Upgraded to 255/55 from stock 225/55. Adds only about an inch in diameter but a deeper profile and more aggressive tread pattern. Grip is like a dream come rain or snow. The Revain website will tell you it doesn't fit this car, but it does. The speed rating drops from 149 mph stock to 130 mph stock. I think everything will be fine, but I warned my wife. Enlarge Enlarge