Shimano GRX RD-RX815 Rear Derailleur - 11-Speed, Long Cage, Black, With Clutch, Di2, For 1x and 2x RD0606

The Shimano GRX 11-speed Di2 rear derailleur integrates electronic shifting with silent and uninterrupted rear operation on rough terrain. An adjustable Shimano Shadow RD+ clutch prevents chain slapping and drops.

• For 1x and 2x drivetrains
• Operates with Shimano Di2 for digital electronic shifting
• Gravel-tuned clutch tension provides smooth and reliable mixed surface shifting