The 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 DH Transmission might just be the difference between qualifying and going home. Available in two variants XD and XD SLIM to optimize for different hub dimensions.Full X-Sync tooth profile for best-ever inboard and outboard shifting performance under loadOptimized 7-speed 10-24t gear steps optimized specifically for DHT-Type chain compatibility only (Sold separately)