Silky smooth gear changes are characteristic of each Dura Ace group. The cassette control for this überragendem shift feel in a substantial part. Designed exclusively for the chain tooth shapes and switching aids a gear change can be described almost as a sliding of the chain between different gears.
As a technical high-Light cartridge provides 6 small steel pinions for high durability and 5 larger pinion made of titanium, as well as an ultra-light aluminum spider for minimum weight. Due to the different load on the small and large sprocket large titanium sprocket wear just as slow as the smaller steel pinion. With the new, freely selectable by the driver polls the DURA-ACE CS-R9100 allows a tunable to your riding style and the intended use your ballot combinations. The lightweight 11-speed cassettes are in different pinion combinations, including the new 11-30 teeth version available. Fast, precise and smooth shifting is guaranteed in all situations.