More speeds mean more options. At the heart of every Shimano Dura-Ace 9000 drive train component is the marketing anthem of Rider-Tuned. Shimano means what they say. Every component is designed based on direct rider feedback. The extra time Shimano spends in design in manufacturing saves you time on course. The Shimano Dura-Ace CS-9000 cassette is no exception. <p>The new 11-speed cassettes are available in a range of sizes including a wide-range 11-28 option – one cassette to use all year round. Smooth, fast shifting guaranteed. Hyperglide sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load. Close ratio gearing allows a more efficient use of energy through finer cadence control. Largest sprockets are mounted on a lightweight carbon carrier to reduce weight and increase rigidity.</p>