Shimano GRX RD-RX400 Rear Derailleur - 10-Speed, Long Cage, Black, With Clutch

GRX RD-RX400 Rear Derailleur 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