alot of rotor "warpage is actually caused by bad wheel bearings or an unsmooth mounting surface on the hub.. take the car to a shop with an ON-CAR brake lathe.. this will compansate for and rotor/hub runout and make the warpage develop much slower or not at all.. also make sure your wheel bearings have no play in them..

On CAR lathe? Wow...never heard of that before.

They've been around for quite a few years.

That is interesting...I've never heard of one before...

Similar to Bill'* siping of tires...can't really find it round here

Mine just warped for the first time the other day. I got 4 new tires back in November, and the rotors have been fine up until about 2 weeks ago. I think what happened was during a trip back from Kansas City, I had to take a highway to avoid the toll ( :P ), rolling hills, up and down.

Anyway, I was braking quite a bit when a downpour hit, making huge unavoidable puddles. So I was heating the rotors during downhill coasts, then they would get drenched as I hit another puddle. I'm pretty sure that did them in.

But I'll probably get them turned until I can afford the slotted rotors and ceramic pads.

Bill, all tires have siping (skewed like slits), Bill W. has additional siping cut in to his tires.

SORRY, not meaning to hijack. Back to Rotors. My front rotors finally showed signs of warping a few months back. Went to NAPA & bought a set to tide me over for now. Next time I'll upgrade to better.

Yes...sorry about the hijack... (willwren told me the siping in all tires wasn't siping..lol) I usually pick up the lifetime rotors from say Advance or Autozone...without any problems.
Only time I had problems was a 91 Grand Am...the brakes were so undersized and I was so hard on them...Lucky to have pads last 20K

Yea.....my Performance Friction rotors warped after 12k of heavy, heavy stop 'n go traffic (70 to 30 stops are all too common and happened many times during the day). Not much I could do about it, but I turned them and they were only a slight bit warped. I hope now that I have a better commute they'll last the life of the car.

I agree, the ceramic pads are nice, much less brake dust too.

The rotor apps on RSM do look kinda funky. Call or email them. The rotors on my car obviously work.

As far as siping is concerned, there'* a HUGE difference in molded (ineffective) siping and cut siping.

What'* the #2 choice for rotors?

Nobody from RSM is responding to my emails. Furthermore, when I call the guy that answered the phone said that everyone is gone. :? If service is like this just trying to BUY the parts I need, I can only imagine the aftersale experience.

So, what'* the #2 pick for rotors?

Jason mentioned Napa rotors. Can anyone give an unbiased opinion on the Napa rotors?