Shimano RD M310 Altus Rear Derailleur

Blacks

Key Features:Altus mountain bike rear derailleur with light action operation and over-size pulleys for a wide gear choiceOversize 13/15-tooth tension and guide pulleys to reduce noise and wearExtension spring and low-friction fluorine-coated link pivot bushing result in a light shifting actionTop normal spring for use with Rapidfire shiftersIG and HG chain, 7- and 8-speed compatibleFor use with 28 to 34 tooth low rear sprockets, total capacity 43 teethSGS

Amazon

Chain Wrap Capacity: 43teeth Derailleur Color: Black Weight: 326g 7/8-speed MegaRange MTB rear derailleur Wide link design for more rigidity and precise shifting Advanced light action Derailleur Action: Top-Normal (Traditional) Drivetrain Spacing: Shimano / SRAM 8 Oversize 15-tooth tensioner and 13-tooth guide pulleys reduce noise and wear