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How Much Air Should I Put In My Tires? What Air Pressure Should I Use?

Which air pressure rating do you use when filling up your tires?

The one posted on the vehicle by your manufacture or the rating on the side wall of the tire that is recommended by the tire manufacture?

For instance vehicle says 32psi on the door panel and the sidewall of the tire says max air pressure rating 44psi.

Do you know what the consequences will be based on which rating you choose to use?

What happens if you use the tire pressure rating on the tire?

For one they will last much longer and two you will get better fuel mileage.

However you will sacrifice ride quality. Basically the vehicle is going to have a much firmer ride.
On sports cars, SUV’S and trucks which already ride firm it can be a dramatic difference.

The manufacture wants the vehicle to have a smooth, comfortable and reliable ride. Therefore they are willing to sacrifice tire wear and fuel mileage for ride quality.

At Professional Fleet (near East Lansing) we leave it up to our customer or inflate the tire somewhere in the middle of the high (tire side wall) and low pressure (manufacture) rating. If the vehicle rides to firm we can always back it down a few psi.

Remember when all those Firestone tires were blowing out and causing roll over accidents?
It was because of under inflated tires which caused the sidewall of the tire to become weak and “roll”.

If you use the tire pressure stated on the vehicle by the manufacture then the tires will wear out sooner. Usually we see severe wear on both the inside and outside edge of the tire. The center of the tire will still have plenty of tread.

Typically the tire will only last half of it’s tread mileage rating.
The tire store will not warranty them because they will tell you they were under inflated therefore you voided the tread warranty.

Ford new this was a problem way before the Firestone tires started blowing apart and it became public knowledge.