So i got tires for my wifes ss/sc 9/1/07..nexen n3000 235/40/r18 and she's put just over 26,000 miles on them....3 are pretty good looking but one tire...the sidewall is starting to like peel away from the top of the tire...sounds really bad and i flippedout when i saw it, then, i actually felt it and peeled back the piece and it could be cut off with a razor blade and you probably wouldn't be able to tell it did what it is doing....anyways...iv'e only rotated her tires like 3 times maybe...actually like 2 times myself.. i believe...does anyone go by a schedule actually? how long have your tires lasted??oh and to the nasayers that think the tires gonna blow any day...we drove it 8 hours one way and back to northern ohio,(we're in southern indiana) to cedar point last sunday...and the tire never blew out or anything...but that doesn't mean i'm not going to replace her tires very soon...cuz i am