want a fast ebike setup in a normal 26" wheel without resorting to high voltage batteries. 

In something of a Grin exclusive we've also had both the standard (300rpm) and fast (395rpm) motors in our latest batch made with 0.35mm laminations for reduced core loss, and using our custom high-flex 12 gauge phase cable for the motor lead wires. These Taiwanese made motors are in a different quality league than any of the direct drive hubs we're used to seeing from china and make for very clean derailleur-free ebike builds. The performance details of this new hub are already live on our simulator.

9C+ Rear Motor ExampleThe second update is that we've now got a rear version of the 9C+ motor series in 3 different windings. Like the front 9C+ motors from Grin, this one features 0.35mm laminations for minimal drag when pedaling, and has a thermistor and fully sealed side covers with a statorade injection port in the disk holes. At just $185 it's a great value motor with impressive performance for those who don't mind if the mechanical details like disk rotor alignment, flange wobble etc. are at Chinese standards. 

Posted By Justin Lemire-Elmore

New StVZO Lights

October 14, 2016 1:53:42 PM PDT

It's with a somewhat sad heart that we had to discontinue our popular Lumenator ebike lights earlier this year due to sourcing difficulties on some key parts.  While a Lumenator 2.0 is still in the future, we have two new 3rd party front bike lights which we are happy to offer in the meantime. Both the Benex200 and the RoximX4 have StVZ0 compliant optics, which means that they can provide plenty of light on the road without causing blinding glare to oncoming traffic and fellow cyclists.  Have a look at the image below to see the firm optical cutoff above the horizon. 

StVZO Ebike LightsStVZO Ebike Light Beams

The Benex200 has a 12-75V input range and features both light and motion sensors for automatic control. You can leave the light plugged in and it will automatically turn on whenever you are riding in the dark, and shut itself off after it is parked still for a while or the sun comes out.

The larger RoximX4 light works over an impressive 6V-85V range, meaning that you can power it from a 6V dyno hub right up to a 72V nominal ebike pack. We have custom wired our Roxim light to include a handle mounted push switch for easy on/off control. 

Both models have been terminated with the DC 5.5x2.1mm barrel jack so that they can plug in directly to a Cycle Analyst or Anderson Tap. While neither option is quite as bright as our Lumenator, they still work great as a primary ebike headlight for almost all road and trail riding during the upcoming winter season.

Posted By Justin Lemire-Elmore

Crystalyte H+ Motors, Statorade for All

September 30, 2016 10:18:00 AM PDT

Aug 2016 Clyte Sea Order UnpackingOur August shipment of Crystalyte hub motors has some nice upgrades, so much so that we're ready to call it the H+ motor series:

  • Solid Aluminum Stator Core, rather than pressed steel. Better heat absorption and less likely to bend during disassembly
  • 0.35mm Stator Laminations for reduced eddie current drag torque, and best of all
  • Injection Hole and fully sealed side plates for Statorade compatibility

Statorade Injection of H+ Motors H+ Motor Core Details

That makes our line of Crystalyte direct drive hub motors ripe and ready for high performance applications that can benefit from improved thermal dissipation and efficiency. To select one of these newer motors during checkout, just use the new Statorade Uprade option available on each of the kits.

Fill Port on NSM/SAW MotorsFor the smaller Crysatlyte SAW and NSM motors, as there is no disk brake we've had a small threaded hole put in the side plate that can be closed off with an M3 screw.  So those using the brompton and folding bike kits in hilly conditions can also run the motors longer without overheating by adding a small does of Statorade. 

Posted By Justin Lemire-Elmore

Say What?

July 31, 2016 8:40:53 PM PDT

More details to come later, but we thought you might like a peak at what Justin and some Grin Staff have been burning the midnight oil on for the past several weeks, a project making full use of current and future Grin products.

Complete build details with pictures of the internal parts and construction are on the unicyclist.com forum

Justin is currently at the 18th International Unicon event in Spain testing this out among the world's elite unicycle riders, but as a result we've slipped behind in our timeliness with technical support emails in the past few weeks and apologize for all who have been let down by that. We'll get caught up again as soon as possible and hope otherwise you continue to have a great summer of ebike building and riding, and a happy BC Day to boot.

Posted By Justin Lemire-Elmore

Holy Documentoly

June 20, 2016 10:43:50 PM PDT

We had an agenda this year to tackle product documentation and make it easier for people to find thorough setup guidance and usage notes on their ebike hardware. In fact, we even have a little known section on our website that has a compilation of all the reference docs and user manuals we’ve produced over the years, and should probably call attention to it:

Go to the header LEARN -> DOCUMENTS

Grinfineon User Manual Thumbnail Image

There are two significant additions that we completed in the last week. First is our complete user manual for the Grinfineon controller series, which goes into great detail on all the features and limitations of these almost universal motor controllers.

