There's a lot of good info in this thread. Just my $.02, I'm running 265/35/18's in the front and 285/35/18's in the rear on my '01 Cobra. I am running chrome Y2K Cobra R's, genuine Ford. I believe the width and backspacing is the same as the FR500. I got the Yokohama AVS's because the revolutions per mile were the same as the stock size tire. (and yes, the same number size tires are not the same exact size). There are no clearance issues whatsoever and the speedo is right on. The only thing the tire guy said the 265's were a little hard to get the beads to seat in the 9 1/2 rim. They do look good.