Shimano XTR RD-M9120-SGS 12-Speed Rear Derailleur Long Cage MTB IRDM9120SGS
Shimano XTR RD-M9120 is a genuine Shimano rear derailleur delivering precise, reliable shifting for mountain bike riders.
Genuine Shimano XTR, brand new in retail packaging.
Will it fit? This is the 2x12-speed long cage (SGS) version, built for double chainring XTR M9100 drivetrains. Maximum sprocket 45T, total capacity 41T. If you run a 1x setup with a 10-51T cassette you need the RD-M9100-SGS instead.
Key Specifications
Brand | Shimano |
Series | Shimano XTR M9100 |
Model | RD-M9120-SGS |
MPN | IRDM9120SGS |
UPC | 689228880269 |
Type | Rear Derailleur, mechanical |
Speeds | 2x12-Speed |
Cage length | Long cage (SGS) |
Max sprocket | 45T |
Total capacity | 41T |
Pulley teeth | 13T, sealed bearing |
Material | Aluminum / steel |
Weight | 284 g (10.0 oz) |
Color | Black |
Country of Origin | Japan |
Condition | Brand new, original Shimano retail packaging |
Technology Highlights
✓ SHADOW RD+ clutch keeps the chain taut and quiet, cutting chain slap and dropped chains on rough terrain.
✓ Larger 13T sealed bearing pulleys improve chain management and efficiency.
✓ Built for 2x12 drivetrains, 45T max sprocket with 41T total capacity.
✓ Long cage (SGS) handles a wide cassette range.
✓ XTR build quality, Shimano's flagship mountain group.
What's in the Box
1 × Shimano XTR RD-M9120-SGS rear derailleur
Mounting hardware & documentation (as supplied)
Original Shimano retail packaging
Brand new in retail packaging. Ships from Ontario, California (US domestic) · Estimated delivery 3–5 business days · Free 30-day returns.
