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.