The Shimano Ultegra ST-R8025-R is the right-side dual control lever combining hydraulic disc braking and 11-speed shifting, designed for road cyclists upgrading to disc brakes or building modern road bikes. It pairs with Shimano Ultegra R8000-series 11-speed rear derailleurs and hydraulic disc calipers using mineral oil. Riders with smaller hands benefit from the compact lever shape and positioning. Servo Wave action provides quick initial pad contact followed by progressive power for controlled stops in wet or dry conditions. At 284 g, it adds moderate weight but delivers intuitive shifting and reliable braking suited for endurance rides or group events.