Originally Posted by Herk7769
If you run more than 10 PSI over the required pressure for the actual load on the tire, won't you get uneven tire wear due to the overpressure?
In order to keep all the tread face in contact with the road, the recommended tire pressure for the load is, well, recommended; No?
Running +10 psi over what is needed to carry the load on a high pressure tire (more than 79 psi) is not going to generate significant if any irregular wear. The irregular wear examples you show are more from the bias tire rather than radial tire days.
However lets say the weight indicates 70 psi is needed for the load. When you run down the road the hot pressure will increase because of the extra flexing of the tire due to it being heavily loaded.
Now suppose you run +10% (my suggestion) + round up to 80. The tire will deflect less so it will generate less heat so the hot pressure will not increase as much so part of the +10% is offset by less pressure growth due to less flexing.
Another item with TT usage is that it is very unusual for tires to wear out in the nominal 3 year life of a TT tire so a little more center wear, if it occurs, is not going to be a meaningful issue.
Given the choice I would prefer a tire removal at 4 years due to center wear rather than a tire removal at 3 years due to tread separation.
Inflation in the table is the indicated minimum inflation not necessarily the best compromise between wear and durability.