Shimano
Shimano GRX RD-RX812-GS Rear Derailleur | 11-Speed 1x Gravel RD | OE
Shimano GRX RD-RX812-GS Rear Derailleur | 11-Speed 1x Gravel RD | OE
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Shimano GRX RD-RX812-GS Rear Derailleur - 11-Speed (1x11)
The Shimano GRX RD-RX812-GS is the ultimate gravel rear derailleur, engineered for 1x11-speed drivetrains. It features the Shadow RD+ clutch mechanism to ensure silent, stable, and precise shifting on the roughest terrain, whether you're racing gravel or on a multi-day bikepacking trip.
Technical Specs
| Feature | Details |
| Model Number | RD-RX812-GS |
| Series | SHIMANO GRX 11-speed |
| Speed | 11-Speed (1x Setup Only) |
| Max Low Sprocket | 42T (MTB-Range Compatibility) |
| Min Low Sprocket | 40T |
| Total Capacity | 31T |
| Chain Stability | Integrated Shadow RD+ Clutch |
| Weight | Approx. 267g |
Installation Note for OE
This is the OE version (Original Equipment), sourced in bulk and supplied in protective industrial packaging rather than a retail box.
Pro Tip: This derailleur is strictly for 1x single chainring configurations. Ensure your B-limit screw is properly adjusted to accommodate the 40T-42T cassette for the smoothest shifting performance.
What’s in the Box?
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1x Shimano GRX RD-RX812-GS Rear Derailleur
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Note: Does not include the retail box.
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