Q: Brake rotor thickness before replacement

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What is the minimum thickness of the brake rotor before it must be replaced? Is there a minimum thickness in order to be machined?

My car has 83000 miles.
My car has an automatic transmission.

The standard thickness when new the front rotors are 28mm or 1.102 in. The minimum thickness before or after machining is 25.0mm or .983 in. This means you cannot take off more than about 3mm or .10 in if the rotor started at 28mm or 1.102 in.

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