TheShimanoDura Ace 9100 11-Speed Cassette11-30Tis 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...
Best Price: £249.99 from Leisure Lakes Bikes