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Originally Posted by CurlyDave
This may come as a complete shock to you, but there is very little relationship between the psi in a tire and the ground loading.
The air pressure stiffens the tire sidewalls, which is what holds up the vehicle.
This seems grossly counterintuitive to anyone who is not a mechanical engineer, but it is true.
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Actually, not a shock at all, since that's exactly what I was arguing to my friend with the tracked skidder.
John Mc
(Not a mechanical Engineer, nor do I play one on TV. I didn't even stay at a Holiday Inn Express last night. ... however, these references probably indicate that I've been watching too much TV, and could be suffering severe decay of brain function as a result)