Shimano GRX RD-RX400 Rear Derailleur

With an integrated chain stabilizer mechanism, the SHIMANO GRX derailleur provides a quieter experience and shifting security and precision on mixed terrain. For rides on smooth surfaces, the derailleur features and ON/OFF switch for the chain tensioner.

GRX 10 speed rear derailleur for double cranks
Adjustable chain stabilizer prevents chain slapping and drops
Gravel-tuned clutch tension can be toggled ON/OFF to match the terrain
Maximum front difference: 16T
Low sprocket: Max. 36T/Min. 30T
Top sprocket: 11T