SHIMANO
Shift/Brake Lever Shimano GRX ST-RX400 Right, 2-Speed
Shift/Brake Lever Shimano GRX ST-RX400 Right, 2-Speed
The Shimano GRX ST-RX400 is a gravel-specific Dual Control (STI) lever that combines mechanical shifting and hydraulic disc braking in a reliable and performance-focused design. Developed specifically for mixed-terrain riding, the GRX series delivers confident control on gravel, dirt roads and asphalt alike.
Gravel-inspired ergonomics and a textured, anti-slip brake lever ensure secure grip even in wet and muddy conditions. Powerful hydraulic braking maintains control on steep and technical descents, while shifting remains light and precise—comparable to Shimano’s high-end road systems.
- Model: ST-RX400
- Series: GRX
- Use: Gravel, Road, Cyclocross
- Type: Dual-Control (STI)
- Front speeds: 2-speed
- Mount position: Right
- Brake type: Hydraulic disc brake
- Reach adjustment: Yes (with tool)
- Handlebar diameter: 23.8 / 24.2 mm
- Recommended caliper: BR-RX400
- Recommended hose: SM-BH90-JK-SSR / SM-BH90-J-SSR
- Recommended Disc Brake Rotor: SM-RT70 / SM-RT64
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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.