CA V2.4 Guide Thumbnail

And secondly, we completed a Quickstart guide for the V2.4 Cycle Analyst. This covers all the information and key settings needed to get 95% of users up and running, without delving too much into techno talk. We’re hoping that it strikes the right balance of information vs. intimidation and look forwards to any feedback that you have.

Based on your response, we’ll be doing a series of similar Quickstart guides on setting up the V3 Cycle Analyst for various functions too. And not just print guides but video tutorials as well!


Above is our first stab at that, with a youtube tutorial on how to setup and configure V3 Cycle Analyst to use a magnet ring PAS sensor. If Zuckerberg says that very soon almost all web content will be video, we figure he might be right (again). So it’s time we get with the program. Still no Grin Facebook page though!

Posted By Justin Lemire-Elmore

Complete Cargo Ebikes and New Stuffs

June 9, 2016 7:10:33 PM PDT

Although we are still staunchly a conversion kit / retrofit company, we've been largely perplexed at the lack of shops in Vancouver offering electric cargo bikes and want to address that. So for this summer at least we are offering two ready to roll turn-key cargo ebikes based on open/hackable drive systems that we think are of great quality and value; the eZee Expedir and the Juiced Riders ODK U500.

Juirced Riders U500 and eZee Expedir Electric Cargo Bikes, now at Grin

Both of these cargo ebikes have high capacity (>700 watt-hour) stock batteries, hydraulic disk brakes, and torquey geared hub motors well adept at moving heavy loads up steep hills. The Juiced ODK has 20" front and rear wheels with a simple 3 speed internal hub and is meant as a lower barrier and simple to use ebike, with battery options going up to 32Ah for phenominal range. We've worked closely with Tora, founder of Juiced, for many years now and have been ever impressed with his energy and accomplishments and building his accessible utility bike vision into reality. Below is a great recent video review of the U500 bike from electricbikereports:

The Expedir meanwhile is eZee's foray into the cargo bike territory and is a complete bicycle running a more sophisticated hardware set: with 9 speed shimano Alvio RD drivechain, Magura disk brakes, and a sturdy center stand. It uses a 26" front wheel and 24" rear, giving a somewhat lower cargo deck height than say the Yuba Mundo, but not so low that adult passengers have to lift their feet off the ground.

We have the Yepp Maxi child seat and several other accessories available for these bikes. Neither come stock with cargo bags though, and for that we recommend the cargo slings from Carsick Designs

Other New Stuff?

New Items category on Grin web store
We've added a "new items" category to our website to make it easier for people who check in frequently to see view more recently added goods that are new since the last visit. In addition to these cargo ebikes, you'll see many small items that haven't been announced on our blog, like eZee motor extension cables, handlebar mounted potentiometer for the CA3, connector boxes, the gear sensor cutoff for mid-drives and even the BEAMts chain tension torque sensor.

Plus, the observant may have noticed that the Phaserunner controllers and Satiator chargers are available to purchase again with a back order, meaning we are confident of their near term pending availability. 

Posted By Justin Lemire-Elmore

2016 Maker Faire

June 2, 2016 2:11:17 PM PDT

First of all, a big thanks to everyone who came by to meet us at the bay area Maker Faire at the end of last month, and to all the shops and people we visited on the road trip coming back up. It was fun to have a formal booth presence again to educate people about electric bike and skateboard technology, even in a space awash with drones and 3D printers.

Visitors at Grin's 2016 Maker Faire BoothBike Friday Visit in EugeneSterling at Bend Electric BikesHenry of BikeSwift working on Xtracycle Leap ProjectG & O Family Cyclery Visit

We had a pretty mad couple weeks cramming in the projects on exhibit, including a novel take on a mid-drive system and a revival of our first pedalable e-uni. Unfortunately that meant our order queue and email responses got backlogged by up to a week and we apologize to those affected. As of now at least things are all caught up and we are back to snappy order fulfillment and responses.

Although we won't have a booth presence at the local Vancouver Mini Maker Faire on June 11th-12th, we do recommend anyone interested in DIY projects to attend if they can make it.

Posted By Justin Lemire-Elmore

2016 Retirements and Updates - Long Post

May 15, 2016 4:57:06 PM PDT

Things are finally rolling smoothly across the board at our new shop space on Powell St., and that means we can get back to new product engineering, and also properly communicate what is going on with our inventory plans. Some products have run their course, some are due for improvements, and others are getting revamped from scratch. 

