"It said that at 55 mph, the portion of the tire directly fore and aft of the
axle
was travelling at 55mph, the portion of the tire at the very top was
travelling 110mph and the portion of the tire at the very bottom was
travelling 0mph."
That is forward tire speed relative to the ground. Not how fast the tire is
rotating. The patch of tire in contact with the ground is stationary relative
to the ground (else your tire would be spinning on the ground).
-Greg
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