Well I'm sure they've lost a tiny bit of air over time so they should be fine. =P
First off though, keep in mind I have the Perf W&T Pckg, so the rubber might be different than what yours has.
Btw, it's not over-inflated, as it's not above the max psi numbers for the tires, so it's certainly safe, and my general line of thinking is that a little harder will wear better than a little too soft will.
#8 311.0--------15.893----19.568
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