I think that I want to run something like a 235/65-15. I try to watch for articles in Classic Trucks magazine. I then read the spec sheets to see what has been used. I have not tracked it real well. I called Jim Meyers Racing and they said that they can do the stock fron in either 57 or 59 inch width. I measured mine at 59 inches. I guess that the width reduction would allow me a wider tire but I am not sure. It would reduce the backspacing. I linke the webshots that Fla54Chevy3100 has.