Shimano GRX Rear Deraileur (RD-RX812)

Sale price Price $125.00 Regular price Unit price  per 

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.



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


  • 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


*Info And Images From Shimano