When was the last time you checked the air pressure in your spare tire?
The spare tire is a lot like a fire extinguisher: Hopefully you never need it. But when you do, you need it really, really bad. So it is important to remember to check the spare tire everytime you have all of your other tires checked.
Tires normally lose one psi each month due to air permeation thru the sidewall. It helps to think of a tire as a balloon – after time the air in a balloon will drop due to air leaking through the balloon’s surface. Air will dissipate through the tire’s sidewall in the same way. It is also important to note that with the change in seasons there is often a change in temperature – for every 10 degree (F) drop in ambient temperature a tire will lose one psi. And it’s the air that carries the load, so less air pressure means less load carrying capacity.
So, how do you check your tire pressure? Typically you can find the correct inflation pressure for your vehicle’s original tires on a sticker inside the driver’s side door jamb or in the vehicle owner’s manual. Be certain to check the tire pressure with a good tire gauge when the tire is cold. First thing in the morning is a great time.
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Tommy Wood
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