The Shimano GRX RD-RX400 rear derailleur brings SHIMANO SHADOW RD+ technology to 10-speed gravel drivetrains for quiet, secure shifting on mixed terrain.
- 10sp compatible with current SHIMANO 10-speed road DUAL CONTROL levers
- SHIMANO SHADOW RD+ integrated chain stabilizer with ON/OFF switch
- Wide-range front gearing support, maximum front T difference: 16T
- Total capacity: 41T

