Shift/Brake Set Shimano GRX ST-RX400/BR-RX400 Left, 2-speed

Shift/Brake Set Shimano GRX ST-RX400/BR-RX400 Left, 2-speed

The Shimano GRX ST-RX400 + BR-RX400 is a left-hand 2-speed Dual Control shift and hydraulic disc brake set designed specifically for gravel riding. It delivers strong and well-modulated braking power to maintain full control on steep, technical or unexpected descents.

GRX-specific ergonomics provide a secure grip on rough terrain, while tool-adjustable reach allows fine-tuning for different hand sizes. The Flat-Mount BR-RX400 caliper with one-way bleeding system ensures easy maintenance and long-term reliability.

• Mount: Left
• Front speeds: 2-speed
• Reach adjustment: Yes, with tool
• Handlebar diameter: 23.8–24.2 mm
• Brake type: Hydraulic disc brake
• Brake caliper: BR-RX400-L
• Mount type: Flat-Mount
• Brake pads: L03A Resin with Fin
• Brake hose: SM-BH90-JK-SSR front 1000 mm (cuttable)
• One-way bleeding: Yes
• Brake fluid: Shimano mineral oil
• Recommended rotor: SM-RT64, SM-RT70, SM-RT800
• Lever material: Painted aluminum
• Caliper material: Painted aluminum
• STI lever weight: approx. 300 g
• Caliper weight: approx. 143 g