Shimano GRX RD-RX817 Rear Derailleur - 11-Speed, Long Cage, Black, With Clutch, Di2, For 1x

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.

Specifications:

• Rear Derailleur Mount Type: Shimano Rear Direct Mount
• Rear Der/Shifter Compatibility: Shimano Road Di2
• Cage Length: Long
• Drivetrain Speeds: 11
• Weight: 318
• Color: Black
• Chain Wrap Capacity (teeth): 31
• Largest Cog: 42