Your calculations are correct.
If you feel any one of the tires getting warmer than the others the loading may be asymetrical so try adding 5psi.
lawrosa wrote:
IMO put max psi in all tires when towing... keeps heat down period......
Nothing like a reccomendation that goes against every tire manufacturers recommendation.
Does too much pressure keep heat down....yes it does, but there are plenty of negatives.
Too much pressure will reduce tire life from uneven wear, it will reduce traction, it also increases the susceptibility to road hazard, as well as makes the ride worse.
There are far more reasons not to run max pressure at any load than there are to run max pressure at any load.
