Tech Question: Hair line Fractures on Front rotors

[michael lang]

You didn't indicate if they are cross-drilled and you didn't say what the measurement was. George has a good point about them in regards to vibration under braking. I wouldn't worry too much about the cracking unless there were a large number of cracks and they connected the holes if your brake rotors are cross-drilled or there was a vibration in brake pedal under braking which would indicate the rotors are under spec and are now warping. Good news is that unlike your windshield, brake rotors are real cheap.