Dually tow vehicle tire pressure

Thank you everyone. I have been towing 5th wheels since 2001. Always kept front tires a little more than door sticker when towing. Started thinking and was curious. I will probably stay at 70 on front or maybe increase a little.

I run max air most of the time. With the truck camper it lessens the side wall flex and it doesn't hurt anything to keep it there for other loads . I have been keeping max air in all my truck and trailer tires for about 50 years without any problems. But this is just my practice. You can follow the door sticker and probably do just fine unless you are over the trucks rated weights. That's why running across a scale is always a good idea.

You'll never have a definitive answer unless you scale your truck. My Chevy dually carries little to NO additional weight on the front tires when my fiver is hitched-up Pin weight of 3500 pounds. I run the placarded psi at all times. No problems in 4 years.

Whether towing or empty I always keep the pressure at the maximum on the sidewall. I don't want to take the time to adjust the pressure depending on what I'm doing with the truck. Trucks are meant to ride rough....LOL

My dually has 2 recommendations for PSI - low weight and maximum weight. My maximum weight matches what you said- rears 65psi; front 70psi.

Why do you feel the need to increase it from there?

When towing my tires are 80 all around. In off season I drop them all to 50lbs, for a smoother ride.