The workhorse of X-Range gearing. The SRAM RED XG-1290 cassette progresses fluidly & quickly through a wider range of gears. Its specifically designed for wireless electronic shifting & the one-piece design offers you the best in weight savings. FEATURES Designed for smooth & 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 SPECIFICATIONSSpeed (CS) 12s Gearing 10-26t 10-28t 10-33t Cog finish (Cassette) Rainbow Silver Technology (Cassette) XGCog sizes 10-26t;101112131415161719212326 / 10-28t;101112131415161719212428 / 10-33t;101112131415171921242833