SRAM Kassette XG-1270 10-28T, 12-fach silberDesigned for the next generation of drivetrainsand the next generation of riders. The SRAM Force XG 1270 cassette is optimized for electronic shifting and features our X Range gearing technology. Smooth, precise shifts, from 10T on up. Speed (CS): 12s Gearing: 10 26t, 10 28t, 10 33t Cog finish (Cassette): Black, silver Technology (Cassette): XG Cog sizes: 10 26t; 10,11,12,13,14,15,16,17,19,21,23,26, 10 28t; 10,11,12,13,14,15,16,17,19,21,24,28, 10 33t;