Quote:
Originally Posted by Carbonita
Good find! Is this the 2023 ETRTO standard year update?
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I believe, but can't substantiate since the ETRTO standards are behind some sort of paywall I think, that it follows the standards in terms of compatibility by indicating Yellow vs Gray boxes. The pressures I think they recommend, are based maybe on their own calculated logical progression of how rim width and tire width should impact max psi for every given combination, working backwards from a maximum. But, that's just my guess.
Nothing's perfect though. Someone could make a hookless tubeless tire with wire beads (non-foldable) perhaps, and claim a completely different ability to hold air at higher pressures (mounting them might be a pain perhaps :-).