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I have an issue with vibrations when driving over 80 k\h, and someone who inspected the vehicle said the rotors are warped. Of course I realize it could be something else and I'm going to verify it myself, but assuming it really is the rotors, do I have to replace the brake pads at the same time, or can I just do the pad bedding process to shape the current pads to the new rotors?

  • If it was rotors you should only get vibration under braking... – GdD Nov 10 '17 at 13:50
  • @GdD So you think maybe it's wheel weights or something like that? I did notice when airing up the tires that the car has four different tires on it, each one from a different manufacturer with a different PSI rating... – Robert S. Barnes Nov 10 '17 at 14:03
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    Vibration at highway speed, when not braking, will be something to do with worn suspension components, wheel alignment, or tire/wheel balancing. Or a combination of all of them. Unmatched tires could be an issue if the sizes are different. Are they all the same size? – CharlieRB Nov 10 '17 at 14:37
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    Wheel balancing is a good bet, and could be the simplest to fix. In addition to @CharlieRB's list there's worn steering components and damaged wheels. – GdD Nov 10 '17 at 14:45
  • Don't read the PSI markings on the tires. Those are simply the maximum cold pressures. Look inside the driver door for the proper PSI. – Spivonious Nov 10 '17 at 18:35
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It is always recommended to replace the pads when replacing, or resurfacing, brake rotors.

The pads may look fine, but if you are trying to solve the vibration issue, using the old pads could transfer problems you cannot see, like uneven wear, cracks, etc.

  • Yes, always replace when new rotors... – Solar Mike Nov 10 '17 at 16:18

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