Abstract: An improved disc brake system of the general type including a brake frame having a pair of spaced apart rails, a pair of brake linings slidably carried on the brake frame rails, a circular rotor rotatably carried on the wheel assembly of a vehicle and having smooth planar inboard and outboard contact faces, a caliper assembly slidably mounted on the rails of the brake frame, and, a brake pedal operatively associated with the caliper assembly, the caliper assembly having a piston which when actuated by depressing the brake pedal first forces one brake lining against the inboard contact face of the rotor and then causes the caliper assembly to slide along the brake frame rails to force the other brake lining against the outboard contact face of the rotor. The improved disc brake system minimizes the amount of heat generated when the brake linings frictionally contact the rotor and markedly increases the operational life of the rotor and brake linings.