Originally Posted by
smd4
Dumb comparison.
That was what I thought when you made it.
The question isn’t about materials, its about factors of safety.
You think a manufacturer isn’t going to build in some extra safety on top of its “max” recommendation?
Of course. However, assuming you know what that factor is is a game for fools. Plus, it's not just the possibility of the rim blowing apart. They're also telling you that you can trust the hook to hold a bead up to that pressure. They're also telling you NOT to trust the hook to hold a bead above that pressure.