Shimano GRX RD-RX822 12-Speed Rear Derailleur

Shimano GRX RD-RX822 12-Speed Rear Derailleur

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Enhanced chain security and quieter shifting for gravel riding.

With its integrated chain stabilizer, the SHIMANO GRX rear derailleur delivers quieter shifting, better ground clearance and more secure chain management in rough terrain. The RD-RX822-GS is compatible with 10-45T, 12-speed SHIMANO MTB cassettes, and the chain tensioner has an ON/OFF switch for easy wheel removal.


  • Silent and secure rear shifting on rough terrain
  • Adjustable chain stabilizer prevents chain slap and drops
  • Smooth and reliable shifting on mixed surfaces
  • ON/OFF stabilizer switch matches terrain
  • Top sprocket: Max. 10T/Min. 10T
  • Low sprocket: Max. 45T/Min. 45T
  • Total capacity: 35T
  • Interchangeable, replaceable GS/SGS derailleur cage