Freewheel crank assembly to be used with the Grubee 4G 1BMS drive system.This kit will get you there. Developed in cooperation with Grubee using our mature Shifter Kit technology.
Comes with chainrings, hardware, freewheel adapter, 226mm bottom bracket cartridge, freewheel, chain.
For assembly instructions use the first sections of our 4 Stroke Shift Kit installation instructions.
Best when used with this: https://www.grubee.net/collections/4-stoke-bike-engine-items/products/1bms-multi-speed-shift-kit
Impressed out of the box
Posted by Marc Tabor on 06 05 2019
Was impressed as soon as I unpacked it, everything felt solid and durable. All parts included (you would be surprised how often that doesn't happen with some stores). Installed easily. Can't vouch for its durability as part of a jack shaft setup yet, but that will come in its own time.