Tire Pressure Question - Page 2 - Fiberglass RV


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Old 11-18-2015, 05:00 PM   #21
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Trailer: Scamp 16 ft Side Dinette
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Originally Posted by Byron Kinnaman View Post
In previous discussions on this subject there seems to be a misguided thought that you reduce the harness of the ride on the trailer by lowering the tire pressure. That's kind of the deal with Ford Explorer and Firestone a few years ago.

I have always and will continue to set the cold tire pressure to max side wall marked pressure.

It's your money, spent it as you wish. Just be aware too, that an overinflated tire is more susceptible to damage from rocks, sharp edges, curbs, etc. Hard impacts can break the ply cords inside, but that won't show up right away.
I will continue to opt for a softer ride. Yes, I do increase air in the rear tires in our TV to allow for the added load from the Scamp.
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Old 11-18-2015, 05:54 PM   #22
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Name: Norm and Ginny
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Originally Posted by Wayne Collins View Post
It's your money, spent it as you wish. Just be aware too, that an overinflated tire is more susceptible to damage from rocks, sharp edges, curbs, etc. Hard impacts can break the ply cords inside, but that won't show up right away.
I will continue to opt for a softer ride. Yes, I do increase air in the rear tires in our TV to allow for the added load from the Scamp.
Wayne,

On our first long trip with a small trailer we drove across Labrador, a 1000 mile dirt road at the time. We did lower the tire pressure on that road. We drove much slower, actual average speed 25 mph.
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Old 11-19-2015, 05:34 AM   #23
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Originally Posted by honda03842 View Post
Wayne,

I load mine to 50 PSI for four reasons. First, I have a Scamp 16 which weighs more than a Scamp 13. Second the side to side weight rarely is split equally between the tires on a flat surface. Third, As you drive along the weight on a tire can vary depending on road surface. Fourth as the trailer attempts to move from side to side, stiffer side walls are helpful.

To me it's about margin.

By the way when we towed with our CRV we also increased the rear tire pressure on the CRV to 39 PSI from a normal 26 psi for stiffer sidewalls.

Maybe there's some weak reasoning but it's what we do.
There's a fifth reason that applies to some of us: If you have excess load capacity (>/= 10%) when inflated to 50 psi it provides a max speed cushion. At one time the Tire & Rim Assn. handbook allowed for an extra 10 mph on a non-speed rated tire. While few of us travel at that high of a speed, the cushion is welcome.

Referencing another post I would mention that lower pressure means a lower tire spring rate which is better for harshness. That being said and since few of us know exactly what our trailers weigh, running at the tire max pressure is directionally safer.
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Old 11-19-2015, 10:09 AM   #24
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There are many opinions on tire pressure , I will continue to follow the recomended pressure stated by the trailer manufacturer , and not fool around with tire size or type .
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Old 02-29-2016, 04:55 PM   #25
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Trailer: Parkliner 2014 V6 Jeep Cherokee
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Tire pressure and temperature | TireBuyer.com
I found the above article on ambient tempature and tire pressure informative. I am preparing for a trip to Texas which will expose my tires to a 50 degree swing in ambient tempature in about 19 hours. Just another thing to be aware of for us snowbirds.
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