Features of the SRAM Force 10-Speed WiFLi Med Cage Rear Derailleur Carbon & aluminum pulley cage, magnesium inner parallelogram link Must be used with SRAM Double Tap shifter Exact Actuation Ratio delivers 3mm motion per shift across the entire cassette Works with standard or compact 10-speed road cranks Rear Derailleur Mount Type, 10x1 Standard Color, Silver/Black Weight, 190 Largest Cog, 32 Chain Wrap Capacity (teeth), 37 Drivetrain Speeds, 10 Rear Der/Shifter Compatibility, SRAM Exact Actuation Cage Length, Medium