Originally Posted by Colotow
max rating on sidewall (weight) will then say "AT XX PSI COLD"
After the ford exploder tire fiasco, I always figured the people making the tires know more htan the truck maker, running the tires softer just lets it ride a little smoother. I go with the tire makers numbers
think of it this way: less pressure=more sidewall flex=more heat=tire deterioration
and, pulling a trailer, it will handle a bit better, less sway if you pump the tires up closer to the max COLD inflation. no compressor? let it sit overnight, 5 or 10 miles will not get them warm enough to matter to air up at a filling station.
just get a decent quality pressure gauge, don't trust the ones at the station
that's based on 15 years in heavy trucks and heavy wreckers- i've scaled with 55,000 lbs on tandems- yeah, way overweight and a slow trip, but in 500,000+ miles I've never blown a tire, either!
Lots of words, but didnt answer the guys question...
Sidewall is COLD pressure, it isnt MAX pressure. Air is expected to heat up
as you roll down the road, if you lets some out then you will underinflate
Truck is designed to pull 10k-lbs, and haul a good amount lower than what
a 5500-lb trailer will have. No need to max out the tires, but need more
than unloaded pressure to add some sidewall stiffness. Number on door
are for max load on the truck, your not going to have max load so you
can run lower pressure in the tires. See the numbers on my post above
for pressures that should work fine.