Shimano XTR RD-M9100 Rear Derailleur 12-speed SGS

RD-M9100 GS Rear Derailleur
The new rear derailleur ensures blazingly quick gear changes and a precisely running chain even for the most aggressive riding. At the same time, due to a reduced pre-set tension and larger 13 t pulley wheels, excessive chain tension is avoided allowing for reduced friction losses. The RD-M9100 SGS is compatible with the new 10-45 and 10-51 cassettes in a 1x11 or 1x12 setup.

Shimano XTR M9100
Built on 27 years of MTB innovations, the new XTR targets the highest demanding XC, Enduro and Marathon riders. Looking to push boundaries, even on those insanely demanding courses nowadays? The new XTR is jam-packed with every advantage you’ll need to get the job done. Heck, it’ll even inspire you to turn yourself inside out while doing it. Shimano's engineers have been working very hard the last 27 years, since they came out with the first ever MTB groupset. The new XTR is solid proof of this. Redesigned from the bottom up, it is by far the most advanced MTB groupset on the market. It’s lighter, smoother, more durable and versatile. It’s also extremely efficient in transferring all pedal-pounding watts into ground speed.