Shimano CS-HG800 11-Speed CassetteShimano CS HG800 11 Speed Cassette Lightweight 11 speed HG EV cassette with rigid alloy sprocket carrier for reduced weight and better shifting performance, even under the most demanding gear changes. Features: Hyperglide EV sprockets have been designed to reduce weight with improve teeth shaping providing accurate shifting and reduced wear Wide gear range to meet the demands of all types of rider Can be used on narrower MTB freehubs when used without