Forum Discussion
HMS_Beagle
Jun 18, 2017Explorer
Reality Check wrote:
I have to ask; what does air pressure in a tire have to do with ground pressure? What am I missing there? My truck tires go from 32 to 110, but the load on the ground doesn't change unless the footprint does.
Since the load on the ground is the same, the footprint has to change. If you ignore the stiffness of the tire carcass (which can be considerable), then the PSI in the tire = the PSI on the ground.
This is the very reason you air down the tires for sand.
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