I just bought my 5th Mustang. I have not made any Mods on my previous. This time I bought one to play with. '02 Vert GT. I just took off my factory Bullit rims and put on a set of 18x9 '95 Cobra R style (they are not OEM). I am dropping it 1 1/2 and went with tires sizes of 265/35 in rear and 255/35 in front (same tire size set up as Saleen). However, to try to save a couple of bucks, I put on Khumo Ecsta Supras. All look great but at about 62 to 65, I get a wild shimmy. It's gone at 70. My tire guys balanced and re-balanced but the shimmy is still there. So i'm getting rid of the Khumo's and throwing on some Pirelli's. I hope it fixes it. Anyone else have this problems?