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RedDevil,
A new tire's rolling circumference at the rated load and rated inflation pressure is about 97% of the freestanding circumference - and you kind of just proved it. 5/192.5 = 2.6%
The question on the table is: Does the tire's rolling circumference change as the tire wears down? What we need is someone to measure a tire's rolling circumference, then shave off the tread, then measure it again.
It has to be the same tire without dismounting or changing the inflation pressure, because tires grow. You want the tire tested both ways in basically the same condition.
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