The SRAM XG-1290 E1 10-28T cassette is SRAM’s lightest, most durable 12-speed road cassette, engineered for smooth, precise electronic shifting. Its one-piece machined steel X-DOME design reduces weight while maintaining strength, and the tight 10-28T range with at least five one-tooth jumps ensures seamless gear transitions. Optimized for XDR driver bodies and compatible with both 1× and 2× drivetrains, it weighs just 180 g and delivers consistent performance across varied road conditions.

• Speed: 12-speed
• Gear range: 10–28 teeth
• Tooth progression: at least five consecutive one-tooth jumps
• Design: one-piece machined steel X-DOME
• Driver body: XDR only
• Compatibility: 1× and 2× road drivetrains
• Material: high-strength steel
• Weight: 180 g