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Asked by Tomasa Crooks
Cars & Vehicles
Brakes and Tires

Should I fill my car's tires to the max PSI on the tire or to my car manual's recommendations?

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Leann Raynor
December 09, 2019 10:45PM

You should not fill your car’s tires to the maximum PSI listed on the tire—go with the numbers in your car manual. These numbers are also likely on a sticker in your driver-side door jamb.

The maximum PSI, like the phrase would suggest, is the maximum pressure your tire can hold. It’s not, however, the recommended pressure for your vehicle. Overinflating tires can lead to uneven wear, poor handling, and even increased blowouts; underinflating them can lead to accelerated wear and, yep, increased blowouts. The recommended pressure is there to maximize long-term performance and safety.

The information on your tire is still important, though. In addition to the maximum PSI, you can find things like the tire type, load index, speed rating, various measurements, and adorably enough, even the week your tire was born.

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robmschn
December 18, 2019 5:34PM
No, NOT the max psi, but to make sure they are safely inflated, you DO want to check for the tire's COLD PSI, which is also right there on it.
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Bubbles
December 19, 2019 1:03PM
Yes