Mark S

Yikes those look bad.

rk-d

Now that’s definitely a thing. I’ve had the barrels scratch, though the calipers were fine.

Jeff4598

People pay thousands for lighter wheels to improve handling due to decreased unsprung weight. Is that not a major benfit of PCCB's? If so why no mentions of that and if not why not?

Mark S

Interesting that those rotors are okay for a CPO.

colnagoG60

What's wrong with them?

Mark S

Are all the little hairline cracks okay? Maybe fine as I am not a mechanic, just looked bad to me.

I think I might be missing the whole point of your pictures.

colnagoG60

I posted the pics to show the scoring on the inside of the wheels (left and right fronts).

As far as the rotors, this is my first go round with carbons, however they look similar after 43k miles to ones I've seen with 100 - 5,000 miles. From what I understand, aside from obvious visible physical damage (e.g.chips, divets, etc) "density" is the main concern regarding wear. Car has been to multiple dealerships, over (14) time in the almost (2) years of ownership, twice for brake related issues, and I have yet to be told the rotors need attention...praying I never do.

Mark S

Got it, thanks for the clarification.

motorchimp

CPO is very subjective.
My first 911 was CPO and had issues left and right. Was a great learning experience for me.
the hairline cracks are normal I think but one of the rotors seems to have a chip in it.

992Sam

Folks folks…. They “hairline” cracks on the PCCB rotor is perfectly 100% normal … sheesh.

rk-d

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Little cracks are fine. They are a characteristic of the ceramic rotor and look like that from factory. He’s pointing out the scratches on the wheel barrel.

911Castle

Omg, those rotors are in mint condition. They look perfect. Forget the hairline whatever. That is ? from the first mile. Any brand and mileage. Geeeesch. The miss information from a few is perpetuating this thread. Ridiculous. They are not Fragile!!!!

ipse dixit

Those rotors look fine.

PCCBs are measured for wear using a Carboteq tool to gauge density. And it should be done with them unmounted from the car.

Hard to use a visual inspection to gushed PCCBs.

colnagoG60

What misinformation? One questioned visible surface cracks, and all subsequent responses confirmed normalcy.

Mark S

Thanks for giving a concise answer with good info and not using insults. Appreciate it.