I don't see how it's hijacking a thread when the question is about ground clearance and the "hijacking" is all about how much ground clearance results from a tire.
Tires have ONE diameter. Wheels have ONE diameter. You can change either but the fact remains that the distance from tread surface to tread surface across the center point of the tire/wheel combination is the diameter of a specific tire and changing that number by 2 units will only increase ground clearance by the increase in the RADIUS which is 1/2 the diameter change or ONE UNIT.
It's simple geometry.
We've done so much, for so long, with so little, that we can now do the impossible, overnight, with nothing.
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Retired mech (auto/aviation), Extra Class HAM, NAUI/PADI OpenWater