Shimano Acera Megarange Rear Derailleur

Megapulley system uses oversize 15-tooth tension pulley and 13-tooth guide pulley to reduce noise and wear |SmartCage short pulley cage offers larger gearing capacity that accommodates MegaRange super-low gear and gives good ground clearance |Extension spring and low-friction fluorine-coated link pivot bushings result in a light shifting action |IG and HG chain, 7- and 8-speed compatible