XTR Di2 RD-M9250 Long Cage Rear Derailleur

What Our Gearhead® Experts Are Saying:

"I’ve put this derailleur through some gnarly stuff—sharp rocks, muddy drops, and high-speed chatter—and it hasn’t missed a shift. The crash recovery system really works, and the low-profile build just shrugs off hits. It’s fast, clean, and tough as nails."

Shimano’s most advanced rear derailleur yet, the XTR RD-M9250-SGS is designed for riders who push their equipment—and themselves—to the limit. Wireless Di2 shifting combines with Hyperglide+ for instant gear changes no matter the load, while SHADOW ES technology refines chain stability and keeps the derailleur compact and out of harm’s way. Its long cage is ready for 10-51T cassettes, giving us the range we need for big climbs and fast descents.

The new wedge-shaped housing isn’t just sleek—it’s strategic, helping deflect impacts rather than absorb them. A durable carbon cage, reinforced pulleys, and wide-link construction all contribute to trail-tested resilience. And if the worst happens, Automatic Crash Recovery resets the derailleur in real time so we can keep riding without hesitation. This is Di2 made for real mountain riding—fast, tough, and built to adapt.