Gravel drop bars ask more of a lever than road bars do — you're gripping harder over rough ground, riding the hoods for hours on rolling dirt, and reaching for the brake blade with two fingers instead of four. Shimano built the GRX ST-RX810 Dual Control Lever around that reality, borrowing shift internals from the Ultegra-level road groupsets but reshaping the hood body and lever blade for the way hands actually sit on a gravel bike. It runs cable shifting with hydraulic braking, which keeps the shift side field-serviceable without giving up the stopping power a loaded gravel bike needs.

The hood shape sits taller than a comparable road lever, with an 18mm higher brake pivot that lets you brake from the hoods with more mechanical advantage — useful when you're descending fire road and don't want to move into the drops to find the bite point. The blade itself carries a textured anti-slip coating that holds a wet or gritty glove, and reach adjust lets you dial the blade closer to the bar if you have smaller hands or prefer riding one-finger on the brake. Free stroke adjustment sets where in the lever pull the pads engage the rotor.

Braking runs on Shimano mineral oil through Servo Wave lever geometry, which pulls the pads toward the rotor quickly on the initial squeeze and then increases leverage once the pads make contact. That gives you a firm bite point followed by fine modulation — the useful combination for managing speed on loose surfaces where too much brake causes a skid. Mineral oil is also more forgiving than DOT fluid during bleeds, and won't damage frame paint if a drop escapes.