SHIMANO GRX Di2 ST-RX815 Right Lever 11-Speed

The SHIMANO GRX Di2 ST-RX815 right lever completes the pair of 11-speed Di2 controls in the GRX range, dedicated to gravel, cyclocross and mixed terrain. Like its left-hand counterpart, it is based on the DUAL CONTROL LEVER concept, which combines electronic shifting and hydraulic braking in a single unit. On this right-hand lever, the control operates the rear derailleur across 11 speeds, with shifting precision comparable to that of high-end road groupsets thanks to Shimano Di2 technology and Synchro-Shift mode.

The hood ergonomics have been designed for prolonged use away from smooth roads: a raised head reduces the risk of hand slipping, a dedicated notch holds the finger in position, and an anti-slip coating covers the brake lever for increased control on unstable surfaces. The brake lever pivot axis is raised and its curvature optimised to improve braking efficiency while limiting fatigue on long rides.

Hydraulic braking relies on SERVO WAVE technology and mineral oil, for direct compatibility with Flat Mount callipers in the GRX range. The lever body, made from glass-fibre-reinforced plastic, incorporates two E-Tube ports for connection to the rest of the Di2 groupset and function customisation via the E-TUBE PROJECT app. A reach adjustment system adjusts the distance between the lever and handlebar according to hand shape.

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