But that is my point, the squish in a tyre, and particularly a flat one,
results in squirm of the tread on the road, or the wheel turning relative to
the tyre, that means that the distance a car travels along the road *isn't*
the same as the same as the circumference of the fully inflated and unloaded
tyre. If one accepts that distance travelled for a given number of
revolutions *is* governed by the radius of a *solid* wheel, then one must
accept that the *rolling* radius given by a tyre has the same effect. The
'excess' is taken up by squish and squirm, which is what generates the heat
in a normally inflated tyre and the excess heat in an under-inflated tyre.
----- Original Message -----
> Very true, Paul, but, in that case, the track doesn't make one complete
> revolution for each complete revolution of the wheels -- as is the case
with
> a wheel and tire.
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