How much runout should a brake rotor have?
How much runout should a brake rotor have? OEM maximum lateral runout specifications generally range anywhere from 0.0012” to 0.0025” measured ¼” in from the outer diameter of the brake rotor. Obviously, ZERO is the ideal number, so regardless of the OEM maximum allowance for runout, the closer to ZERO, the better. Do you need to measure LRO on a new brake rotor? Measuring brake rotors is critical to performing a pulsation-free brake job. It does not matter if the rotors are new or old, you always need to verify if they are within specification. Lateral Runout (LRO) is defined...