bike derailleurs deore m4100 groupset mountain 1x10-speed 42t 46t sl+rd+cs+hg54 shift m4120 m5120 rear derailleur cs

welcome to our store,we are devoted to offer products with reasonable wholesale price and fast delivery,our company is professional in e-business,your order will be sent our with 1-3 days after we receive order payment,you will be satisfied with the shopping experience in our store.please check the size information before you place the order,all dimensions are measured by hand,there may be some little deviations.hoping you are understand it,look for long term business with you.