SRAM X.4 7/8/9-Speed Rear Derailleur Long Cage

Features of the SRAM X.4 7/8/9-Speed Rear Derailleur Long Cage Compatible with 7-, 8-, and 9-speed systems 1:1 shifter-to-derailleur actuation ratio for precise light-action indexing Rear Derailleur Mount Type, 10x1 Standard Cage Length, Long Rear Der/Shifter Compatibility, SRAM 1:1 Largest Cog, 34 Drivetrain Speeds, 9 Chain Wrap Capacity (teeth), 45 Weight, 280 Color, Black