Rear derailleurs
Shimano Shimano XTR M9100 RD-M9100 Rear Derailleur
Mechanical 1x12 · SGS · 10-51T
Compatibility: reviewed
Known specifications can be used by the compatibility engine.
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Catalog trust
Evidence and freshness
Technical-source dates and retailer offer checks are separate. A retailer check does not validate compatibility.
Report a correction- Technical review
- Aug 13, 2026
- Compatibility review
- Reviewed Aug 13, 2026
Approved technical sources
- Shimano MTB rear derailleur specificationsManufacturerSource checked Jul 31, 2026Evidence reviewed Aug 13, 2026
- Shimano MTB rear drivetrain compatibility C-433ManufacturerSource checked Jul 29, 2026Evidence reviewed Aug 13, 2026
- Shimano current MTB component ordering catalogManufacturerSource checked Jul 29, 2026Evidence reviewed Aug 13, 2026
Technical data
Specifications
- Speeds
- 12-speed
- Supported speeds
- 12-speed
- Maximum cassette cog
- 51T
- Smallest cassette cog
- 10T
- Supported cassette combinations
- 10-51t
- Supported front chainrings
- 1
- Maximum front difference
- 0T
- Drivetrain family
- Shimano XTR M9100 mechanical 12-speed
- Compatible chain families
- Shimano HG 12-speed
- Shift actuation
- Mechanical
- Frame mounting
- Conventional hanger
- Total capacity
- 41T