
The revolutionary machined design of the Sram XX 10 Speed Cassette uses the same gruelling manufacturing techniques that produced the Power Dome road cassette. With X-Dome, eight of the cogs are CNC-machined together out of a single block of billet steel, creating an incredibly lightweight, precise & strong cassette. The process takes 9 hours per cassette! You have never seen a cassette that looks like this. The open design aids in mud clearance, giving you cleaner shifting performance & longer component life. The four most innovative brands in cycling have come together behind one singular goal: to craft the most advanced Cross Country group ever. XX was a project that covered two years & thousands of hours, spanning 6 countries on three continent's. It took the product & design expertise of Sram shifting, Avid braking, Rock Shox suspension & Truvativ engineering working united as one to create the lightest, most technically advanced group conceivable. This is XX.