COBRA CX 50 Big Wheel 2018-2019 Make COBRA Displacement 50 Model CX 50 Big Wheel Year range 2018-2019 Rear Sprocket 70/75Rear Sprocket 70/75 Black6202222 Rear Sprocket 420More info ChainsChain GP-420642002 Chain GP 420More infoChain V2-420642001 Chain V2 420More info