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