SRAM XX SL Eagle T-Type XS-1299 Cassette - 12-Speed 10-52tThe XX SL Eagle T Type 12 Speed 10 52t cassette is a major reason why Eagle Transmission offers one of the best ever inboard and outboard shifting performance under load. Thanks to its full X SYNC design, the harder you pedal, the better it shifts. This is the lightest Eagle cassette SRAM has made, as well as, their our most precise and long lasting. Its new gen features a fully machined, hardened steel X Dome architecture for gears 1 9 and an ultra