That's odd. I was able to go with 255/55R18's without rubbing the struts. My tires rub the inside of the wheel well though. I added wheel spacers to try to get rid of the rubbing but it didn't make a difference.Both the front and rear tires slightly protrude from the fenders about 1/4 inch. The shop had to use the B2BFAB spacers to keep the tires from rubbing on the struts.