The Shimano GRX RD-RX400 10-speed rear derailleur keeps shifting silent and uninterrupted when riding on rough terrain.

• A Shadow RD+ chain stabilizer prevents chain slapping and drops
• The gravel-tuned clutch tension helps to provide smooth and reliable mixed surface shifting
• Stabilizer can be turned on/off to match terrain
• Compatible only with 10-speed ST-RX400, ST-4700, ST4720, ST-4725, ST-RS405 and SL-4700 shift levers
• Rear Derailleur Mount Type: Shimano Rear Direct Mount
• Rear Derailleur Mount Type: 10×1 Standard
• Rear Der/Shifter Compatibility: Shimano Road
• Cage Length: Long
• Drivetrain Speeds: 10
• Weight: 303
• Color: Black
• Chain Wrap Capacity (teeth): 41
• Largest Cog: 36