... wheel ISO9001:2000 OEM available A3 steel(1023), 45#steel(1045), 16Mn Motorcycle Chain Sprocket Wheel Motorcycle rear sprocket, motor sprocket ... , motor complete sprocket, motorcycle complete sprocket and chain, motor complete chain and sprocket. OEM is welcome and we also ... 14T/15T/16T/17T, etc. Meterial A3 steel (1023 steel, SAE Q235B), 45# steel(1045 steel, SAE Q345),16Mn, etc. Surface Treatment1. ...