One of the best things I have done to this car. I put Non-run flat Firestone Indy 500 tires on it and what a difference it made in the ride quality. Bumps and pot holes are much more mild. Wish I had of know this when I bought it new, and I would have taken the new run flats off and put non run flats on then. If I buy another one, I will do that in the first few days if not sooner.