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Old 03-27-2014, 09:04 PM   #1
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Tire Pressure While Towing

Curious. I was towing my travel trailer home from the dealership this morning and noticed that the rear tires increased in air pressure more than the front tires. Does anyone know if this is normal? I noticed this when checking the on board computer in my truck for air pressure in the tires.
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Old 03-27-2014, 09:11 PM   #2
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Trailer or truck tires? If more weight is carried by tires, they will heat more. Same for diff air pressure. Mine will show a few pounds diff by traveling in the sun or shade.
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Old 03-27-2014, 09:11 PM   #3
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Literally was researching the very same issue this evening! I discovered that handling under loaded conditions running P rated tires can be improved by running the tires closer to max sidewall pressure instead of the pressure listed on the door pillar.

It logically follows that tire pressure would increase with a load on the tire, so I would expect an increase in pressure while towing, but I've never checked before...
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Old 03-27-2014, 10:19 PM   #4
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weight and friction = increased temps, which results in increased pressures, it is normal, but if not managed it results in tire failure
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Old 03-28-2014, 05:47 AM   #5
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I always wondered what happens when you put max pressure in P tires and naturally, temperature increases while towing, then there is more pressure in the tire than sidewall max. Isn't that exeding tire capacity?
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Old 03-28-2014, 05:58 AM   #6
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I was wondering the same thing myself.
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Old 03-28-2014, 06:58 AM   #7
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Thats why you check and fill while cold. I think the tire engineers know it will increase while towing in the summer through Arizona..Lol
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Old 03-28-2014, 07:37 AM   #8
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No, what I'm wondering is if when towing it is helpful to inflate the tow vehicles rear tires beyond the door placard's recommendation.
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Old 03-28-2014, 08:12 AM   #9
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No, what I'm wondering is if when towing it is helpful to inflate the tow vehicles rear tires beyond the door placard's recommendation.
When towing on P tires, I always put in the max pressure listed on the sidewall.
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Old 03-28-2014, 08:22 AM   #10
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No, what I'm wondering is if when towing it is helpful to inflate the tow vehicles rear tires beyond the door placard's recommendation.
I run E load so I am always at 80 in the rear. But when I had my half ton, before I had E load tires on it as well, I always ran the max cold pressure on the tire. The door placard is to low for even non towing in my opionion. I ran 35 PSI when not towing and max cold listed on the tire when towing..
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