I have a mazda6 2004 S. A great car. I had 18x7.5" rim with 225/40/18 tires on it for about 6 months. It rides worse then the stock wheels (17"). All of them end up with bulbs which cause a lot road noise. Roads in Detroit and Philly are bad. I'm planning to get 4 new 225/45/18 tires this time. Do you suggest rolling the fenders? Normally, I have 1 or 2 passengers. Any comments.