OneUp Components 42T Sprocket+16T Kit for SRAM & Shimano 10 Speed Cassettes Increase your 11-36 cassette range by 17% to get a 1x10 drivetrain ready for the mountains Compatible with most SRAM and Shimano 2x10 and 3x10 speed drivetrains 16T steel sprocket provides more even cassette progression for smoother cadence and improved shifting Typical 3x to 1x system weight decrease of 367g Sprocket material: 7075-T6 (40T/42T), Chrome plated hardened steel, (16T) Sprocket weight: 18g (16T), 71g (42T)