The SuRace M5 Rear Derailleur is designed for 7 and 8-speed MTB drivetrains.Features-11T tension pulleyItem Specifications-Rear Derailleur Mount Type:Shimano Rear Direct Mount-Rear Der/Shifter Compatibility:Shimano Mountain-Color:Black-Cage Length:Long-Drivetrain Speeds:7-Drivetrain Speeds:8-Chain Wrap Capacity (teeth):43-Weight:354-Largest Cog:34