towing tire pressure

[ringneck]

2005 3500 quad ram,32 foot 5th.tires on ram 235 80 17 on 5thw or 235 85 16 ,what air pressure i should tow with.what pressure not towing on my ram dually.i put 70psi in all 10 tires .tires say 80 max,ribs on 5thw and michlens ms on ram.its a 4by 4

 

[KATOOM]

Are the trailer tires LT or ST? If they're ST's then I say run them at max psi all the time. If they're LT then you can run them according to the weight placed on them. But just note that when you're talking trailer tires, no matter if they're LT or ST, the closer the air pressure is to the maximum amount the cooler they run. Sometimes based on towing speeds, its necessary to run up to 10 psi over maximum, but thats not for all tires and should be confirmed with the tire manufacture.

As for the truck, well that also depends on what the tires are rated for and how much pin weight is sitting on the axles. Best to run the truck and trailer through a CAT scale to understand how much weight is sitting on each axle. Then there's no guessing.

 

[shorthorn]

Here is what I do...

- Front tires of the Dually - 80 PSI
- Dually Rear tires (towing) - 65 PSI
- Dually Rear tires (not towing) - 50 PSI
- RV Tires - At max pressure listed on sidewall (80 PSI for my 16" load range E tires on my 5er).

 

[Dieselnerd]

Here is what I do...

- Front tires of the Dually - 80 PSI
- Dually Rear tires (towing) - 65 PSI
- Dually Rear tires (not towing) - 50 PSI
- RV Tires - At max pressure listed on sidewall (80 PSI for my 16" load range E tires on my 5er).

I do the same except I never lower the rear tire pressure below 65# on my dually because when I'm not towing, my Lance camper is in the bed.