Shimano GRX RX810 Rear Derailleur 1x11-speed or 2x11-speed

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  • Regular price $209.95 CAD
  • Will be in stock after
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Shimano GRX is a gravel specific components group with gravel optimized gearing options and rugged reliability. Not a modified set of road components, it was designed from the ground up as a gravel specific groupset. GRX eliminates any excuses urging you to try that rough sidetrack or ride that little bit longer. It offers you the option to Explore Beyond!

The integrated chain stabilizer mechanism on the new SHIMANO GRX derailleur makes for a quieter ride while delivering precise, fast and reliable shifting on all types of terrain. For rides on smooth surfaces, the derailleur features and ON/OFF switch for the chain tensioner.

The RD-RX810 rear derailleur is compatible with road cassettes with a 34T low sprocket max.

The RD-RX812 rear derailleur is compatible with MTB cassettes with a 42T low sprocket max.

  • Silent and uninterrupted rear shifting on rough terrain
    • Adjustable chain stabilizer prevents chain slapping and drops
  • Smooth and reliable mixed surface shifting
    • Toggle clutch ON/OFF to match the terrain
    • Gravel-tuned clutch tension
  • Compatible with current road DUAL CONTROL LEVER


  • Maximum front difference: 17T
  • Top sprocket: Max. 11T/Min. 11T
  • Low sprocket: Max. 34T/Min. 30T
  • Total capacity: 40T


  • Top sprocket: Max. 11T/Min. 11T
  • Low sprocket: Max. 42T/Min. 40T
  • Total capacity: 31T