New eZee Flat Batteries 33% more range

First, we've had our next batch of eZee flat rack batteries updated to use 2.9Ah Panasonic PF cells rather than the 2.2Ah Sony V3 cells. That provides 33% more capacity but at the same size, weight, and cost as the previous packs. The 36V 15Ah battery is now 36V 20Ah, and the 48V 10.5Ah pack is now 14 Ah. We loved the incredible cycle and calendar life of the Sony V3 cells but the improved capacity at the same price from Panasonic is too hard to pass up. eZee Flat Battery, Upgraded Panasonic Cells vs Sony V3

Lumenator Light 1.0 Retired

Secondly, we've fully retired the 1000 Lumen Cycle Lumenator light. For the 6 years we've been producing it, this device has helped many people light up the streets with their ebikes but at the same time has been the source of some consternation to oncoming traffic. We are working to have the original Lumenator re-engineered with a similarly powerful headlight that has purely reflective optics which meet the German StVZO requirement for minimal brightness above the horizon, and should have it ready before the start of summer.

Prototype Relfective LED Lense for STVzOAsymmetric beam output with cutoff above horizon

48V and 72V Satiator Models, Limited Supply

A few weeks ago we ran out our last fully QC passed Satiator devices and started listing at a discount those that were perfectly fine but didn't quite pass our 1PSI air leakage test. That means that we can't guarantee against water ingress if used extensively in the rain with water exposure. There are only a handful of these remaining.

Similarly, our pilot launch of 72V Satiator devices is on hold while we re-design some aspects of the power circuit after having several field failures, and we thank the Pilot testers for helping us iron this out.

Both the standard 48V and revised 72V Satiators should be in full supply again in early June. The positive user feedback for Satiators has been awesome and we really look forwards to getting this nailed for 2016 and available to all who want one.

eZee Rear Motor with Cassette Freehub

eZee Rear Hub Motor with Cassette Freehub

Finally, eZee is now manufacturing a rear motor with a high-end cassette freehub system which we've got available in  standard 250 rpm  and fast 350 rpm winding options. They cost a fair bit more than the screw-on freewheel version so for the stock laced kits we are sticking with freewheels. But for those who want a kit using all modern bike hardware standards for 9 or 10 speed cassettes, these make a great choice.


What about the Phaserunner, LiGo Batteries, and Thru-Axle Grin Motors?

Stay tuned for our next homepage updates for all of those exciting things coming out of Grin, as well as new documentation, video tutorials, torque sensor options, and a serious overhaul of the CycleStoker system.

Posted By Justin Lemire-Elmore

Some Motor Changes for 2016

April 18, 2016 8:16:25 AM PDT

We're often in the midst of evaluating and revising our product offerings and figured it was a good idea to shed some light on our plans for 2016. In addition to the Thru-Axle motor discussed in the last blog post, we’ve got some other items that are actually available now.

9C+ Front Motors with Statorade:

Our plan for 2016 is to have Statorade and 0.35mm laminations by default in all of our direct drive hub motors, reducing the rolling drag and increasing the heat dissipation capabilities across the board. We're starting this off by introducing what we call the 9C+ hub motor series which we quietly slipped on our website last month.

9C+ Hub Motor with Cogging Torque Comparison

Outwardly this looks like a generic 205mm DD hub. But internally it has the 0.35mm core, a drilled through disk hole for injecting fluid, a thorough silicone sealant on the side plate to prevent fluid leakage, an embedded thermistor for temperature sensing, and is already pre-loaded with 5mL of Statorade. And at just $175 for the hub it's probably the best value drive option we've ever offered.

The 9C+ motors are available in front drives in a 5,6, and 7 turn winding, either as a bare hub, hand-built into a wheel, or as part of a complete conversion kit. They are also modeled on our simulator as the 9C+ 27XX option.

Mini Geared Hubs, from Outrider to Bafang:

We've stopped carrying the small geared motors from Outrider, and are replacing these with a similar sized G01 series hub from Bafang. This particular motor is much easier to service, has cables exiting from the side plate rather the end of the axle, has better disk brake compatibility, and is customized for us with an internal thermistor for motor temperature sensing.

Bafang G01 Motor vs Outrider Geared Hub

It should be a dandy option for the light weight lower power (250-500 watt) conversion systems, and we've got both fast (10rpm/V) and standard (8rpm/V) winding options for to suit different wheel diameters and pack voltages. The hub is already on our simulator, spoke calculator, and is available either as a bare hub, laced into a rim, or as part of a complete conversion kit.

Stokemonkeys Back with Options

And finally, we've largely finished setting up our CNC machine center and welding stations in our new space, allowing us to resume fabricating the stokemonkey kit hardware which was out of stock for a little while. We're now now offering the stokemonkey clampset with specific ID's to match several common tube diameter for an ideal clamping fit, and even have a custom option where we will CNC it to your specific tube size.

