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 with Shimano 10-speed road Dual Control Levers
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