10 ply tire PSI when towing

Can anyone give me suggestions for what PSI to run my tires at when towing my 7000lb travel travel trailer ?

Tires are Hercules Terra Trac A/T 2 , 10 Ply load E , 275 65 18 ( stock size )

I currently run them unloaded at 48 psi , Drives smooth , good tread wear

I know these tires are overkill for my 2019 CM but I prefer the added strength and stability for towing .

 

My load range E bfgs are at 55psi towing. Feels really good. Rides like a pogo stick when we unhook lol

 

In actuality, unless we know your trucks weights/tongue weight....we cannot give you a definite answer.

Tire pressures depend on weights.

 

Truck probably weights 6500lbs give or take loaded , and tongue weight of trailer is 700lbs

 

6500 including tongue weight I hope?

 

Your tires are 3415lbs @ 80 psi.

Below is the math, by no means concrete evidence. Best thing to do would be reach out to Hurcules directly for their recommendation.

3415 x 4 = 13660lbs at 80psi for all 4

6500lbs/13660lbs = .48
6500lbs + 700lbs = 7200/13660lbs = .53

By math,

80psi x .48 = 38psi
80psi x .53 = 42psi

 

I appreciate all that work man , I actually did contact hercules when I bought the tires last year and they would only tell me the minimum pressure to run unloaded , I guess for legal and liability reasons they could not tell me any other numbers strictly because my truck did not originally come with 10 plys . I was surprised and a little disappointed

 

Very well could be which is why I added a disclaimer to my math as well

I do want to double back though and confirm...

You are 6500lbs with the tongue weight included, correct?

 

yes that is correct !

 

Cool, I read the original reply a little differently.

 

Hercules did tell me to run a minimum of 48psi . thats what ive been doing and all had been good , however when towing ive just been guessing and putting them up to 55 and havent had issues , but I wanted you guys opinion or experience on the subject .

 

I tow a 6500lb boat/trailer (give or take a couple hundred) with about a 550lb tongue weight.

With my old LT tires, I'd tow on about 35psi without ever having issues.

 

Interesting , I wonder if it differs from one manufacture to the next

 

Shouldnt be for a given tire size with a specific load rating, I believe its standardized for uniformity.