OK I had to reread your post. You are due to change pads, and the rotors are worn past the min thickness. Yes they need to be replaced. No brake shop is going to tell you anything different. Sucks I think they made them so thin to save weight. Anyway I would replace them, I don't think those specs were meant as "track only" specs.

 

^^ Thanks. I do my own brake work, so I will not be going to a brake shop. I figure I could get enough advice here that some of it might be good.

I really surprised that the rotors are below thickness specs on only the second set of OEM pads.

More thoughts...

 

Anyone else?

 

Would I be nuts to not change them when I change my pads next?

Well, this has crossed my mind as well...but when you think about it, brakes are only second in importance to tires as far as safety in your car. I agree that the cost of new rotors is hard to swallow but then think of the performance that comes at a relatively low price.

New rotors are next on my list especially sine I have turned my original rotors once, picked up a used set cheap and had those turned...(waiting for street/emergency use), and have started tracking the car...so some DBA's are next on my list....What I need to decide is whether I want to go 2 piece in front and make the jump to SM for autoX, or just go with some 4000's.

Good luck with your decision..hopefully what ever you decide, it does not cause any har to you, your car, or anything else.

 

^^ Thanks. I now have a new set or rotors waiting to go on, but having rotors below spec thickness after only two sets of OEM pads is a bit crazy. I would have though they would have had a longer life.

 

In my experience, 2 sets of pad to 1 set of rotors is pretty standard for most cars.

 

56000 mi

 

I'll have my wheels off but after seeing those specs I'd wonder if my rotors don't need replaced, especially the front. I have just over 57k. I'll get some measurements tonight if I can along with a picture or two.

 

Aside from being pretty darn dusty - the stock pads do seem to wear the rotors a bit on the rapid side considering the performance. Maybe another reason to eschew the $300 OEM pads.

 

Something to keep in mind- if you were to lathe the rotors you would take a lot more off of your already insufficiently thick rotors. The thinner you go the less heat the system can handle, but the OEM system is so far beyond what the typical driver uses on city streets that you probably have a bit of room on that. The thing that you could see a problem with (especially with large diameter rotors) is wear issues or warping. If you really want to keep the rotors you should measure them for runout and parallelism.