Looks like 30psi ought to be plenty good for towing
Well not really, but no wonder there is so much confusion on the topic!
I have a 2006 GMC Yukon Denali XL with the factory tow package. I'm getting things set up to tow a 2019 Jayco X23E, which is around 6000lbs ready to travel. I don't know the tongue weight yet, but I'm guessing it's around 750lbs.
The door sticker lists the cold pressure as 30psi, with no additional ratings for increased loading:
The manual doesn't say much about the label:
It mentions a bit about not underinflating or overinflating:
and most interestingly, states that "The recommended cold tire
inflation pressure, shown on the label, is the minimum
amount of air pressure needed to support your vehicle’s
maximum load carrying capacity":
So 30psi is the minimum, and apparently I'm free to go above that. But how far above?
I'm running Vogue Signature V SCT tires in a P275/55R20 fitment. They are XL load range P tires, and the sidewall max pressure is 50psi.
The Tire and Rim Association (TRA) inflation tables for this tire size gives ratings up to 35psi.
My thinking at the moment is:
Does this seem like a reasonable starting point?
I have a 2006 GMC Yukon Denali XL with the factory tow package. I'm getting things set up to tow a 2019 Jayco X23E, which is around 6000lbs ready to travel. I don't know the tongue weight yet, but I'm guessing it's around 750lbs.
The door sticker lists the cold pressure as 30psi, with no additional ratings for increased loading:
The manual doesn't say much about the label:
It mentions a bit about not underinflating or overinflating:
and most interestingly, states that "The recommended cold tire
inflation pressure, shown on the label, is the minimum
amount of air pressure needed to support your vehicle’s
maximum load carrying capacity":
So 30psi is the minimum, and apparently I'm free to go above that. But how far above?
I'm running Vogue Signature V SCT tires in a P275/55R20 fitment. They are XL load range P tires, and the sidewall max pressure is 50psi.
The Tire and Rim Association (TRA) inflation tables for this tire size gives ratings up to 35psi.
My thinking at the moment is:
- Since I'm aiming for the hitched-up front axle weight to be only 100lbs above the unhitched weight, I'll run 35psi cold in the front.
- Since the rest of the tongue weight will be on the rear axle, plus I'd like to minimize squirm near the pivot point, I'll run 40psi cold in the rear.
Does this seem like a reasonable starting point?
