The manufacturer’s recommended pressure can be found on a label that’s on the drivers door jamb or driver’s interior door edge. The label is called the “placard,” and the correct pressure is called the “placard pressure.” The recommended pressure is based on reading the pressure when the tire is ‘cold’ - that is when it has not been driven recently. If you measure the tire after it’s been recently driven, you’ll get a higher pressure than if it’s measured ‘cold.’