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Old 04-15-2009, 11:00 PM   #1
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1973 31' Sovereign
alameda , California
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TV tire pressure

What PSI should have my rear TV's tires at with trailer attached? I'm towing a 31' Sovereign, I have 235 75 15 BFG all terrains normally at 30 PSI.
I found this thread: howieE)
but I'm wondering about my TV's rear axle tire pressure.

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Old 04-16-2009, 12:10 AM   #2
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1993 21' Sovereign
Colfax , North Carolina
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If it's the F150 in your profile, 35 PSI all around would be good. If you have extra load tires, you can run them up to 41. It'll say "maximum inflation 41psi" if they are.

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Old 04-16-2009, 04:06 AM   #3
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Ruben J,

Your 73 - 31 footer should be close to my 87 - 29 footer on total trailer weight(7300# leaving out) and hitch weight (1030#).

If your tires have an "LT" in the sidewall description, this would be better. An LT has a heavier bead and upper sidewall. The LT's should be the 41-42 psi. All tires are suppose to meet RMA standards. A load range C is suppose to carry 2150# per tire and a load range D is suppose to carry 2540# per tire. The sidewall will tell you at what pressure. The table you refer to and RMA (Rubber Manufacturers Association) should be the same for the max load on a particular tire.

I personally don't like to run anywhere near the max calculations. I have had serious tire people tell me to think about discounting the max load by about 5-10% per year as the tire ages. Also, a tire inflated at less than max inflation may not with stand a chuckhole or object in the road. Also, higher inflation generally equates with less rolling resistance and last, if your rig is near out of control, I want the truck tire to stay on the bead and not be rolled off and loose inflation. Higher pressure also equate to stiffer sidewalls and less steering movement on the road.

Just my $.02
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Old 04-16-2009, 05:44 AM   #4
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1989 34' Excella
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I would go with the highest tire pressure that is recommended by the tire manufacturer and the rating of the truck manu. I have found the best sway stability with the higher pressures as well as best gas mileage and least tire heat. Drop it a few pounds, if you feel the ride is too rough for you and the trailer.
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Old 04-16-2009, 08:47 AM   #5
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With your trailer hitched up go the a Cat scale and weigh each axle on the TV and the trailer axles as a set and use the chart to find the correct pressure. Most scales have 3 plates and you should be able to get all 3 measurements in one pass over the scale.

Once you have the TV tires set for towing there is no reason the lower the pressure of none towing applications unless you have prolonged periods that you are not towing. The difference will most likely be less that 5 PSI
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Old 04-16-2009, 08:59 AM   #6
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Originally Posted by Ruben J View Post
What PSI should have my rear TV's tires at with trailer attached? I'm towing a 31' Sovereign, I have 235 75 15 BFG all terrains normally at 30 PSI.
I found this thread: howieE)
but I'm wondering about my TV's rear axle tire pressure.
You need to consider your front tires aas well. With a Wd hitch you are transfering weight to them as well.
I have had two F-250s. My first one was 55 front, 65 rear. Max 80.
My second one which I still have it 75 front, 75 rear. Max 80. I set both front and rear to 80 when towing my 06 31 Classic.
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Old 04-16-2009, 09:08 AM   #7
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I just bought a pair of LT 225 75R 16s The tire guy told me to run them from 65- 85 psi.

It also depends on your vehicle. I have a F250 which is a little stiff. To cut down on road shock to the trailer I plan to run them at about 50# in the rears. I'm not sure if it's a good idea to run them at a lower pressure that 50.

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