tire size

I suggest that you go to the "Forums" section and study the combinations that are out there . there are so many it will make your head spin . It depends on your wheels . Are they 14, 15, 16 . what is the backspace ? How wide are the rims ? Take into account the bulge of the tire at normal pressure . This is the widest point . Take into account also the overall height . Not all 60 series are the same height . 235's are safe . I can't speak to 245's or 255's Good luck , Tom