Shimano GRX RD-RX810

GRX 11 speed rear derailleur for double cranks
Adjustable chain stabilizer prevents chain slapping and drops
Gravel-tuned clutch tension can be toggled ON/OFF to match the terrain
Maximum front difference: 17T
Total capacity: 40T
Low sprocket: Max. 34T/Min. 30T
Top sprocket: 11T