Affordable and reliable derailleur is great for repairs and upgrades. FEATURES : Will work with 7, 8 or 9 speed cassettes, depending on the shifter used 1:1 shifter-to-derailleur actuation ratio for precise light-action indexing SPECS : Largest Cog: 34 Rear Derailleur Mount Type: 10x1 Standard Chain Wrap Capacity (teeth): 45 Cage Length: Long Rear Der/Shifter Compatibility: SRAM 1:1 Drivetrain Speeds: 7 , 8 , 9 Weight: 272