New tire pressure ?

[Ahzmyrah]

Wow, this ain't rocket science. I am a former tire dealer and truck fleet operator and I have adjusted many, many tire failures for most of the major manufacturers. Tires fail primarily because they are either underated for the load they are carrying or if rated properly they were under inflated. Simple as that. Remember the Ford Explorer tire failures a few years ago. The tires spec'd by Firestone/Bridgestone were properly rated for the vehicle but the Ford engineers recommended a lower tire pressure for a "nice ride". Most people don't check there tire pressures unless a tire is obviously low. Load the vehicle up to max or tow a trailer and you have problems.

There is a lot of relevant information in this thread. The basics are these:

Know how much your rig weighs and that includes your tow vehicle. If you can't weigh it look at the owners manual to find empty weights and estimate what you are adding...it's ok to estimate too high.

Use a tire rated to carry a load heavier that your max load out plus at least a 10 or 15 percent safety margin.

It doesn't matter what A/S or your T/V manufacturer recommends. Inflate the tires to a pressure that will safely carry your calculated load. There are tables out on the internet posted by tire manufacturers that give pressures vs. load carrying capacities.

Don't get too anal it takes the fun out of things. Try checking your tires cold on a hot sunny day. First on the shady side of the trailer and then on the sun soaked side. Tires are black and they absorb heat. The sunnyside tires will have a significant difference in pressure from the cool side. The same thing happens when you go down the road. What do you do now?

We are in the middle of a trip right now that has included 118 degrees in Death Valley below sea level to 20 degrees in the Rockies at 9000 feet 10 days later. I run 225/75R15 load range E tires rated for 2880 lbs at 80 lbs pressure. I have them inflated to 65 lbs cold, check pressures before traveling and visually check and feel the tires and wheels at fuel and rest stops. We have close to 20k miles on them right now with minimal wear.