Aizmugurējie zobratu blok Shimano DURA-ACE CS-R9100 11-speed

The DURA-ACE groupset is the result of Shimano's ongoing passion for technology. This is reflected in every single component in the groupset. All components are joined together to work as one, reinforcing each other for unparalleled performance. This is how DURA-ACE achieves ultimate supremacy. Gears to match your riding style as well as your chosen terrain with Shimano's new rider-tuned cassette sprockets. The new lightweight titanium 11-speed cassettes are available in various sprocket combinations, including the new 11-30T version. Fast, accurate and smooth shifting is guaranteed in all situations. Materials: Spider Arms: CFRP (Carbon Fibre Reinforced Polymer) and Alloy; Sprockets: Alloy and 5 Titanium sprockets for lightweight performanceHyperglide EV sprockets have a computer designed tooth configuration with contoured shift gates, resulting in a crisp smooth shift even under loadClose ratio gearing allows a more efficient use of energy through finer cadence controlLargest sprockets are mounted on lightweight alloy and carbon carriers to reduce weight and increase rigidity5 largest sprockets are made from titanium to reduce weight without sacrificing strengthSprockets are extensively cut away and drilled to further reduce weight without reducing rigidityNickel-plated finish offers hard wearing resistance to corrosionAlloy cassette lockringWeight: 175g (11-25T), 193g (11-28T), 189g (12-25T), 205g (12-28T)Art. Nr.: ICSR910011125, ICSR910011128, ICSR910011225, ICSR910011228