2016 Stokemonkey Updates

We've also switched the motor source back to Crystalyte just like the very original SM motors were based, but using their newer SAW40X motor line instead of the 400 series.

Posted By Justin Lemire-Elmore

Post Taipei Updates

March 21, 2016 4:46:20 AM PDT

Well that was quite the whirlwind tour through Taiwan and China, Justin and Robbie would like to thank all of those we met up with at the Taipei Bike Show and tour visits afterwords. Benjamin, Tora, Ching, Britt, Harry, Paul, and all the AU and NZ folks it was great to hang out and share our interests and visions for the ebike movement.

Ben, Bike, and Crew Gluing Motor Magnets at eZee Factory TDCM Factory Visit Riding Cargo Ebike on rural roads from eZee to EM3EV Visit with Cutler MAC Motors Testing Phaserunner on Juiced Rider ODK with Tora

There are a lot of good things that will be coming from this trip, and we're looking forwards to closer relationships and some joint endeavors this year with Juiced Riders, EM3EV, TDCM and other companies doing innovative product developments. We feel strongly that some collaborative efforts can help bring signifcant ebike tech advances to a larger audience. And on that front, we also brought along 3 of our own projects that are at the end of their long development cycle and are ready to show:

(Direct Youtube Link)

The Thru-Axle Motor, 2nd Gen Phaserunner Controller, and Potted LiGo battery packs have all sub-components in place and are ready for production, if only we hadn't just lost our production facility when we moved shop this past month! So we are still busy doing all the electrical wiring, machine installation, and related manufacturing infrastructure at the Powell St. address before we can make these available. We should be ready well in time for the 2016 bike season so please stay tuned to our homepage or newsletter if you want to be first in line during the rollout.

Posted By Justin Lemire-Elmore

Well this is it. Our last outgoing shipments from 4th Ave have been picked up and the big tear-down is taking place in earnest. We’ll be fully closed on Friday as we peel back the 5 years spent making this place into our home and pack everything over to the new digs. It’s an exciting expansion and we’ve really appreciated all the words of encouragement that many of you have sent our way.  

Grin's Manufacturing Packing UpGrin Shop TeardownGrin Shop Teardown

Business as usual should be able to resume after the weekend on Tuesday, but do expect delays before all normal operations are up to speed. As well, Justin and others from the engineering team will be the Taipei bike show next week and so technical inquires and conversations may be deferred until their return in mid-march. 

Posted By Justin Lemire-Elmore

After running out of stock of the first production run of Satiators earlier this year we've now got our next batch on hand which includes the same hardware updates as the 72V devices, with the AC inlet cable on the back side.  The other awesome electrical specs for rapid charging of 24-48V batteries all remain identical, but this modification does mean that the original UL/CSA regulatory approval is no longer valid. 

Rev6 versus Rev7 Satiator Hardware ComparedCertification Pending

For now we are shipping with the regulatory markings covered up as shown in the image above until we have the test approval completed. In the meantime, if you do have a requirement for UL listing on the device then the chargers remaining at Amazon.com all are all from the original run.

Posted By Justin Lemire-Elmore

Big Move

January 31, 2016 9:18:54 PM PST

4th Ave Location for LeaseOnce again we have a "For Lease" sign on our building, and once again fear not because we are simply moving our business to an even bigger and better location.  While we've enjoyed the False Creek neighborhood for the last 5 years, it's clear that this vestigial industrial area in the heart of Vancouver is rapidly changing in character to serve the nearby condo developments, rather than the historic manufacturing industries it once spawned.

On March 1st we'll be fully moved to a new location in Strathcona at 950 Powell Street, with nearly 3 times the space, great neighbors like EatART and Maker Labs, and room to grow for years to come.  This is a big and exciting next step for Grin, and the team here has been hard at work the past few weeks getting this space renovated, setup, and ready to serve as our new home well into the next decade.

Kitchen and Staffroom Steel Stud Hallway Takedown Concrete floor polishing

We will try to continue with business as usual during the entire transition process next month with a minimal amount of order disruption.  However, it's a significant job and much of our staffing manpower will be redirected to the move, especially towards the 2nd half of February. So please be patient if there are delays in communication as lower priority jobs are put on hold.

Posted By Justin Lemire-Elmore

Big Crystalyte Motor Sale

January 31, 2016 8:36:28 PM PST

In the meantime, in order to lighten our load on moving day we are having a significant sale on our entire inventory of the large Crystalyte H35 and Crown motors and kits, ranging between 25 to 30% off.  There isn't a better time to start a winter build project than this. You can get a great deal on a direct-drive motor package and simultaneously help us out with the moving process!

