Powerful fully bled XT 4 pot hydraulic Servo Wave disc brake for more aggressive riding styles. Fully bled lever & calliper comes without adapters or rotors giving you the freedom to customize to suite your bike, short stroke Servo-Wave mechanism for quick pad engagement & more power for aggressive riding. 4 oversized phenolic pistons optimized for heat insulation, lightweight & stiffness. Using Ice Tech alloy fin pads further improving heat radiation performance. Recommended for use with Ice Tech rotors for optimum braking performance.