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Bill, UFO,
I think you are saying that tires built to this standard will only show a sidewall ptressure 35 psi. If you think this, then I want you to go down to either a GM dealer or a Ford dealer and pick out a midsize or full sized car (not truck!) and examine those tires. If the tires are NOT a Michelin, a Uniroyal, or a Goodrich, you will find the tires say something other than 35 psi max.
Allow me to explain why the above paragraph will prove you wrong.
1) The page I published is from the US tire standradizing organization, and while some vehicle manufacturers use that standard, the only ones I am absolutely sure will use it consistently are Ford and GM.
2) Why mid size or full size? Because both Ford and GM cars on their lots that were not designed in the US and may not be using P metric tires - but they would all be small cars.
3) Why car, not truck? Beacuse some full size trucks come with LT metric tires - and that's a different standard all together.
4) Why not the Michelin group (Michelin, Uniroyal, and Goodrich)? Because they are the only ones who will show 35 psi on their S and T rated tires. Everyone else will show 44 or 51 psi!
With those restrictions, you will find tires that were built to the US tire standards that have 44 or 51 psi listed as a max pressure on the sidewall - not 35 psi.
Ergo, the rated pressure of 35 psi for P metric tires is not always written on the sidewall.
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