the notion of "dialing UP" tire inflation pressures has been around a long time.
in fact we've addressed it HERE in the forums dozens of times over the years...
as an example see post #22 from this 2005 thread...
it's an old school approach and CAN work, but takes a LOT of tinkering.
really there is no valid reasons to follow that approach in modern daze.
IF planning to use ANY PRESSURE less than the max/sidewall for ST tires...
weigh the rig.
start with pressures based on one of the manufacturer tables...
keep in mind these tables are NOT recommended inflation guides.
ADD 5-10 psi if planning to drive OVER 65 mph (not to exceed sidewall pressure ratings)...
and be done with it.
IF using a tpms that provides temps, one can fiddle a lot more.
but be advised that south side tires will run 10-20 degrees higher in daytimes...
and tires with HIGHER loads will run hotter.
or tires with ANY brake, bearing, hub issues may run hotter.
and so on,
there are lots of reasons for variations that will BEFUDDLE tinkering with warm tire inflations.
the old "dial it UP" wisdom for adding air during travel was really intended for passenger cars/tires...
and from the earliest days of radial tire use
when LOOKING at the sidewall bulge was confusing compared to bias ply tires.