tires need air checking pressure
The sidewall information gives you MAX PSI and you should not use max. Start about 5PSI less than max and only go down from there for a more comfortable ride. Don't go lower than 32 PSI.
Without knowing the year/make/model of vehicle the tire is on how are we supposed to know what the correct pressure should be?
Usually, when you open your driver side door, on the car itself on the door jamb will be a label listing the appropriate manufacturer's inflation. If it's not there, check your car's manual. Inflate to whatever it says there. Tire inflation is based on the CAR, not the tire. The number listed on the sidewall of the tire is MAX pressure that the tire can be inflated. If you don't have a manual and there's no label, then inflate to about 34-38 PSI. That's usually an acceptable tire pressure for passenger class cars. The key thing is to make sure you're not too low on air (34-38 should probably be okay), as low air will allow the tire to deform, especially under speed and cornering, which generates a lot of heat, and eventually tire failure (blowout!) Also, whenever dealing with inflation pressures, you are talking about cold inflation pressures, meaning the car has sat overnight in the shade or a garage.
