Pinion unit for the Shimano Dura Ace CS-9000 and CS-R9100 -11-speed road bike cassette with the gradations of 11-28 and 12-18 teeth. The individual pinions are 19, 21 and 23 teeth are made of titanium.
Scope of delivery
- Y1YC98140 pinion unit with 19-21-23 teeth








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