Shimano CS-9100 Dura-Ace 11-Speed Road Bike Casssette. The Shimano CS-9100 Dura-Ace 11-Speed Cassette is a super lightweight 11-speed HG-EV cassette with a rigid carbon and alloy carrier for excellent shifting even under the most demanding gear changes. Hyperglide EV sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under load. The close ratio gearing allows a more efficient use of energy through finer cadence control. The Shimano CS-9100 Dura-Ace 11-Speed Cassette’s largest sprockets are mounted on lightweight alloy and carbon carriers to reduce weight and the 5 largest sprockets are made from titanium to reduce weight without sacrificing strength. With weight saving drilling and a hard wearing nickel plating, the Shimano CS-9100 Dura-Ace 11-Speed Cassette will see you riding harder and faster for further than ever before. Features: Carbon carrier Titanium and alloy sporckets Cut and drilled design Nickel-plating Alloy cassette lockring For Super Narrow 11-speed HG-EV chains Average weight 175 grams for 11-25 tooth. Titanium and alloy sporckets. Cut and drilled design. For Super Narrow 11-speed HG-EV chains. Average weight 175 grams for 11-25 tooth. Sorry, our items are NOT available for pick-up. No additional information at this time. You might also like. Maxxis Freeride Inner Tube. Cateye AMPP 100 / VIZ 100 Bike Light Set. PNW Components Loam MTB Pedal. Mons Royale Redwood Enduro VLS MTB Jersey.