SHIMANO
Shift/Brake Set Shimano GRX ST-RX600/BR-RX400 Left, 2-speed
Shift/Brake Set Shimano GRX ST-RX600/BR-RX400 Left, 2-speed
The Shimano GRX ST-RX600 + BR-RX400 is a left-hand 2-speed Dual Control shift and hydraulic disc brake set designed for gravel, road and cyclocross riding. GRX-specific ergonomics are tailored for mixed terrain, offering secure grip, stable handling and precise shifting even on rough surfaces.
The BR-RX400 Flat-Mount caliper delivers powerful and consistent braking performance on steep descents and demanding terrain. Efficient heat dissipation helps maintain stable braking force, while the one-way bleeding system ensures easy and clean maintenance. A non-slip brake lever and tool-adjustable reach allow riders to fine-tune their setup for maximum control.
- Application: Gravel, Road, Cyclocross
- Series: GRX
- Model: ST-RX600 / BR-RX400
- Type: Dual-Control (STI)
- 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
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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.