Its about the spare, or the lack thereof
#61
Here's a chart indicating tire sizes for certain wheel widths.
Tire Width for a Wheel/Rim Size Chart
If your F has 20" wheels you have 20x9 in the front and 20x10.5 in the rear.
Tire Width for a Wheel/Rim Size Chart
If your F has 20" wheels you have 20x9 in the front and 20x10.5 in the rear.
#62
#63
I was thinking about the diff too, that would be a good solution, UNLESS it was an AWD, then all four have to be exactly the same, right? I have a friend that fried her diff on an AWD Volvo wagon. Not because of different sizes, just because she got two new tires and had two worn tires...
#64
#65
But dang, makes you wonder about these people...