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Old 01-20-2019, 04:43 PM
KMS KMS is offline
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Trailer tire pressure???

I've got a trailer tire pressure question for all of you. This actually isn't on my boat trailer, it's on my travel trailer. I just put 4 brand new Goodyear Endurance 225/75/15s on it. They are load range E with a max PSI rating of 80. I have never believed that one should inflate their tires to the max air pressure listed on the side of the tire. I have always inflated the tire based on the load I am carrying.

I have weighed my trailer fully loaded. I have roughly 7000lbs on the axles. Divided by four tires that's 1750lbs per tire. According to Goodyear's inflation chart, to carry that much weight, I should inflate my tires to 35 PSI. That seems absolutely insane to me and I would never think of running a trailer tire that low. This is listed right on Goodyear's website. I checked a couple of other trailer tire manufacturers websites and they all say the same thing.

What do you guys think?

Thanks
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Old 01-20-2019, 04:57 PM
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lakedrum03 lakedrum03 is online now
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10% less than max pressure. Any tire, anywhere, any time.
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Last edited by lakedrum03; 01-20-2019 at 06:23 PM. Reason: Grammar
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Old 01-20-2019, 05:30 PM
mattison mattison is offline
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My neighbor experienced severe swaying with his new to him travel trailer when inflated near max pressure. he was told by his dealer that he should be at 35 psi and has not had the problem since
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Old 01-21-2019, 09:30 AM
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lashburn1 lashburn1 is offline
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With "Trailer Tires" you should be inflating to the cold Max specs.
On load Range E that will be 80psi.
I live in SoCal too and did quite a bit of Desert trailer trips
The proper tire pressure at all times is the max pressure listed on the side of any trailer tires. Trailer tires are rated for weight capacity and designed to function based on that maximum tire pressure. The tires should be inflated cold, meaning that they should be at max listed psi (in your case 80psi) prior to traveling. The road friction heats up the tires and gives an incorrect reading of max pressure when inflated part way through a trip.

Check your trailer on a scale to get full loaded weight.
Make sure your trailer require E range. But at 7000 loaded that could be the case as Laod D might be maxed.
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Last edited by lashburn1; 01-21-2019 at 11:56 AM.
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Old 01-21-2019, 09:33 AM
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lashburn1 lashburn1 is offline
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Quote:
Originally Posted by mattison View Post
My neighbor experienced severe swaying with his new to him travel trailer when inflated near max pressure. he was told by his dealer that he should be at 35 psi and has not had the problem since
He has another problem, proper tire pressure alone would not "cause" this issue
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Old 01-21-2019, 09:59 AM
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lakedrum03 lakedrum03 is online now
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Quote:
Originally Posted by lashburn1 View Post
He has another problem, proper tire pressure alone would not "cause" this issue
Agreed. Sounds like something is out of line and the squishy tires are taking out the push/pull of the misaligned item.
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Old 01-21-2019, 10:26 AM
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JohnE JohnE is online now
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What Larry said. With the infamous GY Marathons, I'd inflate to 10 psi over, (75 psi, iirc) based on the speeds I'd go. (Over 65 mph) This was in accordance to the bulletin Goodyear put out with those instructions.
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Old 01-21-2019, 12:32 PM
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CUSTOM WHEEL & TIRE PACKAGES


CUSTOM DECALS - EMAIL FOR MORE INFO

$125 LED TRAILER LIGHT PACKAGE - FREE SHIPPING
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Last edited by thatsmrmastercraft; 01-22-2019 at 11:06 PM.
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  #9  
Old 01-21-2019, 04:25 PM
roadster02 roadster02 is offline
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Get rid of the expensive, lousy, trailer tires and use LT tires. You will not have any more blowouts or problems, unless you leave the trailer out in the weather, tires exposed to the sun, and unmoved with the tires on the ground for several years. That's my experience with boat trailers, travel trailers, and utility trailers.
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Old 01-21-2019, 05:06 PM
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I never had any problems with the marathons. One former mc employee told me the problems with blowouts were from the stress of the torsion springs when backing up. Not sure if that is true. All other things being equal, I think I prefer her not to have the marathons fortunately I don't anymore
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