Crystalyte Motor Sale

The sale will go on from now until Feb 25th, and we’re hoping that you can help us clear a good number of these boxes from our rack shelving before we need to move out.    

We do also have a slight ulterior motive in that we want all of our direct drive motors in 2016 to be compatible with Statorade coolant, but the stock Crystalyte side covers aren't always sealed well enough to prevent leakage at high RPM's. Our next Crystalyte motor batch will be certified Statorade-ready, but these ones require reworking the side cover seal with silicone before adding a fluid coolant inside.

Posted By Justin Lemire-Elmore

Show Your True Colours

January 24, 2016 3:55:00 AM PST

Our tidy wiring kit has been a popular way to get clean cable runs and covered connectors on your ebike project. And being all black it does a reasonable stealthy job of it. But what if you’ve got a colourful bike and want a bit more zing? 

Red, Yellow, and Blue Tidy Ebike Wiring Kits

Grin’s manufacturing crew has been playing with fabric dyes and suppliers of coloured spiral wrap and zip-ties to produce bright yellow, red, and blue wiring kits too.

We love seeing ebike conversions where people pay extra attention to the look and details of their installation. So we’re starting a little contest for people who order one of the coloured wiring kits between now and Mar 1st.  Send us a picture of your finished ebike project featuring one of these routing kits and we’ll award our favorite 2 conversions with a 20% off coupon for your next order.

Posted By Justin Lemire-Elmore

New Product, TDCM Internal Gear Hub Motors

January 19, 2016 12:21:34 AM PST

The company TDCM from Taiwan has been among the more innovative players in the electric bicycle space. We’ve been carrying their bottom bracket torque sensors for a while but last year one of their motors really caught our eye. This was a direct drive motor surrounding an internal 5 speed Sturmey Archer hub.  You get the benefits of a derailleur-free 5 speed transmission with a 243% gear ratio plus a ~500-1000 watt hub motor all in one tidy package. 

TDCM IGH Hub Motor with 5spd Sturmey Archer Hub Separated

We wind tunnel and dyno tested this motor last summer and liked almost everything about it, and are happy to have this in stock in a fast winding both as the bare hub and also as part of a complete kit.  The motor includes an internal 10K thermistor for temperature sensing with a V3 Cycle Analyst, and is the first hub that we are offering pre-filled with Statorade for improved thermal performance. 

Posted By Justin Lemire-Elmore

Great news to kick off the New Year. We are now dropping the price of all our V2 and V3 Cycle Analyst devices, to just $95 for a V2.4 CA-DP and $125 for a V3.0 unit. Having served as our flagship product for a decade and financed most of Grin’s R&D activities, we owe a lot to the Cycle Analyst, but we feel it’s time for other products to move in as our main breadwinners and pass the CA savings back to you.

Price Reduction of Cycle Analysts

The V3.0 Cycle Analyst firmware is now officially at 3.0, no more Prelim6, p12, p13 etc.  as the latest tweaks have made it as rock stable as we could hope. Anyone with an existing CA3 can update to this firmware via the software download page. On new CA orders the USB->TTL programming cable for updating firmware is now no longer included in the package, but can easily be added as an accessory if desired.

Posted By Justin Lemire-Elmore

Thank you all for the many well wishes for our 10 year anniversary celebrations, it’s been a joy having so many customers who have been around for huge chunks of the ride.

Extended Range Satiator Family

While the 10% sale is over, there are other great things to be excited about. First and foremost? We’ve started our beta sales program for high voltage Satiator chargers. Now rather than being limited to 63V or 15s packs, the 72V 5A model can work all the way up to 103V for 24s lithium batteries for those hot rod ebike applications.

72V Satiator Charger Preview

There are a limited number of 24V 15A and 72V 5A units from our pilot production run available for early adopters who don’t require UL/CSA certification, and if you order by this weekend with Fedex shipping it should make it in time for the Christmas Tree.

Flexible Power Cables

Secondly, after years of wondering why there were no great heavy gauge cable sources for ebike battery and motor wiring, we decided to bite the bullet and have thousands of meters of our custom cable manufactured. 

Custom high flexibility motor phase cable and battery cables for ebikes

The 3 phase motor cable has high flexibility 413 strand 12 gauge phase wire with Teflon insulation, and also includes 7 signal wires too, for your motor hall sensors and thermistors. All of this is bundled in a round 9mm diameter flexible jacket and it stays flexible all the way to -30oC.

For our custom battery cable, instead of going with 2 conductors, we went for a 4 conductor instead. A pair of heavy 13g wires and a set of thinner 18g wires also with high strand count and flexibility. That allows one cable to have say both the charging and discharging ports on a battery, or an additional tap point for powering accessories. Or, you can just parallel connect the thin and thick wires together to have 12 gauge equivalent.

