12-speed, CNC steel construction, suitable for XDR freehub body Number of teeth 10, 11, 12, 13, 14, 15, 16, 17, 19, 21, 24, 28 Type Item Mount Cassette Freehub body XDR Large sprocket 28 T. Main color silver Small sprocket 10 T. Secondary color black Sprocket interchangeable 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 gear selection. The four different cassette options are specially designed for electronic shifting and are 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: 10,11,12,13,15,17,19,21,24,28,32,36 Designed for smooth and fast shifting A wide range and small steps Designed for use with an XDR body X-Dome; manufactured from a single piece Sram Article number: Retail packaging: Yes