Quote:
Originally Posted by ASV
the distance between the center of the wheel and the top of the pavement
is your effective radius
geometry will not allow for anything else
without spinning the tire on the rim
part of the tire is however behaving as pavement and causing some confusion
so to clear it up the flex point of the sidewall the invisible point inside the tread that acts as the hinge that point is the difference between the wheel and and the " tank tread "
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I am not sure where this post fits in the scheme of things - BUT -
a) There is nothing you can measure in a loaded tire that will give you the effective rolling diameter (or radius).
b) There isn't a *point* where the tire flexes. The entire tire flexes, and it is most noticeable in the sidewall because it bulges out, but not at a single point. You could look at the sidewall as a arched leaf spring, where the end points are fixed, but compressed closer together. The entire spring flexes, but in the case of a tire, the area near the wheel is much, much stiffer than the rest of the sidewall.