3.00-10 Rear Knobby Tire & Wheel Kit with 190mm Brake Disc, 420 41T Sprocket, Hydraulic Brake, 12mm Axle & 420 Chain for Dirt Bikes CRF50 XR50 SSR Apollo Taotao Coolster 50cc 70cc 110cc. Wide Compatibility Fits popular dirt bike models including CRF50, XR50, SSR, Apollo, Taotao, and Coolster, covering a wide range of 50cc to 125cc bikes.