Or you could fill with nitrogen and never have to worry about the PSI changing due to outside temperatures. Just tell them you want it 5 PSI over when they do it. Kind of expensive though, for trucks at my local tire shop its like $100 per wheel. Be worth it I guess if you never had a flat and didn't change the tires until they were completely wore out. And you had them filled with the nitrogen when they were brand new.
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