"The Natural Philosopher" wrote in message
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On 28/06/18 12:11, Jeff wrote:
What matters is the rotation rate of the wheel, because that
is what the ABS sensors are measuring.
No. In the context iof this thread it is utterly irrelvant.#

But we don't disagree that the rate changes. Only by how much, and why.

And when you measure how much the rate changes, that will
tell you if it is changing due to the change in circumference or
the change in the distance between the axle and the road because
one changes much more than the other with under pressure.