Affordable and reliable derailleur is great for repairs and upgrades. - 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 Specification:- - Color: Black - 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