The Ultegra ST-R8020 dual control lever allows more accurate and precise shifting. It has a greater reach for adjusting your brake and gear levers. The redesigned internal shifting unit ensures a quick and intuitive rear-shifting operation. When paired with the new FD-R8000 front derailleur, your front shifting will be even lighter.In addition to the benefits of the ST-R8000, the ST-R8020 adds an extra bonus in combination with the hydraulic disc brake: better rider control in all conditions. The small bracket size feels great on the palms and improves the ergonomics.The hydraulic Ultegra BR-R8070 provides the next stage of rider control in all conditions. Utilizing a lightweight and minimalistic Flat Mount design, the sleek caliper integrates seamlessly into a road bike's aero profile where it can be installed directly at frame or fork. The SM-RT800 rotor (optional) offers even greater heat management capability than Shimano's industry-leading ICE TECH Freeza rotors, resulting in unparalleled braking performance and reliability in the most demanding conditions.