Shimano RD-M640 Zee Shadow Plus 10 Speed Rear Derailleur Short Cage 36T Max FreerideThe Shimano Zee Shadow Plus RD-M640 10 Speed bicycle Rear Derailleur has a low bracket and profile body which helps to stabilize the chain and prevent chain drop. The derailleur’s direct mount frame allows for riders to remove the rear bicycle wheel easier. This rear derailleur essentially eliminates chain slap through the new clutch technology called Shadow plus. The short cage is designed for free ride and downhill bikes.689228305328
