SRAM XX Downhill XS-797 T-Type Cassette - 7-Speed, 10-24t, For XD Slim Driver, SilverThe XX DH Transmission cassette is designed to deliver small steps for big power. With a full X Sync tooth profile, the 7 Speed DH specific cassette is the best shifting, most robust DH cassette SRAM has ever made. And just like Eagle Transmission, shifting under load isn't just possible, it's better. This allows you to never let up when dropping gears, letting you get to the next split quicker than your competition. And when milliseconds matter, XX