Updated cog design yields more robust shifting and further weight savings Compatible with all 10- and 9-speed Shimano hubsColor Silver Cassette Cogs 11,12,13,14,15,16,17,19,21,23 Speeds 10 Chain Compatibility Shim/SRAM 10 Weight 163 g Intended Use Road Drivetrain Spacing Shimano/SRAM 10 Cassette Body Type Shimano 9/10/SRAM.
Ultegra CS6500Must use 9-speed chainReduced cog spacing: 9-speed is same overall width as 8-speed Aluminum carrier reduces weight and increases rigidity.
HG50 9-Speed Computer designed Hyperglide (HG) sprockets incorporate specifically positioned shift ramps and tooth profiles for improved chain control during shifting. Fast and responsive indexed shifting is the result.Must use 9-speed chain Reduced cog spacing: 9-speed is same overall width as 8-speed.