・More control and peace of mind in racing conditions."Optimal balancing of the hydraulic braking system for racing.Specific brake lever shape, stroke, point contact and rigidity, dedicated shift paddles" Lightweight-Carbon/plastic composite shell cover・More intuitive and faster shifting"More precise shifting and ergonomic position of the gear shift lever・Customizable function for all practices"Possibility to activate or deactivate the multiple gear shift-E-TUBE PROJECT・Optimal power transmission and good grip"Perfectly ergonomic shape of the hand rest, which is also thicker and softerFeaturesWith a compact overall shape, the DURA-ACE R9150 shifters combine both SHIMANO 's hydraulic disc brake technology and class-leading DI2 electronic shifting in a package that's ready for the toughest racing situations. Updated feel and button layout ensure precise shifting, while improved ergonomics ensure comfort and allow you to focus on the effort.