SHIMANO
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
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Estonia
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Finland
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Latvia
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Lithuania
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Shimano is a Japanese component manufacturer that since 1921 has been one of the world’s largest suppliers of bicycle drivetrains, brakes and cycling-specific parts. Shimano groupsets — from Tourney for city bikes to top-tier Dura-Ace — are found on virtually every serious bike brand. The company also makes fishing tackle and rowing components.