The reason I question this metric of danger, specifically on the Bronco, is the tire size difference from Base to BB/BD/OBX is over 3%. And that's with the same suspension.I don't know the scientific reason but all tire companies say it .... if ALL YOU DO is upsize the tire size from stock and not change anything else they recommend staying close to %3 .... if you do other mods such as suspension or rims, or a lift it is a whole new equation because you have changed the handling characteristics of the vehicle in a major way. But there is ratio involved to changes and mods that have to be observed.
I'm sure You Tube or Google can offer better explanations but I think the %3 applies to the wall height of the tire vs the width of the rim its mounted on, but I'm not certain.
EDIT: look at this ----> https://www.edkenleyford.net/changing-tire-sizes-good-or-bad-idea.htm
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