A5: Disc Brake Diagnosis and Repair Brake Pad Wear Indicator Check Brake Rotor Caliper Gauge Brake Swept Area Brake System Components Coefficient of Friction Disc Brake Apply & Release Inertia Micrometer Micrometer Metric Retract Caliper Piston Rotor Parallelism Measurements Rotor Runout Rotor Runout & Steering Wheel Shake Rotor Thickness Measurements Rotor Thickness Variation & Brake Pedal Pulsation Rotor, Remove and Replace