cheapest route and best wearing tire is 315-75-16. Its a 35" tire and bf goodrich allterrian. They are the same tires that are on the hummer. It will give his truck 3" lift. You will spend less $$ if you get these tires then getting 15's. The Mickey Thompsons, no matter what make or model they burn off fast on road use. If he has got the aluminum rims on the F250 take them into a speed shop and have them high polished. They will have the weld draglite appearance. Hope this helps! <img src="/forums/images/graemlins/cheers.gif" alt="" />