2015 Housecleaning Garage Sale

And finally, we’re clearing out a bunch of used ebike stuff that has been allowed to accumulate over the past year. So if you are looking for some bargain priced garage sale items, John’s got everything posted up on an endless-sphere buy/sell thread.   

ebike parts on garage clearance

Posted By Justin Lemire-Elmore

GrinTech 10 Year Celebration Party

Nov 30th, 2005 marks the day that the Renaissance Bicycle Company Ltd. was formally recognized as a registered company here in BC.

Back then, we were being somewhat cutting edge offering custom layout NiMH battery packs when almost everything was lead acid. Early hub motors and mid-drive systems were battling it out. Rechargeable lithium batteries were a promise of the future but still exceedingly unreliable, motor controllers were analog and didn't even have a microchip; the DrainBrain was being hand soldered in batches of a dozen at a time in a basement; and scarcely anyone on the streets had heard of an electric bicycle. Oh the world seemed ripe with possibility.

Early team of Renaissance Bicycle CoDrainbrain Production Line from 2005One of or first Triangular frame mounted NiMH Pack Designs, 2006Can you imagine this parallel lithium battery charger the size of a briefcase?

And now here we are, 10 years on to the day. The lithium ebike packs are ubiquitous with power, energy, and reliability specs that could only be dreamed of back then. Motor controllers run sophisticated DSP's that do vector alignment of the 3 phase drive; the DrainBrain evolved several generations of Cycle Analyst and has sold over 25,000 pieces; hub motors and mid-drives are still battling it out; and you'd be hard pressed to find anyone who hasn't heard of an ebike or knows someone who rides one.

Throughout this we've managed to survive and grow year after year, leading the field in some areas while lagging in others, but always staying focused on the unique needs DIY entrepreneurs and enthusiasts who want to make their own 2-3 wheeled electric vehicle creations.

We're not much for cyber-Monday type blowout sales but as a small token we're celebrating the occasion with a blanket 10% discount on all items in our store, which will last until Dec 10th, to honor these 10 years. Simply log-in with your customer account (or create one if you haven’t done so), and you'll see the prices reduced by 10%.

Posted By Justin Lemire-Elmore

CA3 Proportional Regen

November 28, 2015 11:28:00 AM PST

Since March of this year we’ve quietly rolled out numerous minute improvements in the V3 Cycle Analyst firmware. Now the latest CA3P13 code includes support for Proportional Regenerative Braking with any Grinfineon or Phaserunner motor controller. Simply squeeze the ebrakes for a base regen and use your throttle to dial it in! Have a read of the cumulative release notes for all the details or see the video below for a quick summary.

There’s no need to upgrade if you are happy with how everything is running. But if you use the auxiliary input potentiometer, torque or PAS control, or have a system that supports proportional regen via a 0.0-0.8V throttle signal, then an update for these new features could be worthwhile.

The CA3P13 firmware package can be downloaded from here.

Posted By Justin Lemire-Elmore

Injecting Statorade into Test Hub MotorWe're looking for people who want to participate in one of the biggest recent breakthroughs in the thermal management and hence power handling capability of direct drive hub motors.  If you've got an ebike setup with motor temperature monitoring and routinely see core temperatures in the 100+ oC range, then please read on because this post is for you!

See, earlier this year we built a wind tunnel in our lab for doing full testing of hub motors in conditions that mimic riding in the road. Our motivation was to better understand and model how hot motors get in heavy use at different vehicle speeds, both for predictive reasons and see what techniques can push that working envelope further.

Wind Tunnel Fan Blade powered by Stokemonkey Motor Grin Wind Tunnel for Hub Motor Thermal Testing

Well, in addition to the usual suspects of ventilation holes, vanes, and oil cooling, we also experimented with magnetically active ferrofluids. The theory was that the magnetic fluid would stay put in the air-gap and not leak out everywhere as is common with conventional oil cooling. What we didn't anticipate was just how TINY an amount was required to achieve remarkable effects.  With just 4-5 mL, you could have almost as much cooling benefit as a full cup of messy ATF, with almost no perceptible increase in the rolling drag of the wheel. 

The net effect is that you can run a given motor at about 40% higher continuous torque and power outputs without overheating.  Or correspondingly, a motor that used to run at like ~110-120 degrees in a given situation would now be sitting at a much more comfortable 70-80 degrees. Have a look here at our own GRIN designed prototype hub motor when dissipating just under 100 watts of power.  The steady state core temperature drops from 68 °C down to 43 °C. 

Test Results of Statorade Cooling Effects on Hub Motor

You get this without exposing the motor core to the outside environment like air cooling, and without the impossible sealing complications and additional rolling drag from oil fills.

