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Old 10-11-2016, 11:39 AM   #11
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They are 275/65R/18 116T
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Old 10-11-2016, 11:54 AM   #12
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They are 275/65R/18 116T
The load index is 2756; you would exceed GVWR way before the tire rating.
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Old 10-11-2016, 01:04 PM   #13
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Now that we've sidetracked the OP's thread. I'm not sure they ever got a good answer.

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Hi: My question is, should I increase the tire pressure in my truck when towing?

Norm
I personally would increase the pressure to the max sidewall pressure when towing. It makes the sidewall a little stiffer and therefore helps with sway.
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Old 10-11-2016, 01:26 PM   #14
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Originally Posted by Seachaser186 View Post
and have more load rating than some LT tires.
If only the tire manufacturers would make it so easy.

There's a thing called "derating" when using a Passenger tire on a pickup or trailer. This thread may help explain that.

New 10 ply tires help

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To the OP's question, it would help to air up your tires to the max stated on the tire when using the trailer. However, knowing if that is too much or not enough, is really dependent on how much weight is on the tires, which can only be properly ascertained by weighing it on scales.
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Old 10-11-2016, 04:48 PM   #15
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Tow Pressure

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Originally Posted by Bama Rambler View Post
Now that we've sidetracked the OP's thread. I'm not sure they ever got a good answer.



I personally would increase the pressure to the max sidewall pressure when towing. It makes the sidewall a little stiffer and therefore helps with sway.
Agree!! go with MAX sidewall recommended pressure less a litle in the fornt. Worst case is a hard ride but without a blown tire. All things being equal!
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Old 10-11-2016, 05:25 PM   #16
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Can somebody answer this question? If you inflate to max psi for towing the psi will increase when the tires heat up. Is the max psi for a cold tire?
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Old 10-11-2016, 05:32 PM   #17
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Max pressure on the sidewall is cold. I towed a travel trailer with a Ford F150 and did raise the rear tire pressure to 50 PSI for my Bridgestone tires with a max of 55psi. If you have light truck tires that is what you do to prevent low pressure issue like rubbing the side wall.
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Old 10-11-2016, 05:41 PM   #18
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The reason I asked the question, there are those who are saying to inflate to max psi for towing. If you drive the psi will exceed the max. That is why I don't inflate to max to allow room for expansion.
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Old 10-11-2016, 08:51 PM   #19
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The pressure rating on the tire is always specified cold. The tire company takes the expansion into account. I've often wondered when it is 120 degrees in Phoenix if they really took all of the expansion into account. The General Services Administration supplies the Forest Service with Passenger tires on all of the pickups it sells us. They don't hold up like Light Truck tires. I had two flats the same day multiple times. You'll find that LT tires are more stable and last better, but they definitely ride rougher.
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Old 10-11-2016, 09:36 PM   #20
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The door plate on my Ram 3500 states max rear tire pressure when loaded is 75 PSI and 45 PSI with light load.

What is the major advantage in running the rear tires at a much lower pressure?

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