Sram Red XG-1290 Cassette - 12 Speed - Silver / 10-30

The workhorse of X-Range gearing. The Sram Red XG-1290 cassette progresses fluidly and quickly through a wider range of gears. It's specifically designed for wireless electronic shifting and the one-piece design offers you the best in weight savings. Features Designed for smooth and fast shifting.. Gradual gear progression between cogs-at least five one-tooth jumps-while still offering a wider range.. 10-tooth start helps provide a wider gearing range.. Designed to work with an XDR driver body.. One-piece machined steel X-DOME design for weight savings.. All Zipp wheels starting from 2012 are XDR ready.. Specification Speed (CS) 12s. Gearing 10-26t, 10-28t, 10-33t. Cog finish (Cassette) Silver. Technology (Cassette) XG.