TheShimano Acera RD-M360 Rear Derailleurhas been designed to provide you with a light action operation and oversize pulleys for a wide gear choice. This rear derailleur is perfect for mountain bikes, featuring 7 and 8 speed compatibility for exceptional shifting performance. The derailleur features oversized 13 tooth tension and guide pulleys to reduce the noise and wear for great longevity. This Acera rear ?derailleur has and extensionspring and low-friction fluorine-coated link pivot bushing result in a light shifting action. Shimano Acera RD-M360 Rear Derailleur SGS Features Light action operation and over-size pulleys for a wide gear choice Oversize 13-tooth tension and guide pulleys to reduce noise and wear Extension spring and low-friction fluorine-coated link pivot bushing result in a light shifting action Top normal spring for use with Rapidfire shifters Shimano Acera RD-M360 Rear Derailleur SGS Specification IG and HG chain compatible Use For: Mountain Bikes with 7 / 8 Speed Drivetrains Use With: 28-34T Low rear sprockets Capacity: 43 Teeth Colours: Black, Silver "