Tire Pressure Question

[traveler]

On my 2005 F350 SRW Power Stroke the max cold tire pressures on both the door plate and the tires was 80 psi cold. With the heavy MS pin weight, I needed that type of pressure to carry the load.

On my 2006 F350 DRW Power Stroke the door plate pressures-front and rear are 60 psi. I understand why the rear pressures are lower--more tires--but why did the door plate pressure decline from 80 to 60 psi. As far as I can tell the front of the trucks weigh about the same.

[BobW]

DRW

[wackum]

Just went out and checked my 06 F350 DRW and the door sticker
states 75 in the front and 60 in the rear

[traveler]

Wackem's response seems reasonable, but my front pressures (door plate) say 60 psi. I have an extended cab Lariat. I can't imagine why a King Ranch would call for 75 psi.

I am going to put this up on the trailer life website and see if I can get a wider review.

Will let you know what I find.

[rdunk]

I had a 2005 F350 DRW CC 4x4. and the door plate stated 65 psi front, and 60 psi rear. My 2006 F350 is identical to the 2005, except the 2006 is 2x4, and the door plate states 60psi front and rear. I have just assumed the difference in the front was related to the 4x4, which is about 500lbs heavier, mostly on the front axle.

I do believe we need to adjust the tire inflation as needed, up to the max tire psi/load ratings, as needed, for safely towing our gross weight loads.

[Stripit]

On my 2005 F350 SRW Power Stroke the max cold tire pressures on both the door plate and the tires was 80 psi cold. With the heavy MS pin weight, I needed that type of pressure to carry the load.

On my 2006 F350 DRW Power Stroke the door plate pressures-front and rear are 60 psi. I understand why the rear pressures are lower--more tires--but why did the door plate pressure decline from 80 to 60 psi. As far as I can tell the front of the trucks weigh about the same.

Are we talking exact same brand and size/load range tires on all these trucks? I see at least 3 different brands on the trucks we weigh.

[Motor31]

Has anyone weighed the trucks in question to get an idea what weight is actually being carried on each axle? That info along with the tire manufacturers tire inflation chart will give you the best guide to run the tires at. The same goes for the rear axle when hooked up to the trailer since you can run the rear tires at different pressures empty vs loaded to make the ride smoother.

This is assuming the tires are the appropriate load range for the loads expected and the rims will support the pressure the tires are capable of running at.