Although we've been pretty sold on hub motors for the vast majority of conversions, there is a case to be made for mid-drive systems especially in the application of load and cargo hauling applications. That is where the Stokemonkey system from Clevercycles has been a natural match. It is designed to install around the Xtracycle attachment which adds a whole new realm of utility to your bicycle. And unlike most other mid-drives which have a loud and whining gear noise to put up with, the Stokemonkey using the familiar low-rpm Crystalyte motors is completely silent. We have a limited number of Stokemonkey setups that will be listed on our kits page, and will be offering the Xtracycle and accessories in the near future too.