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Totally agree with JGL. Even if gages are off by up to 5 psi, that could mean you are at 70 psi. Run at 80 psi then the gauge error will be ok. Always check pressure when tires are cold. Tire pressures also change 1 psi for every 10 degress of temperature change. This mean if you set your cold tire pressure to 80 psi at 40 degree temperture, then travel to a hot 90 degree temperature then your cold tire pressure will be 5 psi higher. The opposite happens when it is reversed.
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