Statorade PackageWhat we are still looking to understand are the long term stability and maintenance concerns; whether it lasts for years and years or will need frequent or occasional replenishment, and also what if any compatibility issues might exist with magnet bonding adhesives in the motors.  If you want to be part of this endeavor, then we've got 10mL syringes of Statorade packaged and bundled and ready for you. 

Posted By Justin Lemire-Elmore

Things Keep Getting Better

August 20, 2015 4:19:58 PM PDT

One thing for sure about the electric bicycle scene is that things don't sit static, incremental improvements are happening year after year. 



First and foremost is that the 18650 battery cell standard has evolved to specifications that were previously only dreamed of. Without changing anything to the weight or price of their packs, Allcell recently switched to a newer LG MG1 cell model. This turns the 15Ah pack into a 17Ah pack, and the 20Ah pack into 23Ah, and simultaneously cuts the internal resistance and voltage sag almost in half compared the 15 and 20Ah packs. 
 Allcell 20Ah vs 23Ah
All our Allcell packs are of this 2015 model with MG1 cells, and we've added them to the charge simulator and hub motor simulator to see the difference. 

Charge Simulator

It's not just LG that has been releasing cells with both high capacities (>2700mAh) and high current handling capabilities. Sony, Samsung, Panasonic etc. have all been updating their lineups of 18650 cells making this an exciting time for ebike battery capabilities. We've now refreshed the ebikes.ca charge simulator to include dozens of new and old cell models, so anyone using the Satiator charger will be able to set their full charge voltage thresholds more precisely for a specific target battery capacity.  Just select the cell type in your pack from the drop-down menu along with the correct series/parallel layout and you'll have a full charge simulation at your fingertips. 
Cell Selection on Charge Simulator

Charging, Satiator 1.0 Firmware

And did we mention charging batteries? For those with a Satiator charging doesn't get much better. We've now released the 1.0 satiator firmware and software suite which has two major new features along with numerous small improvement tweaks to the user interface and charge behavior.
Satiator v1.0 Graph Example
The first of these is graphing! You can now see a real time plot of your charging voltage and current every time you plug in and charge a battery pack.  The graph autoscales sensibly, and looking at the charge graph rather than just the final amp-hours can tell you interesting things, like how much time was spent in constant voltage mode versus bulk charging, and whether the current from the Satiator was reduced due to thermal rollback etc. 
 Satiator Profile Statistics
The second major feature is charge statistics.  The V1.0 Satiator firmware not only keeps track of how many charging amp-hours and watt hours it itself has delivered over its life, it also keeps track of the total cycle statistics on each individual profile too. So now you will have an automatic record of how many cycles and kWhrs of energy you've put into your battery pack, and if you use multiple profiles on the same pack you'll have a breakdown of how often you've charged it to 80% vs 100%, fast charge vs slow charge etc.
This information is invaluable in understanding the life cycle costs of a battery pack under different charge scenarios, and can compliment the data from a Cycle Analyst or similar device that records the discharge statistics. The more people we have collecting real world performance data like this instead of just contrived lab test data, then the better the community as a whole can know what to expect for battery longevity. 
Small tweaks include a new "About Satiator" section of the setup menu that shows current info on the device, the ability to see the previous charge cycle amp-hours even after you have disconnected the pack, the ability to display battery temperature on any pack (not just NiMH/NiCad) by hooking up a thermistor, and a better fault handling behavior when dealing with packs that have problematic BMS circuits and whatnot.
This new 1.0 version of Satiator firmware does require a new software suite in order to display all the new information, and the software and firmware are available for download right now. Please click the appropriate link to embark on the best charging experience ever. 

Field Oriented Controller

And back to the subject of things getting better. The pilot run of BAC500+ field oriented motor controllers that we launched late last year was a good success, but what follows is even better. The PhaseRunner is based on ASI's BAC800 controller units with a special heatsink, potted enclosure, and cable harness all made here at Grin. It can run at higher voltages (95V instead of just 60V max), higher phase currents (80A rather than 60A), and has a smaller and narrower footprint, all at the same price. Many more details are available by reading through the endless-sphere thread starting here
PhaseRunner Motor Controllers

We're hoping to make this a standard and stock cornerstone of our controller and kit offerings by fall of 2015, but in the meantime we're still producing a couple of these a day for advanced technical users. 

