The Shimano GRX ST-RX400 left shifter delivers the reliable braking power gravel riders demand.
Engineered specifically for hydraulic disc brakes, this dual-control lever provides excellent deceleration performance to maintain control on steep, technical, and unpredictable descents. Its gravel-inspired ergonomics and anti-slip brake lever ensure confident handling across loose surfaces, while the same light shifting operation as premium systems keeps you responsive on mixed terrain. Built for gravel, road, and cyclocross riding, it's the control you need when conditions get demanding.
Features
- Gravel inspired lever and bracket ergonomics
- Anti-slip brake lever
- Greater mixed-terrain control
- Same light shifting operation as top tier systems
Specification
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Use: Gravel, Road, Cyclocross
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Group: GRX
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Model: ST-RX400
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Type: Dual-Control (STI)
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Handlebar mounting: left
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Gear front: 2-speed
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Optical gear display: No
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Lever reach adjust: Yes, with tool
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Handlebar diameter: 23.8mm/24.2mm
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Cable connection: Straight
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Brake-type: Hydraulic Disc Brake
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Recommended brake hose: SM-BH90-JK-SSR, SM-BH90-J-SSR
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Recommended brake caliper: BR-RX400
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Recommended brake rotor: SM-RT70 / SM-RT64
Material
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Lever: Aluminium, painted
Colour
Weight
Contents
- 1 Shimano GRX 2-speed STI Dual Control ST-RX400 left for Hydraulic Disc Brake
- 1 Gear wire (Optislick) 1800mm
- End caps
We reserve the right to make changes to the product information contained on this site at any time without notice, including with respect to equipment, specifications, models, colours, materials and pricing. Due to supply chain issues, compatible parts may be substituted at any time without notice.
Weights are based off pre-production products at time of publication. Weights may vary in final production.
