Thunder Mountain Bikes
XTR RD-M9100 Rear Derailleur
- Thunder Mountain Bikes$277.20Buy
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From Thunder Mountain Bikes
The XTR M9100 derailleur brings a new level of drivetrain silence thanks to decreased tension in the low gear position and an added bumper on the pulley cage. Larger 13T pulleys increase efficiency and chain management while compatibility with Shimano&';s new 12-speed cassettes boosts range.