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It's specifically designed for wireless electronic shifting and the one-piece design offers you the best in weight savings.
The revolutionary machined design of the X-DOME™ cassette uses the same grueling manufacturing techniques that produced the PowerDome™ road cassette. With X-DOME™, nine of the cogs are CNC machined together out of a single block of billet steel, creating an incredibly lightweight, precise and strong cassette.
The XDR™ driver body is a universal mounting system for cassettes that incorporate cogs with fewer than 11 teeth. It allows for lighter and more versatile drivetrains without requiring new rear axle standards, cassette tools or hub redesigns. The XDR™ interface is 1.85mm longer than XD™ and is designed for road hub applications. XDR™ driver bodies are compatible with all XD™ cassettes when the cassette is installed with a 1.85mm spacer.
Road bikes are faster and more capable than ever before, and riders are expanding what’s possible with drop bar bikes. X-Range™ is gearing for today’s road riding. We completely reimagined road gearing for wider range, more useful and smoother gear progression, as well as smarter shift settings—enabled by AXS™. With X-Range™, you’re always in the right gear.