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Old 04-04-2015, 04:53 PM   #1
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Tire pressure

First of all... I have done so much to this trailer and it is looking amazing! I painted all the yellowing outside lights and vents with krylon for plastics, rustoleum for the hitch and everything under the trailer (metal). Replaced all the marker lights and rear lights and recaulked all the windows and edges. And repaired the roof.... Whew! So now my question is... When towing, what pressure do I fill my truck tires to? Max?

I want to also take a second to thank everyone for helping me learn about this thing... You have all saved my bacon big time!

2 weeks till the maiden trip and still have to get propane filled, batteries, axel bearings greased and test everything... Hope I can get it all done!!
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Old 04-04-2015, 06:00 PM   #2
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max unless you know the weight rating of tires per poundage and the individual weight of each tire on your camper. For most of us, max.
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Old 04-04-2015, 10:17 PM   #3
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What are your tires rated for, and how old are they?
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Old 04-05-2015, 01:01 AM   #4
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Your truck's tire placard, certification label and owner's manual all tell you what tire inflation pressures to use for Original Equipment tires. The owner's manual will describe what to use when hauling a trailer IF an increase is needed.

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Old 04-05-2015, 09:42 AM   #5
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With my F150 and P-rated tires, I aired them to the max of 44 lbs. With my F350, my door label says 65 front and 80 rear which I have to assume is for maximum load for my E-rated tires. I will consult my manual, but with a pin weight of 1800 lbs in a truck rated for 3200 lbs, I suspect I will run 60 and 70-75 psi. I need to weigh the new rig before making any adjustments.
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Old 04-05-2015, 01:09 PM   #6
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I'm sorry. Didn't read close enough. I was referring to your camper, not the truck.
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Old 04-05-2015, 03:20 PM   #7
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Depending on which tire you have will be the max cast into the sidewall. A common trailer size is a 235x85-16 'E' rated tire. That tire has an 80 psig fill pressure for the max rating of 3042 if it's an LT(it's actually a bit more @3169 with a Q index). If it's a Tow Max or similar ST, that's 3640 @80 psig with no max margin.

This is the Bridgestone site with a .pdf chart of commercial inflation ratings for light and medium duty tires(others are about the same): Bridgestone Commercial Truck Tires and see page 9
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Old 04-05-2015, 03:32 PM   #8
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As long as the truck is not overloaded it will be the sticker in door jam pressure. It is rated at what the truck needs for load. Now if you have changed size of tires ???
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