Easily tackle everything from fast flats to hills with the 2-25 tooth gear ratio Hardened steel cogs are specially treated for improved wear resistance Compatible with narrow 8-speed HG chains Cog cutaways reduce weight without sacrificing strength or rigidity Computer designed tooth profiles serve up smooth, precise gear changes even under load Claris HG50 cassettes ensure a durable and low maintenance system that's easy-to-operate, with accurate and light-action shifting for Shimano 8-speed drivetrains. Nickel plated finish for corrosion resistanceSteel lockring Item SpecificationsWeight323Cassette Body TypeShimano/SRAM 8, 9, 10 SpeedCassette Cogs12-13-15-17-19-21-23-25Range12-25Drivetrain Speeds8