Grubee Freewheel Crank Assembly


Master Bike Builder & Forum Sponsor
Dec 28, 2007
Duvall, WA PNW

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, special cranks.......

For assembly instructions use the first sections of our 4 Stroke Shift Kit installation instructions.

Best when used with this: