tire pressure

lee worsdell wrote:
Wonder what pressures I should run on my truck. 2017 gmc 3500 dually pulling a 15800 loaded trailer. I have a bit of back and fourth movement right now thought I would start with tire pressure. Have a tri glide pin box that had the bottom plate welded solid. Just put my b w back in last night took out the reese. Try that also.

Look on the side of your tires and you will see some raised letters telling you what is the min and max tire pressure for your tire. I would also double check to make sure your rim is designed and has the load capacity to hold the max tire pressure of your tire. On the inside of the rim there should also be written the max capacity of that specific rim. When in doubt, I drive my trailer to my local Les Schwab tire shop and they can tell you. With my 5th wheel at 14K when loaded i put 110lbs. of air pressure in the tires.

Use what pressures are listed on the door sticker.

Rob

Second Chance wrote:
Use what pressures are listed on the door sticker.

Rob

Correct answer^^^^!

Dually pickup do NOT need rear tires inflated to max sidewall inflation numbers, as the load to spread across 4 tires. Chris

Me Again wrote:

Second Chance wrote:
Use what pressures are listed on the door sticker.

Rob

Correct answer^^^^!

Dually pickup do NOT need rear tires inflated to max sidewall inflation numbers, as the load to spread across 4 tires. Chris

And that's what caused all the tire failures on those Fords years ago. Imagine an Expedition loaded with a family and luggage and the tires inflated to the door sticker...which was 28 lbs. No wonder the tires failed and killed all those people. Stupidity from Ford and stupidity by the car owners who blindly followed along.

Lyle

I always use the maximum pressure shown on the sidewall of the tire when towing.

My door sticker says: Front - 70 psi, Rear - 65 psi. Been towing a 19,000 pound TH with those pressures for 3.5 years now with excellent tire wear and no tire failure issues. I run Michelin truck tires on my TH and never run max pressure. I keep it at 70 psi. Michelin charts say psi should be 65 psi as each tire is never over 2600 pounds loaded. Again, good tire wear and no tire failures in 3.5 years.

BTW, the tire failures were all Firestone tire related and the tires were bad, not the sticker on the door. Firestone recalled 28 million tires and closed the plant that made them. Also, the owner's manuals dictated proper inflation pressures for carrying loads (if they were ever read).

I had a visit to Discount Tires (New Store) in Medford Oregon on Friday,

They say inflate truck (GMC Dually 1 ton)to specs on Door 65 psi all round and you should inflate trailer to max pressure shown on tire. In my case 65 psi. having done as suggested by Discount, my trip south on I 5 was smoother and produced 10.9 mpg verses 9.2 previously recorded.

use door sticker not tire ratings

by back and forth I take it you mean ''chucking'' tires arent going to cause this

Are you level?
Did it just start? if so what changed?
whats your pin weight?

azdryheat wrote:
My door sticker says: Front - 70 psi, Rear - 65 psi. Been towing a 19,000 pound TH with those pressures for 3.5 years now with excellent tire wear and no tire failure issues. I run Michelin truck tires on my TH and never run max pressure. I keep it at 70 psi. Michelin charts say psi should be 65 psi as each tire is never over 2600 pounds loaded. Again, good tire wear and no tire failures in 3.5 years.

BTW, the tire failures were all Firestone tire related and the tires were bad, not the sticker on the door. Firestone recalled 28 million tires and closed the plant that made them. Also, the owner's manuals dictated proper inflation pressures for carrying loads (if they were ever read).

My 07 Dodge 3500 DRW gives the same pressure of 65psi for max load for rear tires this is for a 235/80/17 E, hope this helps.

laknox wrote:

Me Again wrote:

Second Chance wrote:
Use what pressures are listed on the door sticker.

Rob

Correct answer^^^^!

Dually pickup do NOT need rear tires inflated to max sidewall inflation numbers, as the load to spread across 4 tires. Chris

And that's what caused all the tire failures on those Fords years ago. Imagine an Expedition loaded with a family and luggage and the tires inflated to the door sticker...which was 28 lbs. No wonder the tires failed and killed all those people. Stupidity from Ford and stupidity by the car owners who blindly followed along.

Lyle

The sticker on my door for my Ram dually is 65#. At 65# this is for a rear axle rating of 9700#. My rear axle only weighs just over 3500#. Take the rear GAWR of 9700# and subtract the 3500# rear axle scaled weight it leaves me with 6200# capacity. If I fill my tires to the max pressure of 80# I would have over 13,000# rear axle capacity. There is no way that I need to have that much rear capacity and it would also ride like a hay wagon with no give.

It is different if you are a SRW but what holds for a SRW does not hold true for a dually.