 This part is OEM from Currie Technologies, and can be used with our 400w Kollmorgen brushless bike motor, or our 1000w BMC Power Pack bike kit. Currie Technologies 19 tooth freewheel sprocket assembly. The 19 tooth gear is most common on Currie electric bikes which have an electro drive kit. The drive system on these bike use a planetary gear system. All USPD Pro Drive kits with a version 1, 2 or 3 drive system use this gear. The 19 Tooth Freewheeling Sprocket (uses #25 Chain) includes star shaft. This 19t Roller clutch has a with one-way bearing. It Rotates freely in one direction, and is fixed in the other direction. The kit includes: |