Therefore it is the vehicle manufacturers that ultimately determine the tire inflation pressures they believe best fine-tune the tires' capabilities to their specific vehicle makes and models.

The pounds per square inch (psi) pressure number branded on the tire's sidewall identifies the maximum cold inflation pressure that specific tire is rated to hold. However, the tire's maximum pressure is not necessarily the correct pressure for every vehicle upon which the tire can be used (almost all vehicle manufacturers' recommended tire inflation pressures are less than the tires' maximum pressure).