The Shimano ST-RS505-R is a right-side integrated brake and shifter lever designed specifically for road bikes with hydraulic disc brakes. It is compatible with 11-speed drivetrains and functions with double front chainrings. Made from aluminum, this shifter offers a reliable option for riders seeking a hydraulic STI (Shimano Total Integration) lever that allows smooth shifting and consistent braking forces. Its hydraulic brake lever features reach adjustment to fit different hand sizes, improving rider comfort. The ST-RS505-R is compatible mainly with Shimano 105-level groupsets, also working well with Ultegra and Dura-Ace 11-speed road components. It connects to Shimano hydraulic disc brake calipers such as the BR-RS785 and BR-RS505.