FEATURES of the Shimano GRX ST-RX400/BR-RX400 Hydraulic Disc Brake and Brake/Shift Lever - Left

• Never hesitate to tackle rough surfaces
• Excellent heat dissipation with Ice Technologies
• Flat mount
• Simple set up and maintenance
• Convenient tool access
• Easy hose joint system (J-kit)
• Simple wheel replacement
• Easy and clean bleeding system
• Greater mixed-terrain control
• Gravel inspired lever and bracket ergonomics
• Anti-slip brake lever
• Same light shifting operation as top tier road systems