Shimano GRX RD-RX812 11sp Rear Derailleur

Shimano GRX RD-RX812 11sp Rear Derailleur

Regular priceCA$159.99

SHIMANO GRX - Rear Derailleur - SHIMANO SHADOW RD+ - 42T max low sprocket - 11-speed

With an integrated chain stabilizer mechanism, the SHIMANO GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON/OFF switch for the chain tensioner. 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
  • Switch stabilizer ON/OFF to match the terrain
  • Gravel-tuned clutch tension

Compatible with current road DUAL CONTROL LEVER
Top sprocket: Max. 11T/Min. 11T
Low sprocket: Max. 42T/Min. 40T
Total capacity: 31T


  • SERIES GRX 11-speed
  • Color Series color
  • Average weight 267
  • Rear speeds 11
  • Compatible chain LINKGLIDE, HG 11-speed
  • Top-normal spring type|SHIMANO SHADOW RD+
  • Mount|Direct attachment (conventional)
  • Mount|Direct mount
  • Cable adjuster
  • Total capacity 31T
  • Low sprocket|Max. 42T
  • Low sprocket|Min. 40T
  • Top sprocket|Max. 11T
  • Top sprocket|Min. 11T
  • Fluoric coated link bushings 4
  • Pulley|Guide pulley bearing
  • Pulley|Tension pulley bearing
  • Pulley|Teeth 11T
  • Pulley|Sunken type pulley screw
  • B-axle|Hollow axle

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