I agree with this. Granted it is a soft atv tire and not a truck tire. The theory that the circumference of the tire remains the same makes sense, but it's hard to ignore personal experiences.
On duals you will see the following
The lower psi trie will cup/drag/scrub run hotter in the dual set..
Usually takes 10-15k miles to see the pattern
It's more prevalent when loaded vs unloaded.
Even as little as 1psi can do it.. It also effects the MPG as well..
Most major semi truck companies will do the following, if one of the duals goes bad either both get replaced or a spare with tread depth within say 2-4/32 of the other tire is put on... Tread depth(talking 1" deep tread
New to old/worn tread you talking changing tire diameter of upwards of 2") will do similar wear patterns as psi inflation difference
One can also see difference in road speed as well usually at 65mph it's a less than 1mph difference
Millions of $$$ have been made making products to keep tires in dual sets equal..
While drag slick are definitely show grow/balloning given PSI then say an OTR 22.5 tire.. The both do the same thing
On my hotshot I adjust tire psi to maintain an avg wear patterns across the entire tread.. Too much I burn the center out, too little I burn the sides/shoulders off and heat the sidewall up..this difference can be as little as 5psi. And I only have a 225 wide tire, logic would say for wider tires less psi would be need to change tread patterns
Get into circle/road course applications and you're talking .25psi change to the tires has major effects to the handle of the vehicle.
Now to answer Josh's questions I'm sure it's specific to each tire to find out Xpsi changes circumference Y amount
