Shimano GRX RD-RX812 Rear Derailleur - 11-Speed Long Cage BLK With Clutch For 1x 42t Low Sprocket Max

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.Adjustable Shimano RD+ chain stablizer prevents chain slapping and dropsGravel-tuned clutch tension provides smooth and reliable mixed surface shiftingCompatible with Shimano road Dual Control LeversCompatible with Shimano LinkGlide and HG 11-speed chains