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My Goodyear Endurance cold pressure says 110 psi. I just finished a long trip in Wyoming with 95 degree temps. My TPMS showed them slowly increase to approx 121 psi driving 65 moh. One tire was about 108 at start, and I noticed it heated up more (just by the greater increase in osi) than the one behind it. I balanced the air pressures at the next stop and noticed they all increased exactly the same psi after driving a while. Like someone said on a previous thread, the high number is not as important as the differential increase between tires, which can indicate a bad bearing or dragging brake.
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