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The Shimano XTR RD-M9100 Rear Derailleur has been upgraded from 11-speed to 12-speed and has the capacity to go up to a 51 tooth cog on the rear. The RD-M9100 is designed for 1x12 drivetrains and comes in GS (short cage) and SGS (long cage).
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The new XTR RD-M9100 Rear Derailleur is specifically optimized for Shimano's new wide range cassettes, and features several updates that ultimately lead to smoother and quieter drivetrain operation.
This is Shimano's XTR M9100 Rear Derailleur. The extra cog of 12 speed gives you more range and allows for smaller jumps between cogs to help you find the right gear. Features: Available in two cage sizes. The medium cage provides 28mm of extra ground clearance.
The pinnacle of MTB technology. Designed for the demands of professional racing at the highest level, XTR is the choice of champions in XC and Enduro.
4.8 out of 5. The latest Shimano flagship, XTR the RD-M9100-SGS derailleur is for 1x12s, 10-51T configuration. It goes without saying that this one has it all. The ultimate, the pinnacle, the XTR derailleur packs all of Shimano's 27+ years of innovation into the lightest possible package.
The Shimano XTR RD-M9100 12-speed rear derailleur features an elegant yet aggressive angled design and an attractive anodised aluminium surface. The derailleurs feature bigger 13-tooth pulleys and include Shimano’s proven Shadow RD+ low profile technology.