Shimano GRX Hydraulic Disc Brake Set BL-RX600/BR-RX400 For 1x (Left/Front)

Shimano GRX Hydraulic Disc Brake Set, BL-RX600/BR-RX400, For 1x System (Left/Front)

A central concern of Gravel riders is a reliable braking system with sufficient power reserves, the Shimano GRX disc brake lever BL-RX600 with BR-RX400 Flat-Mount caliper for hydraulic disc brake is characterized by excellent deceleration performance to maintain control on steep, demanding or even surprising descents.

Shimano GRX BL-RX600-L disc brake lever

The Shimano GRX BL-RX600-L provides Gravel inspired ergonomics both for the bracket design to accommodate every kind of drop bar and for the lever itself featuring an anti-slip coating for greater mixed-terrain control. In order to meet the individual needs of the driver, the hydraulic brake lever offers a tool-based reach adjustment as well.

Shimano GRX BR-RX400 disc brake caliper

Never hesitate to tackle rough surfaces with the hydraulic Shimano GRX BR-RX400 caliper. In doing so Ice Tech ensure excellent heat dissipation while the BR-RX400's 2 pistons guarantee solid braking performance under all conditions. The Flat Mount system makes it possible to attach the disc brake caliper directly at frame or fork. Trouble-free and simple maintenance is provided by the proven One Way Bleeding concept and the Easy Hose Joint System which simplifies brake hose exchanges.

Key Features

• Brake System: Hydraulic disc brake for powerful and consistent braking

• Lever Model: Shimano GRX BL-RX600 hydraulic brake lever

• Caliper Model: Shimano GRX BR-RX400 flat-mount caliper

• Compatibility: Designed for gravel bikes with 1x drivetrain systems

• Heat Management: Ice Tech technology improves heat dissipation during braking

• Piston Design: Dual-piston caliper for reliable braking performance

• Lever Grip: Anti-slip coated brake lever for improved control

• Adjustability: Tool-based reach adjustment for personalized lever positioning

• Mount Type: Flat Mount system for clean frame and fork integration

• Maintenance: One Way Bleeding system for easy and clean servicing

Product Specifications

• Brand: Shimano

• Series: GRX

• Lever Model: BL-RX600-L

• Caliper Model: BR-RX400

• Brake Type: Hydraulic Disc Brake

• Piston Count: 2 Pistons

• Mount Type: Flat Mount

• Position: Left / Front

• Lever Adjustment: Tool-based reach adjustment

• Technology: Ice Tech heat management

• Bleeding System: One Way Bleeding

• Hose Connection: Easy Hose Joint System

Braking Performance for Gravel Riding

Gravel riding demands strong and predictable braking in constantly changing terrain. The Shimano GRX brake system is engineered to provide excellent stopping power with smooth modulation, allowing riders to control speed precisely on loose gravel, dirt roads, and steep descents. The dual-piston caliper ensures balanced braking pressure, while Shimano’s Ice Tech technology helps manage heat buildup during extended braking. This results in stable performance even during demanding rides. The anti-slip brake lever improves grip in wet, muddy, or dusty conditions, giving riders confidence and control on mixed surfaces.

Easy Operation / Usage

• Simple Setup: Flat Mount design allows easy installation on compatible frames and forks

• Quick Wheel Replacement: Caliper design supports convenient wheel removal and installation

• Easy Maintenance: One Way Bleeding simplifies brake fluid maintenance

• Hose Replacement: Easy Hose Joint System allows quick and clean hose changes

Why Choose This Product

• Designed specifically for gravel riding conditions

• Powerful and consistent hydraulic braking performance

• Excellent heat dissipation for stable braking on long descents

• Ergonomic lever design for comfort on drop-bar bikes

• Anti-slip lever surface for better control on rough terrain

• Easy maintenance and reliable Shimano engineering

In the Box

• Shimano GRX BL-RX600 Left Brake Lever

• Shimano GRX BR-RX400 Front Brake Caliper

• Hydraulic Brake Hose

• Mounting Hardware