The Shimano Altus RD-M310 SGS 7 and 8 Speed Rear Derailleur combines dependable shifting, practical wide range compatibility and excellent everyday value into a reliable option for MTB and general riding. Designed for 7 and 8 speed drivetrains, it delivers light action operation, durable pulley performance and the gearing flexibility needed for varied terrain.Key Features7 and 8 speed rear derailleur designed for dependable MTB shifting performanceSGS long cage design supports wide range gearing setupsOversize 13 and 15 tooth pulleys help reduce noise and wearLight action shifting design improves ease of operationFluorine coated pivot bushing reduces friction for smoother movementExtension spring supports responsive derailleur performanceTop normal spring design works with Rapidfire shiftersCompatible with IG and HG chains for broad drivetrain compatibilitySupports 28 to 34 tooth low rear sprockets for versatile gearing43T total capacity handles wider gear combinationsThe RD-M310 is bu...