Shimano GRX RX400 Hydraulic Left Lever with RX400 Flat Mount Brake Caliper 2x10-speed

With the Shimano GRX RX400 Dual Control shifter, chainring changes are fast and precise. It is ideal for cycling on gravel trails as well as on the road. The textured, non-slip brake lever optimises bike control on gravel tracks, whilst comfort is enhanced by the lever’s ergonomic design. This shifter is specifically designed for gravel riding and, in this version, is compatible with 2x10-speed systems.

The Shimano GRX BR-RX400 hydraulic disc brake calipers feature a Flat Mount design with a compact profile, offering perfect braking control on mixed-terrain rides. The GRX brake caliper provides optimal heat dissipation with convenient access for adjustments and bleeding. Wheel changes are also optimised and simplified with the Flat-Mount mounting system.

The Shimano GRX groupset stands out with its Gravel-specific components: Gravel ergonomics, optimised shifting options, reliability, and a quiet, stable drivetrain.

Shimano emphasises that this is not a reworked version of its road components, but rather a groupset specifically adapted to the demands of gravel riding.

Technical specifications:

- Lever and mount ergonomics inspired by gravel riding
- Non-slip brake lever for better bike control
- Gear changes as smooth as with high-end systems
- Flat Mount caliper mounting system
- Convenient access to adjustments with quick and easy bleeding
- Easy wheel replacement
- Shimano part number: IRX400DRRDSC170A
- Model number: ST-RX400-L / BR-RX400-F
- Shimano groupset: GRX 10-speed
- Brake fluid type: mineral oil
- Braking type: hydraulic
- Drivetrain type: mechanical
- Number of gears: double chainring
- Supplied without disc