Wide range and tight jumps? Why not both? Our lightest, most durable cassette breaks new ground for gearing choices as well. Four distinct cassette options, including our first 10-30T and 10-36T RED cassettes, each provide secure shift ramps specifically designed for electronic shifting, whether racing road on a 10-28T or creating an all-road setup with a 10-36T. Carefully chosen tooth jumps keep you in the right gear when you're out of the saddle on steep climbs and making fine changes to hold a wheel while approaching a sprint.Features : Designed for fast, smooth gear changes. Gradual progression between sprockets - at least five one-tooth jumps on the 10-28T, 10-30T and 10-33T cassettes - while offering a wider range. The 10-tooth start makes it possible to extend the speed range. The 10-30T and 10-36T options are available in RED for the first time. Designed to work with an XDR pilot body. One-piece machined steel X-DOME design for reduced weight.Cog sizes : 10-28T: 10, 11, 12, 13, 14, 15, 16, 17, 19, 21, 24, 28. 10-30T: 10, 11, 12, 13, 14, 15, 17, 19, 21, 24, 27, 30. 10-33T: 10, 11, 12, 13, 14, 15, 17, 19, 21, 24, 28, 33. 10-36T: 10, 11, 12, 13, 15, 17, 19, 21, 24, 28, 32, 36.