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Brand- Shimano
Hard Gearbox Ace RD-R9100 11V
Dura Ace 9100 rear gearbox completely redesigned, now of the "Shadow" type inspired by MTB technologies. The 11-speed Dura Ace gearbox has been redesigned to be lighter and faster with the help of friction- basso polymer-coated cables. This new derailleur also features direct mounting, offering both a stiffer base for improved shifting and minimising the chances of chassis damage in the event of a fall.