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The “Warped” Brake Disc and Other Myths of the Braking System

The “Warped” Brake Disc and Other Myths of the Braking System

The term “warped brake disc” has been in common use in motor racing for decades. When a driver reports a vibration under hard braking, inexperienced crews, after checking for (and not finding) cracks often attribute the vibration to “warped discs”. They then measure the disc thickness in various places, find significant variation and the diagnosis is cast in stone.

When disc brakes for high performance cars arrived on the scene we began to hear of “warped brake discs” on road going cars, with the same analyses and diagnoses. Typically, the discs are resurfaced to cure the problem and, equally typically, after a relatively short time the roughness or vibration comes back. Brake roughness has caused a significant number of cars to be bought back by their manufacturers under the “lemon laws”. This has been going on for decades now – and, like most things that we have cast in stone, the diagnoses are wrong.

Read more about brake system myths here at StopTech Technical section or find out about our brake services here.

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RRT Automotive is Northern Virginia's premier BMW, Porsche, Audi and Mercedes service, repair and performance facility.