Shimano Zee RD-M-640 10-Speed Derailleur

The Zee derailleur represents the new standard of affordable DH rear derailleurs. Featuring Shimano's innovative Shadow Clutch system that virtually eliminates chain slap and a compact shape designed to protect the derailleur from impacts, the Zee rear derailleur is specifically designed to handle the rigors of extreme downhill and sets a new standard for durability and performance.