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Sometimes, deep scores get worn into brake rotors. This can happen Nike Air Foamposite One if a worn out brake pad is left on the car for too long. Brake Jordan Retro 2 rotors can also warp; that is, lose their flatness. If this happens, the brakes may shudder Jordan Winterized 6 Rings or vibrate Air Jordan 2 Retro when you stop. Both of these problems can sometimes be fixed by refinishing (also called turning or machining) the rotors. Some material is removed from both sides of the rotors to restore the flat, smooth surface.
Refinishing is not required every time your brake shoes are replaced. You need it only if they are warped or badly scored. In fact, refinishing the rotors more often than is necessary will reduce their life. Because the process removes material, brake rotors get thinner every time they are refinished. All brake rotors have a specification for the minimum allowable thickness before they need to Air Jordan 5s be replaced. This spec can be found in the shop manual for each vehicle.