Alex DM24 Rims with 3D Drilling

DM24 Rim with 3D Drilling

Anyone who has laced a large diameter hub motor into a small diameter rim will be more than familiar with the problem of spoke angle. Just a single cross pattern will produce an angle that puts large stresses on the nipple and bends the spoke, something we've modeled on the hub motor spoke calculator for people to anticipate. Alex Rims has been offering 3D drilling of their spoke nipple holes in the rim to allow the nipple to exit at an angle rather than radially inwards, and we got a large number of these in a 20" rims size drilled out to 14 degrees which should allow you to do single cross lacing jobs when previously only radial would make sense.  

Unfortunately, the 3D drilling is not compatible with their rim eyelets at the moment, so for the 24", 26" and 700c DM24 rims we opted to go for stainless eyelets instead. 

Shop Video Tour

Last week we also had an unexpected visit from Court, who runs the excellent electric bicycle review site electricbikereview.com.  What was supposed to be just a short quick shop tour ended up taking a good chunk of the afternoon, which Court kindly recorded and uploaded to youtube. If anyone is curious to see the inner workings here at Grin and has time to spare, enjoy the video.

Posted By Justin Lemire-Elmore

Trip Analyzer Update - Oops

August 7, 2015 1:55:38 PM PDT

Sometimes we do a lot of work on a project and totally forget to announce it anywhere. That happened a few months ago when we finished a large round of enhancements to the online CA Trip Analyzer software, courtesy of the hard work of our UBC co-op students Mila and Shivan. Then moved onto our next endeavors and forgot to make a peep. 

The latest enhancements apply most specifically to the V3 Cycle Analyst devices, since the software now shows all the extended data such as human torque, motor temperature, pedal cadence etc. This extended data is shown on a second graph allowing you to customize not only which items to display, but also whether they scale on the left or right axis and how or if numeric stats on the right should be computed.

Example of Cycle Analyst Trip Analysis Software

We've also made it so that named trip sections are highlighted in different colours and shown on the slider bar, allowing for easier visualization of the trip regions when communicating or sharing adventures. All of these capabilities are now summarized in the FAQ section. As always we appreciate feedback from people using these web tools. If you've got an interesting trip upload to share, please send the URL our way.  

Posted By Justin Lemire-Elmore

First Newsletters and Videos

July 10, 2015 3:30:41 PM PDT

Grin's First Newsletter

This February we quietly added a newsletter signup to our homepage for people wanting an active update on new stuff at Grin. Many hundreds have subscribed we're glad to have gotten the first newsletter out the door this weekend. It's a long one but worth a look, future updates are expected to be shorter and sent out every few couple months to keep you abreast of our undertakings:

If you're interested in having Grin updates sent to your inbox instead of sending your browser back to our website blog all the time then consider signing up. There is no need to have an account on our store site, simply enter your email address in the box to the right. However, if you do have an accont then you can easily enable newsletter subscription from inside your account settings too.


How to subscribe to newsletter from account settings

Say Videos

Dan Sgzatti in Full GloryAs part of our effort to be a tad more proactive in sharing the good word on our products, our resident dealer rep and sales guy Danial Sgzatti has produced an excellent little intro video on the Cycle Satiator charger. This short clip is meant to help highlight the Satiator benefits without having to read tons of text on our site, and we'd welcome you to have a look.


Click to see Satiator intro video in Youtube

Posted By Justin Lemire-Elmore

On the Subject of Cargo

June 18, 2015 11:18:22 AM PDT

Well, the informal Cargo Bike Championships were a real blast, with last minute entries bringing in a total to 37 participants. The event spirit wonderfully captured on video by Iaco Rocher here:

    Click to see video summary of event      Members of the Grin team and their rides


We wanted to publicly congratulate the two winners of prizes sponsored by Grin. Philip Marciniak got a V3 Cycle Analyst and LED light kit for the best custom built ebike for his scratch build longjohn style bike used for his appliance repair business.

And Fabrizio Cross got a $200 gift certificate for setting the electric speed record for the fastest lap on full scratch-built semi recumbent bike, with room for both children on the back. This is one of those builds that blurs the lines a bit between ebikes and higher powered 2-wheelers, but the wide scooter wheels and full suspension do wonders to smooth travel on the bumpy roads of his hometown on Hornby Island. 

Side View of Bare Frame

Also a shout out to Stuart and the Lecicle, who showed up with the best family bike designed by kids that we’ve ever seen!

Yuba Cycle Stokers

After a very successful pilot run, we’ve now done a full production and release of the Cycle Stoker kit for Yuba Mundo cargo bikes. Thanks to all those who’ve participated to resolve any kinks as we expanded this kit to the popular Yuba platform. We’ve updated the Cycle Stoker info page has recently to include a lot more details about this mid-drive option to answer questions for anyone else who is considering it

For those still awaiting a Cycle Stoker kit for Big Dummy cargo bikes, that will be next inline on this project. 

Posted By Justin Lemire-Elmore

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