Pinion unit for the Shimano Dura Ace CS-9000 and CS-R9100 – 11-speed road bike cassette with a gradation of 12-25 teeth. The number of teeth of the three pinions are 18, 19 and 21 teeth and are made of titanium.
Scope of delivery
- Y1YC98150 pinion unit with 18-19-21 teeth








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