The Shimano GRX 11-speed rear derailleur has an integrated chain stabilizer mechanism that provides a quieter experience shifting security and precision on mixed terrain. For rides on smooth surfaces the derailleur features an ON/OFF switch for the chain tensioner. The Shimano Shadow RD+ adjustable chain stabilizer provides silent and uninterrupted rear shifting on rough terrain.Adjustable Shimano RD+ chain stablizer prevents chain slapping and drops Gravel-tuned clutch tension provides smooth and reliable mixed surface shifting Compatible with Shimano road Dual Control Levers Compatible with Shimano LinkGlide and HG 11-speed chains
| Largest Cog | 34, 42 |
| Color | Black |
| Rear Der/Shifter Compatibility | Shimano Road |
| Rear Derailleur Mount Type | 10x1 Standard |
| Drivetrain Speeds | 11 |
| Weight | 255, 267 |
| Chain Wrap Capacity (teeth) | 31, 40 |
| Cage Length | Long |
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