Shift/Brake Lever Shimano GRX ST-RX815 Di2 Right, 11-speed

Shift/Brake Lever Shimano GRX ST-RX815 Di2 Right, 11-speed

The Shimano GRX Di2 ST-RX815 is a right-hand 11-speed electronic Di2 Dual Control shift/brake lever designed for gravel, road and cyclocross riding. Shimano’s Di2 technology ensures ultra-precise and instantaneous rear shifting, while the hydraulic disc brake system delivers powerful and well-modulated braking performance on technical descents and rough gravel terrain.

The GRX ergonomics are specifically developed for mixed terrain. A raised hood head helps prevent hand misalignment and slipping, while a ribbed finger groove increases confidence and control. The anti-slip texture and brake lever coating provide a secure grip even in wet conditions. A higher brake lever pivot and curved lever design enhance braking efficiency and reduce hand fatigue on long rides. The result is greater control, improved grip and enhanced confidence on uneven surfaces and fast descents.

• Application: Gravel, Road, Cyclocross
• Group: Shimano GRX Di2
• Model: ST-RX815
• Type: Dual-Control (STI), Di2
• Mount: Right
• Rear speeds: 11-speed
• Reach adjustment: Yes, with tool
• Handlebar diameter: 23.8 mm / 24.2 mm
• Cable port: Straight
• Brake type: Hydraulic disc brake
• Recommended hose: SM-BH90-JK-SSR
• Recommended caliper: BR-RX810
• Recommended rotor: SM-RT800
• Main unit: No
• Firmware update via E-Tube Project: Yes
• E-Tube ports: 2
• E-Tube plugs: 0
• Sprinter remote switch ports: 0