Shimano GRX ST-RX610 Lever w/ BR-RX400 Brake 12-Speed Flat Mount Black

Shimano GRX ST-RX610 Shift/Brake Lever with BR-RX400 Hydraulic Disc Brake Caliper – 12-Speed – Black

The Shimano GRX ST-RX610 dual control lever provides light, responsive shifting with gravel-specific ergonomics for improved control on mixed terrain. Paired with the BR-RX400 flat mount hydraulic disc brake caliper, this system delivers strong braking performance, consistent modulation, and excellent heat dissipation for gravel and adventure riding.

This is a multi-variation listing. Please review carefully and make your selection from the dropdown menu before purchasing.

Available Options

• Right / Rear — 12-Speed — 1x — Long Hose (1700mm)

• Left / Front — 12-Speed — 2x — Short Hose (1000mm)

Performance & Use

• GRX 12-speed shift/brake lever with gravel-tuned ergonomics

• Textured hood and anti-slip brake lever surface for better control

• Reach Adjust for customized lever position

• BR-RX400 2-piston hydraulic caliper with ICE Technologies for heat management

• J-Kit connection system for easier setup and service

• One Way Bleeding simplifies maintenance

Compatibility Notes

• Compatible with Shimano 12-speed GRX / Road systems

• Flat mount brake standard

• Uses Shimano Mineral Oil hydraulic fluid

• Rotor not included

• 1x or 2x configuration depends on selection

Specifications (Shared Platform)

• Brand: Shimano

• Model: ST-RX610 + BR-RX400

• Drivetrain Speeds: 12-Speed

• Brake Type: Hydraulic Disc

• Caliper Mount: Flat Mount

• Brake Lever Actuation: Hydraulic

• Adjustable Reach: Yes

• Adjustable Contact Point: Yes

• Pad Compound: Resin

• Shifter/Derailleur Compatibility: Shimano

• Color: Black

• Rotor Included: No

(Hose length, lever position, and drivetrain configuration vary by selection)

Condition & Packaging

• Retail packaged

• Full manufacturer warranty

• Genuine Shimano product

• Authentic, direct from manufacturer

• Includes only what is shown in photos

Professional installation recommended for proper setup and warranty support.