Some of these points have been discussed. Tire pressure in relation to the failure caused by different surfaces say rocks and pot holes, for example. The big take away here is optimization. Each "car" location of use and actual usage ( laden be unladen) will determine best pressure. Can you imagine you stop to pick some one up and need to increase you tire pressure by two PSI.
One area of interest was negative space and tire pressure but for most of us we drive various surfaces. This is more relevant to racing than everyday.
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