Evo SRAM XX Eagle Transmission XS-1297 12-Speed Cassette

The harder you pedal, the better the XX Eagle Transmission XS-1297 12-Speed shifts. Built with a full X-Sync design that's engineered to be interdependent on other Eagle components, the XX features improved gear progression 44 and 38 tooth cogs in the low end, and square teeth that last longer and deliver more precise shifting.