The Shimano GRX ST-RX810 is a gravel-specific dual control lever that combines 11-speed mechanical shifting with hydraulic disc braking in a single right-hand unit. Purpose-built for mixed-terrain riding, it delivers the precise shift action and powerful, modulated braking that demanding off-road and gravel routes require.

Highlights

• Gravel-tuned ergonomics: The hood profile features a more pronounced downward slope than road levers, keeping wrists in a neutral position whether gripping the hoods or drops on rough terrain.
• Anti-slip brake lever: Textured brake lever blade improves grip and braking confidence on muddy, wet, or vibration-heavy surfaces.
• Light mechanical shifting: Draws on Shimano's top-tier road shifting mechanism for crisp, reliable 11-speed actuation with low hand effort.
• Tooled reach adjustment: Lever blade distance from the bar is adjustable to suit different hand sizes and rider preferences.
• Hydraulic disc braking: Mineral oil hydraulic system delivers consistent, powerful stopping with progressive modulation — no cable stretch, no cable contamination.
• SERVOWAVE technology: Shimano's SERVOWAVE lever geometry accelerates initial pad travel to eliminate dead stroke, then changes leverage ratio at pad contact for smooth, controlled power application.

GRX Design Philosophy

GRX is Shimano's dedicated gravel groupset line, engineered with input from gravel and adventure riders. Every detail of the ST-RX810 lever — the hood angle, the brake lever pivot height, the textured grip surface — reflects the specific demands of unpaved terrain. Where road levers are optimised for speed and aerodynamics, GRX levers prioritise control, comfort over long distances, and reliability in variable conditions.

Compatibility & Fit

This is the right-hand lever, operating the rear brake and rear derailleur. Compatible with Shimano 11-speed road and GRX rear derailleurs, including GRX RD-RX810, Ultegra RD-R8000, and 105 RD-R7000. Uses Shimano mineral oil (not DOT fluid). Pairs with flat-mount hydraulic disc brake calipers — the matching caliper is Shimano BR-RX810. Sold as an individual lever without hose or caliper. Note: in Australian convention, the right lever controls the front brake when using a standard cable brake setup, but on this hydraulic system the right lever controls the rear brake hydraulic circuit as supplied.