For a streamlined cockpit and easy access to the dropper post lever, Shimano's RX810-LA dual control lever integrates the brake lever and a dropper post actuator for fast and effortless operation. GRX BR-RX810 hydraulic disc brakes feature a low-profile flat mount design and provide greater control for mixed-terrain riding. - Control a dropper post using the shift lever - Simple set up and maintenance - Excellent heat dissipation