Currie Technologies 19 tooth freewheel sprocket assembly. This gear is most common one on Currie electric bikes which have an electro drive kit with a planetary gear system. All USPD Pro Drive kits with a version 1, 2 or 3 drive system use this gear. All Currie Electric bikes use this gear.
19 Tooth Freewheeling Sprocket For #25 Chain, includes star shaft.
Roller clutch with one-way bearing. Rotates freely in one direction; fixed in other direction.
Upgrading your scooter or bike sprocket.....Change your stock 15-tooth gear for a 19-tooth pinion to increase your top end by 3-5 MPH!This gear will work on a 12mm shaft for scooters as well. Does not require the use of the star shaft which is included with your purchase.