The largest common 13" ST tire has a width of 185 mm; the smallest common 14" ST tire has a width of 205 mm. The difference of 20 millimetres means that each side needs 10mm (almost 1/2") more clearance than needed for suspension movement and tire distortion while cornering.
The overall radius of these sizes (185/80R13 and 205/75R14) can be similarly compared to determine how much room around the periphery of the tire will be used up by the larger size.
1979 Boler B1700RGH, pulled by 2004 Toyota Sienna LE 2WD
Information is good. Lack of information is not so good, but misinformation is much worse. Check facts, and apply common sense liberally.
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