Shimano XTR M9250 Di2 Wireless Upgrade Kit - Includes M9250-GS Rear Derailleur, M9250-IR I-SPEC EV Shifter, Battery, bag-part Shimano 12 Speed Micro Spline

Shimano 12 Speed Micro Spline Freehub

Fits boost and non-boost hubs

4-piston caliper is designed for tough enduro trails

630 / 27" ISO Width 48

Shimano XTR M9250 Di2 Wireless Upgrade Kit - Includes M9250-GS Rear Derailleur, M9250-IR I-SPEC EV Shifter, Battery, bag-part Shimano 12 Speed Micro SplineRobust. Resilient. Ready for Anything The Shimano XTR Di2 12 Speed Upgrade Kit provides riders with the pinnacle of wireless MTB shifting technology. The kit features an all new XTR M9250 Di2 wireless rear derailleur that's optimized for impact survivability to make it the choice for both Shimano's top enduro athletes and weight conscious XC racers alike. With built in Automatic Impact Recovery, an impact deflecting shape, and simple covered pulley