Shimano has got the 11-speed gig nailed. They've thought of absolutely everything when it comes to optimizing performance. And that includes their superbly awesome CS-9000 cassette. Available in a range of options, including the wide-range 11-28 version, the CS 9000 cassette is Rider-Tuned with close ratio gearing to deliver crisp, smooth shifts for every rider, every time. Not only that, it's lighter than ever and takes advantage of both carbon and titanium to cut weight to an absolute minimum with no compromise in performance.
Hyperglide sprockets feature computer-designed tooth configuration with contoured shift gates for a smooth, precise shift even under load
Carbon mid spider carrier reduces weight and adds rigidity
Titanium sprockets (16T and bigger) shave grams
Close ratio 11-speed gearing improves cadence for better energy transfer
Compatible with Shimano 11-speed freehub bodies only, check wheel manufacturer's specs to confirm 11-speed compatibility
Shimano Dura-Ace CS-9000 11-Speed Cassette
Top five cogs--titanium; Bottom six cogs--steel, Nickel-plated finish; Carbon mid-spider carrier