Features of the SRAM Red Rear Derailleur Red Short Cage Carbon fiber and aluminum construction Ceramic bearing pulleys Titanium hardwAre Rear Derailleur Mount Type, 10x1 Standard Drivetrain Speeds, 11 Cage Length, Short Chain Wrap Capacity (teeth), 33 Weight, 145 Rear Der/Shifter Compatibility, SRAM Exact Actuation Color, Black Largest Cog, 28 keyword search, RD4620