Ergonomic and powerful Servo Wave hydraulic disc brake levers offer exceptional control and modulation. Short stroke Servo-Wave mechanism for quick pad engagement and more power for aggressive riding. An increase in pad clearance at the calliper has enabled Shimano to use their proven Servo Wave technology. As the brake lever is pulled a cam linkage enables rapid pad to rotor engagement, at the point of contact the cam moves across multiplying the leverage ratio and increasing the stopping power