The Shimano GRX ST-RX810 is the top model in the gravel shifters series. The right lever controls an 11-speed cassette, while the left manages a crankset with 2 rings. The lever works exclusively with hydraulic brakes. The ergonomics of the shifter are excellently tailored for gravel riding, providing outstanding access to the lever regardless of hand position. Gear shifting is straightforward, similar to that of top road models. The top of the "hood" is covered with a non-slip material. This material is deeply woven, ensuring a secure grip. The Shimano GRX ST-RX810 features Servo Wave Action technology. The initial pressure on the lever causes the brake calipers to quickly approach the disc brake. Once they make contact, the movement of the calipers is less abrupt, facilitating brake control. The Reach Adjust system allows for proper lever positioning, adjusting it to the user's preferences.