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Didn't know tire pressure changes that much with outside temp until last week
I've been driving for like 15 years and never once thought about how cold weather affects tire pressure. Last week it dropped from 70 to 20 degrees overnight here in Columbus and my low pressure light came on the next morning. I checked all four and they were sitting around 28 psi when they should be 35. Turns out for every 10 degrees the temp drops, you lose about 1 psi. So that 50 degree swing was basically 5 psi gone. I just thought I had a slow leak or something and almost paid $40 for a patch at the shop. My buddy who works at a dealership laughed at me and explained it. Now I keep a cheap digital gauge in my glovebox and check them when the seasons change. Anyone else ever panic about this before realizing it's just physics, or am I the only one who never learned this in driver's ed?
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noahw5322d ago
My wife is the one who pointed this out to me about two years ago, after I'd already spent $60 at Discount Tire thinking I had a puncture. I used to think TPMS lights meant something was actually broken, not just cold weather math. It honestly felt like I'd discovered a cheat code when she explained the 10 degree rule, now I just look at the forecast before I drive.
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