Shimano XTR RD-M9250-SGS Di2 Wireless Rear Derailleur - 12-Speed, Long Cage, Shadow ES, Black/Gray

The Shimano XTR Di2 Rear Derailleur (RD-M9250-SGS) is a 12-speed wireless mountain bike derailleur built for technical trail riding and racing. It runs on Shimano's Di2 electronic shifting platform paired with HYPERGLIDE+ technology, delivering instant, precise shifts at the push of a button. The long cage (SGS) design accommodates a 10-51T cassette range, giving riders the gear spread needed for steep climbs without sacrificing top-end performance.

Shimano engineered the M9250 to take abuse. The wedge-shaped body deflects direct rock strikes rather than absorbing them head-on, and the Automatic Impact Recovery function electronically resets the derailleur to its home position after an impact. A wide link structure, carbon reinforcement plate, and solid pulleys add structural integrity throughout. The SHADOW ES chain stabilizer keeps the drivetrain quiet and controlled on choppy terrain.

The battery mounts in an enclosed, protected position that resists movement on rough ground while staying fully removable for charging. Direct mount attachment (conventional) keeps installation straightforward on compatible frames. The long cage configuration and wireless Di2 platform make the RD-M9250-SGS a natural fit for enduro and all-mountain builds where range and reliability are non-negotiable.