Originally Posted by Aimulator64

Volume is a term that defines quantity. In terms of the tire as a whole, the amount of air inside does not change. The air "compresses" in the tire, but the volume of air does not decrease. If you let the air out of the tire after riding, the same amount of air would come out of the tire as you originally put in, granted none leaked out. And the pressure does not change, and that is why you dont put 300psi in a tire.... 120 psi is stiff, but enough to allow slight compression to make a tire not become a solid entity. 120 psi allows the air to move upward in the tire as it rolls, and the pressure of the air inside the whole tire does not change, but at the particular spot in the tire, yes, pressure increases, but at the same time, the pressure forcing the air down toward the rim by the TOP of the tire also increases. So if you are trying to say pressure at a particular spot increases, then it does, but if you are saying the pressure inside the tire as a whole increases, then that is incorrect.

Amount of air nor pressure inside the whole tire does not change. If you want to create formula's that explain the pressures of a specific surface area, thats beyond my knowledge.