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I was going to wait to post this because I wanted to look in my records to see how many years and miles I have on this set of tires but... heck with it.
I stopped by a tire shop to borrow their tread depth gauge a while back to see how my inflation strategy was working. F150, tires only a few years old, I'd guess less than 20,000 miles. From new I tried 50 psi (44 sidewall max) but it rode like it had solid tires so I backed off to 46, which they've been at practically the whole time. The center is wearing faster than either of the sides, front and rear, on both sides. So I'm going to back off at least 4 psi and see how that goes.
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