What is the largest tire you can put on a ford

most ford pickup rims are 15*7 its kind of a narrow tire therefore the biggest tires are 285/75. those will fit fine too big will rub, crack the sidewall, even cause a blow-out. you can go to your local goodyear and they will lookup your vehicle find the biggest-best tire fore your application, then give you a quote to take with you.

It's best that you visit a major tire store . They can help you get the proper size. Remember it's for your safety.