SRAM Force XG-1270 12 Speed CassetteSRAM FORCE XG 1270 CASSETTE No matter what your aspirations or ride styles are, Force has you covered. Customize your drivetrain for your needs with 12 speeds offered in a 10 28T, 10 30T, 10 33T or 10 36T range. Pair with any of our chainrings for your dream gearing setup. SPECIFICATIONS Speed (CS) 12 Gearing 10 28t, 10 30t, 10 33t, 10 36t Cog finish (Cassette) Silver Technology (Cassette) XG Cog sizes 10 28t; 10,11,12,13,14,15,16,17,19,21,24,28, 10