420 Chain Sprocket, 10 Tooth and 20 Tooth 5/8″ Bore Jackshaft Sprocket,

Easy Installation: Equipped with standard 17mm bore and 3/16″ keyway to ensure easy installation for DIY enthusiasts without professional tools. Efficient Transmission: 10-tooth front gears and 20-tooth rear gears combine to provide good acceleration and increased power output, suitable for a variety of terrains and driving needs.