Shimano GRX 812 Rear Derailleur - 11 Speed
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Shimano GRX 812 Rear Derailleur - 11 Speed
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Code: RD-RX8
Shimano GRX 812 Rear Derailleur - 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. 
  • Adjustable chain stabilizer prevents chain slapping and drops
  • Switch stabilizer ON/OFF to match the terrain
  • Gravel-tuned clutch tension
  • Compatible with current road Dual levers
  • Top sprocket: Max. 11T/Min. 11T
  • Low sprocket: Max. 42T/Min. 40T
  • Total capacity: 31T
  • Smooth and reliable mixed surface shifting
Phil Excellent rear mech which is compatible with the largest of cassettes. Feels like superb shimano quality which is reassuring for the type of riding I do.
David Fits perfectly with M7000 11-42 cassette for some great climbing
JC What a difference compared to the Sram derailleur I had on there. Chain retention is spot on.