The Shimano GRX RD-RX810 11-Speed Rear Derailleur brings mountain bike technology to the road with a clutch equipped rear derailleur for smooth shifting on rough roads. Due to the integrated Shadow RD Technology with its race-proven low profile design the derailleur is more compact and fits closer to the frame ensuring less damage in a crash. The adjustable chain stabilizer prevents chain slapping and drops with the gravel-tuned clutch tension providing silent and uninterrupted rear shifting on rough terrain.