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.