The Shimano Dura-Ace ST-R9120-R is a hydraulic brake and shifter combo designed specifically for road bikes with 11-speed drivetrains. It features a right-hand configuration and combines shifting and braking into one integrated lever. The shifter offers quick, intuitive gear changes with a shorter lever stroke and a redesigned internal unit that reduces effort for shifting the rear derailleur. This lever provides an expanded reach adjustment range of 10.9mm, so riders can customize the lever position for comfort and better control.

This component uses Servo Wave technology, which provides fast initial pad movement followed by a rapid increase in braking power to improve modulation and control, especially useful in varying weather conditions. The hydraulic brake actuation is powered by mineral oil for consistent performance. Its compatibility is limited to Shimano road 11-speed rear derailleurs, making it suitable for high-end road cycling setups.

Installation uses a band clamp that fits handlebars with diameters from 23.8 to 24.2mm. The combination of plastic and lightweight metal materials balances weight and durability, tailored for road cyclists seeking precise and responsive gear and brake control.