Rear Sprocket #21 fits #428 Chain (37T) (48X68) 

VIEW ALL REAR SPROCKETS

This Chinese ATV rear drive sprocket uses a #428 Chain and the center hole measures approximately 48mm.  Measuring directly across center from mounting bolt to mounting bolt is 68mm.  All 4 mounting holes are NON-threaded and use M8 bolts.

These original equipment replacement rear sprockets will interchange with many other brands and models of Chinese ATVs, Dirt Bikes, Scooters and Go Karts.