Shimano xt m785 disc brake leverergonomic and powerful servo wave xt hydraulic disc brake levers offer exceptional control and modulation featuresshort stroke servo wave mechanism for quick pad engagement and more power for aggressive ridingan increase in pad clearance at the caliper 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