12-speed, CNC steel construction, suitable for XDR freehub body Number of teeth 10, 11, 12, 13, 14, 15, 17, 19, 21, 24, 28, 33 Type Article Cassette mount XDR freehub body Large sprocket 33 T. Main color silver Small sprocket 10 T. Secondary color black Replaceable sprockets no System compatibility 12-speed Technology X-Dome A wide range and small steps: the Sram XG1290 offers both! This lightest and super durable cassette breaks new ground in terms of gear choices. The four different cassette options are specially designed for electronic shifting and available from a 10-28T option for road racing to an all-road setup with a 10-36T. 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: 10,11,12,13,15,17,19,21,24,28,32,36Designed for smooth and fast shiftingA wide range and small stepsDesigned for use with an XDR bodyX-Dome; manufactured from one pieceSram Article number: Shop packaging: Yes