Shimano GRX ST-RX400 Right Hydraulic Disc Brake & Shifter for Road Bikes

The Shimano GRX ST-RX400 10-Speed Hydraulic Disc Brake Lever is engineered for riders tackling mixed terrain, blending precision shifting with confident braking for gravel adventures or rugged commutes. Designed with gravel cycling in mind, its Dual Control lever offers ergonomic comfort and intuitive control, ensuring you stay in command whether navigating loose trails or pavement transitions.

Key Features:
– Terrain-Ready Performance: Resin brake pads deliver consistent stopping power on varied surfaces, while hydraulic mineral oil ensures smooth operation in all conditions.
– Adjustable Ergonomics: Tool-free reach adjustment accommodates diverse hand sizes and riding styles, promoting a natural grip and reducing fatigue during long miles.
– Seamless Shifting: Inherits the crisp actuation of Shimano’s premium systems, enabling quick gear changes without compromising speed or control.
– Compatibility Precision: Works exclusively with Shimano FD-RX400/FD-4700 front derailleurs and RD-RX400/RD-4700 rear derailleurs for optimized drivetrain harmony.

Why Choose the GRX ST-RX400?
| Feature | GRX ST-RX400 | Competitor Models |
|—————————|————————–|——————————–|
| Adjustable Reach | Yes (tool-free) | Limited/no adjustment |
| Brake Lever Grip | Anti-slip resin compound | Standard rubber |
| Terrain Suitability | Gravel/mixed terrain | Road-focused only |
| Fluid Type | Mineral Oil | DOT fluid (less user-friendly)|

Ideal for endurance cyclists and gravel enthusiasts, this lever pairs flat-mount calipers with a sleek black finish, offering a clean aesthetic without sacrificing function. Whether conquering technical descents or long-distance routes, the GRX ST-RX400 prioritizes reliability—ensuring every shift and stop feels deliberate and responsive. Perfect for riders seeking balance between affordability and performance in hybrid riding scenarios.