Originally Posted by
BlueStreak
I'm inspecting my brakes after my Homestead track day and noticing some grooves on my right front. About twice as much as on the left front. The pads are Hawk+ on RotorPros slotted rotors.
In the past, on my much smaller cars, SVT Focus and MR2, I have pretty much ignored the grooving and just put new pads on, etc.
When should you think about turning or replacing the rotors? Do you ever replace just one?
Right
Left
Grab a micrometer from a tool shop and look up what the factory limits are for front and rear brake rotors. Measure the rotors and if they are measuring below the limits, it's time for NEW rotors. If they are well within the factory limits, consider having them turned by a brake shop with a lathe.
You also might be able to rent a micrometer from Autozone or Advance Auto through their loaner tool program, but if you track the car often, you'll want to measure them similar to how you check pad depth before/after track events to make sure you have enough material left.