Originally Posted by
Beamr
I'm terribly sorry but I don't follow;
if ground speed is 100knots, the tyre outer skin is rolling at exactly 100 knots against the tarmac.
if it would go faster or slower, you would be burning rubber.
If the tyre it self would be going faster than the AC, you'd have a bit of a rush to catch it.
And the entire tread is rotating at 100 knots around the centre. So, the very top is moving forwards at 100 knots