11/21/2023 0 Comments Spare tire psi![]() ![]() So all the stuff you have stored in there needs to come out first. In a four-door sedan, the spare is most likely buried in the trunk. (This is best done at home, under controlled circumstances) The biggest trick is going to be GETTING to your spare tire.įirst, you have to locate where your spare tire is at. Press the air pressure gauge against the valve stem and get the spare tire air pressureįor more complete instructions click here.To recap, find the valve stem on your spare tire.Use a tire pressure gauge to measure the air pressure in your tires. Sooo, how do you go about doing this?Ĭhecking the air in your spare tire is just like checking the air in your regular tires. Good job, you are doing what you are supposed to do. How do you Check the Air in Your Spare Tire? Second, if your spare is low you can now inflate it enough to get you on the road again. First, you may be able to inflate your primary tire long enough to get it repaired. Then, when you need it the most, it will not be there for you.Ĭarrying a small air compressor with you may not be a bad idea. Since tires don't just lose pressure during National Tire Safety Week, maybe the event needs to be held all year long and become simply an ongoing initiative for National Tire Safety Awareness.It is recommended that you check the tire pressure in your spare tire every tire rotation or every 6,000-8,000 miles.Įven though your spare tire isn’t doing anything, air can still leak out. Tire Rack recommends that all drivers check and adjust cold tire inflation pressures of all tires, including the spare, at least once a month or before taking any extended highway trips. While maintaining correct tire pressures is a common problem, these results emphasize how little importance drivers place on maintaining them and the spare. Even if they were driven on while underinflated for a short period of time at relatively low speeds, the bond between their rubber compounds and reinforcing cords would have been weakened forever. Since tires require inflation pressure to provide load capacity, if any of these tires had been placed into service without increasing their inflation pressures, they would have been underinflated, overloaded and a catastrophic failure waiting to happen. Full-size spare specifying 32 psi inflated to 16 psi (50% underinflated)Ī Spare Tire is no Spare Without Enough Air.Mini-spare specifying 60 psi inflated to 17 psi (70% underinflated).Full-size spare specifying 29 psi inflated to 22 psi (25% underinflated).What did we find? Surprising results that could lead to catastrophic consequences if these spares were put into service. Full-size spares typically specify the same pressures as the other tires on the vehicle while the smaller, temporary-use mini-spares require 60 psi to develop enough load capacity to carry the vehicle. In addition to simply resetting the tire pressures of the four tires on the ground, we also checked the air pressure of the spare tires as well.Ĭars and light trucks can be equipped with several types of spare tires, ranging from full-size spares that are identical to the other tires on the vehicle to narrower and often shorter diameter mini-spares. Hence, the industry recommendations to check tire pressures at least on a monthly basis.Īs a test, we checked, recorded and reset the pressures in the tires on the students' vehicles used for one of our Tire Rack Street Survival Teen Driving Schools held at our South Bend headquarters. And while air also escapes through the rubber of tires for cars and trucks, today's more robust tubeless tire designs experience air pressure losses of only about one psi per month. ![]() What happens to rubber balloons in the days after a party? The air pressure inside them escapes through the rubber and the balloons go flat.
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