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Mountain Derailleurs - Rear

Shimano XTR RD-M9050 Di2 Rear Derailleur


Shimano's XTR M9050 Di2 rear derailleur delivers unrivaled chain control and shift performance that doesn't degrade over time. Electronic shifting means there are no mechanical cables to settle, stretch or corrode greatly simplifying long term maintenance. With Shimano Shadow RD+ clutch technology, the RD-M9050 shifts perfectly and can be adjusted for the perfect chain tension.

Its bike hugging profile is narrower than ever, helping you squeeze through tight sections without worry of damage. A refined geometry augments Shimano's already legendary performance stability while system communication with the front derailleur makes Shimano Synchronized Shift (front and rear shifts via one right shifter) a possibility.

Select the GS medium cage version for single/double setups and the SGS long cage for use with triple cranks and wide range doubles.


  • Instantaneous shift response to rider input
  • Seamless gear changes
  • Shimano Synchronized Shift compatible
  • System communication with front derailleur
  • Advantage in all conditions
  • E-tube electric wire transmission guarantees stable performance
  • Lowest profile rear derailleur ever produced by Shimano avoids trail obstacles
  • 1x, 2x and 3x compatible with GS and SGS cage options