Sram Red E1 Xg1290 Cassette Golden 12s / 10-28t 12s Rainbow

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 smooth and fast shifting- Gradual gear progression between cogs - at least five one-tooth jumps on 10-28T, 10-30T and 10-33T cassettes - while still offering a wider range- 10-tooth start helps provide a wider gearing range- Designed to work with an XDR driver body- One-piece machined steel X-DOME design for weight savingsSpecifications:- Speed (CS): 12s- Gearing: 10-28t- Cog finish (Cassette): Rainbow- Technology (Cassette): XG- Cog sizes: 10-28t,10,11,12,13,14,15,16,17,19,21,2