GRX RD-RX810/RX812 11-Speed Rear Derailleurs

The Shimano GRX 11-speed rear derailleur has an integrated chain stabilizer mechanism, that provides a quieter experience, shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features an ON/OFF switch for the chain tensioner. The Shimano Shadow RD+ adjustable chain stabilizer provides silent and uninterrupted rear shifting on rough terrain.

• Toggle clutch on/off to match the terrain
• For 1x and 2x drivetrains
• 34t low sprocket max / 11t top sprocket max