Originally posted by qqq
I know for sure that tires do not loose 1 psi each month...I have too many examples of storage yards full of static trailers with fully inflated tires after ten years.
My car, truck & trailor tires rarely need airing up
When I was trained in the selling and servicing of tires, longer ago than I like to think about, when Michelin was about the only radial tire available here, our Michelin tire service handbook told us it was very important to check tire pressure monthly, as tires tend to lose air through the schrader valve in the valve stem, to the tune of one psi per month. That is why so many cars are running around with underinflated tires here in North America, no one checks them month after month, and after a year or so of driving, they can be down by 10-12 psi. In a tire that is supposed to have 30psi, and is 12psi low, it would not take much for a tire with 18psi to suffer a failure.
I don't make this stuff up, I just repeat what I am taught...and in this case, I find it more the rule than the exception.