Shimano GRX ST-RX815/BR-RX810 Di2 Shifter/Hydraulic Brake Lever Set

The Shimano GRX ST-RX815/BR-RX810 Di2 Shifter/Hydraulic Brake Lever Set puts electronic shifting and hydraulic disc braking into a single lever body designed specifically for gravel riding. Sold as individual sides — left shifter with front brake or right shifter with rear brake — each unit pairs the ST-RX815 Di2 lever with the BR-RX810 hydraulic caliper and includes the brake hose.

The ST-RX815 lever features an anti-slip textured grip, which helps maintain control on rough, unpredictable surfaces where your hands are working as hard as your legs. The BR-RX810 caliper runs a flat-mount design with anti-mud properties intended to keep the system functional in off-road conditions, along with a clean bleed port setup that makes maintenance straightforward. At 180g per shifter and 140g per caliper, the set keeps weight in check without asking you to compromise on braking modulation or shifting precision.

Shimano GRX ST-RX815/BR-RX810 Di2 Shifter/Hydraulic Specs at a Glance

• Shifter: ST-RX815 Di2 electronic lever
• Brake Caliper: BR-RX810 hydraulic disc, flat mount
• Drivetrain Compatibility: 11-speed Di2 electronic
• Shifter Weight: 180g per unit
• Caliper Weight: 140g per unit