12-speed, CNC machined steel, suitable for XDR freehub body Number of teeth 10, 11, 12, 13, 15, 17, 19, 21, 24, 28, 32, 36 Item Type Cassette Freehub body XDR Large sprocket 36 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 gear selection. 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: 10,11,12,13,15,17,19,21,24,28,32,36 Designed for smooth and fast shifting A wide range and small steps Designed for use with an XDR body X-Dome; manufactured from one piece Sram Article number: Retail packaging: Yes