jazzwu

Probably just paranoid but these are shots of my rear rotors. My fronts are fine.

If one looks closely (hopefully without a magnifying glass haha), one can see little white streaks especially on the top rotor.

Is this normal wear?

Johnny DB

Just looked at mine and I have similar white streaks...not sure if it's normal or not though.

autobonrun

My PCCB's have these fibers as well. Mine look light gray to the naked eye but under a flash can look white in a photo. Just took a photo with flash on to test the theory. What you don't want to see are any hairline cracks from one hole toward an adjacent hole. Yours look fine to me.

jazzwu

oh alright thanks then.

johnbelk

Very normal wear... Consider what the rotors and pads are maufactured from, carbon fibers and phenolic resin....which makes sense why you would see white streaks.

https://www.google.com/amp/www.automobilemag.com/news/carbon-ceramic-brembo-brake-rotors/amp/

Although, as the previous RLer posted, watch for cracks between the vent holes.

As you may already know, these rotors can be damaged by an errand rock or knuckle head changing a tire. Extra care should be given when the wheel is being removed/replaced... $$$$$$.

Here's a pic of my left rear rotor, white streaks and all... JB