The impact-resistant optimized 12-speed derailleur M9250 with a medium cage is the top choice for Shimano's elite enduro athletes as well as weight-conscious XC racers, especially in combination with the compact cassette 9-45. Equipped with the completely new wireless Di2 shifting, automatic impact compensation, a redesigned wedge shape, and 23 millimeters of additional ground clearance for a bump-free ride, this derailleur stands out for its shifting speed and its ability to keep riders competitive on the trail.