I've got a 2004 with 16" aftermarket rims (8" wide-I think). I have a 6 1/2 lift so have plenty of room. I'm on a budget and am not looking to change wheel size right now. Anyone know what the tallest tire is that I can fit on a 16 inch rim?

 

I assume your Super Duty is a 4x4. If if is, you should be able to fit 37x12.50's.