Shimano

Deore XT Di2 RD-M8250 Long Cage Rear Derailleur

What Our Gearhead® Experts Are Saying:

"I’ve ridden both the mid-cage and long-cage versions depending on how light or wide-range I want to go. The shifting is snappy and instant, and with the battery stashed inside the derailleur housing, I never worry about damage on rough terrain. This is XT-level reliability built for wireless life on the trail."

We demand more from our drivetrains—faster shifts, tougher components, and zero compromises on the trail. That’s exactly what the Shimano XT Di2 12-Speed Rear Derailleur delivers. Whether we’re running a light and compact 9–45T cassette for quick climbing or stretching the range to 10–51T for steep descents and long climbs, this derailleur is wired (wirelessly) for precision. The updated SHADOW ES cage design gives us a slimmer, stronger profile with 23mm more ground clearance for fewer hangups in rock gardens and technical terrain.

Reliability isn't just a spec—it’s in every detail. The mid and long cage variants both feature a new impact-deflecting wedge shape, wide-link construction, and a skid-plate design that shrugs off abuse. Automatic Impact Recovery instantly resets derailleur alignment after unexpected hits, while covered pulleys and a fully enclosed battery compartment (battery not included) protect against trail debris and ensure uninterrupted performance. Wireless Di2 shifting keeps our cockpit clean and our focus locked on the ride ahead.