The correct air pressure level for Goodyear tires depends on the make, model and weight of the car. This information can be found in your vehicle's owner's manual, on the sticker on the driver's side doorjamb, or in the glove box.
The maximum air pressure for Goodyear products varies depending on the size of the tire, and it can be found on the exterior side wall of the tire. This is an absolute maximum that is not ideal for every vehicle. Temperature changes in the environment and heat caused by friction while driving can change the tire pressure dramatically. Check tire pressure levels at least once a month.