Shimano Dura Ace 9100 11-Speed Cassette 12-28T

TheShimanoDura Ace 9100 11-Speed Cassette12-28Tis a super lightweight 11-speedHG-EVcassette with a rigid carbon and alloy carrier for excellent shifting. ShimanoDura Ace 9100 11-Speed Cassette Features Super lightweight 11-speedHG-EVcassette with a rigid carbon and alloy carrier for excellent shifting even under the most demanding gear changes HyperglideEVsprockets 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 lightweight alloy and carbon carriers to reduce weight and increase rigidity 5 largest sprockets are made from titanium to reduce weight without sacrificing strength Sprockets are extensively cut away and drilled to further reduce weight without reducing rigidity Nickel-plated finish offers hard wearing resistance to corrosion Alloy cassettelockring For Super Narrow 11-speedHG-EVchains Average weight 175 grams for 11-25 tooth