Shimano GRX 810 11-Speed Rear Derailleur


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Offering silent, stable rear shifting on rough terrain, the gravel bike–specific Shimano GRX 810 11-speed rear derailleur is compatible with 1x and 2x drivetrains and 11- to 34-tooth cassettes.


  • With a 40-tooth total capacity, the GRX 810 11-speed rear derailleur handles an 11-tooth top sprocket and 30- or 34-tooth low sprocket; maximum front difference of 17 teeth
  • 11-speed SHADOW RD+ system features a clutch and chain stabilizer that can be switched on or off to match terrain
  • Switch gravel-tuned clutch on to increase chain tension and reduce unwanted derailleur cage movement on rough surfaces (for easier rear wheel removal, switch clutch off)
  • Switch adjustable chain stabilizer on to reduce chain slap, improve chain retention and make riding over uneven surfaces quieter
  • Compatible with current road dual control (brake/shift) levers (not included)
  • Designed for use with Shimano HG-EV 11-speed or HG-X11 chains (not included)


View the Shimano GRX Product LineView all Shimano Rear Derailleurs

Technical Specs

Best Use

Road Cycling

Derailleur Type


Cage Length

Short Cage

Max Rear Cog Size





255 grams

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