The tire pressure on the sidewall, (yes, it's there - in very small type) is the MAX cold pressure and bears no reality to what the auto manufacturer specifies. Many 16" tires specify 44psi max, but the car needs pressure usually in the 28-35 range.
You should look at the decal that specs the OE tire size and pressure. Most US cars it is on the driver's door in the jamb area, or in the door jamb itself. If not there, look on the inside of the console or glovebox. Second choice is to read the owner's manual - what a concept!
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