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...short answer: yes, some tires "squish" more than others so their actual rotating "radius/diameter" under load & speed is LESS than their physical radius/diameter!
...for instance, the "common" rotating radius/diameter is 0.97 of the tires actual physical radius/diameter...but that number can (and does) vary between 0.90 and 0.99 depending upon: (a) the tire, (b) the air pressure, (c) the load, (d) the speed, etc.
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