The Shimano GRX 11-speed rear derailleur provides silent and uninterrupted rear shifting on rough terrain. An adjustable Shimano Shadow RD clutch prevents chain slapping and drops.

Specifications:

• Rear Derailleur Mount Type: Shimano Rear Direct Mount
• Rear Derailleur Mount Type: 10x1 Standard
• Rear Der/Shifter Compatibility: Shimano Road
• Cage Length: Long
• Drivetrain Speeds: 11
• Weight: 267
• Color: Black
• Chain Wrap Capacity (teeth): 31
• Largest Cog: 42