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Re: Changing disc brakes - how can you tell if you need new rotors?
We had a few rotors at school from the Mercedes dealership down the road. Some lady came in and said her brakes were grinding. The whole side of the rotor was gone. She was braking on the vents in the center of the disk.
Generally, if its my car, I'll let a few light grooves go. If its someone elses, I'll tell them to buy rotors before I touch the car. Better to charge them a few bucks than to be responsible when they wreck.
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