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Tricksy Tires

1956 Views 12 Replies 6 Participants Last post by  Dgate
Something very strange occured the last time I checked the pressure of my Insight's rear tires. It was a cold morning, and the car had been sitting for a while, so I thought it would be a perfect time for an accurate reading. I was totally unsuspecting of the perplexing trick my car was about to play on me.

I usually keep the rear tires at a pressure of around 38psi. First, I checked the left tire, for that tire tends to lose air faster than the others. This time it was unusually low, at around 30psi. Then, I moved around to the right tire, which normally remains at a constant pressure. However, when I looked at the gauge, it read 42psi.

I have no idea how or why this tire had a greater psi than what I inflated it to, especially after driving the car so long without filling the tires. It was also very cold that morning, and I had not driven it for a few days, so I can't see how heat might have caused the air to expand. All the other tires were almost as low as the first one I checked.

Unless someone is playing a joke on me and adding air to that tire behind my back, I am mystified. Or do tires sometimes do this spontaneously?

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