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Open Roads Forum  >  Travel Trailers  >  General Q&A

 > PSI when using higher load range tires.

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TheOMB

Florida

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Posted: 08/30/22 04:56pm Link  |  Quote  |  Print  |  Notify Moderator

My trailer had 4, D load range tires. From advice of many friends I've up graded to E load range. Just got a set of Good Year Endurance with max PSI of 80. Previous tires and trailer sticker says PSI 65.

Should I run 65, 80 or other PSI?

Visually the Load Range E look better at 80 PSI without a slight bulge.

enblethen

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Posted: 08/30/22 04:58pm Link  |  Quote  |  Print  |  Notify Moderator

Download the tire inflation chart for your new tires.
Weigh your rig equipped for the road.
Use tire pressure from inflation chart. I go 5 pounds over for a safety factor.


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mosseater

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Posted: 08/30/22 05:30pm Link  |  Quote  |  Print  |  Notify Moderator

Don't forget, your valve stems may not be rated for 80 psi.


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Lwiddis

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Posted: 08/30/22 05:35pm Link  |  Quote  |  Print  |  Notify Moderator

I want my TT tires at maximum load bearing pressure.


Winnebago 2101DS TT & 2020 Chevy Silverado 1500 LTZ Z71, WindyNation 300 watt solar-Lossigy 200 AH Lithium battery. Prefer boondocking, USFS, COE, BLM, NPS, TVA, state camps. Bicyclist. 14 yr. Army -11B40 then 11A - (MOS 1542 & 1560) IOBC & IOAC grad


BB_TX

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Posted: 08/30/22 05:38pm Link  |  Quote  |  Print  |  Notify Moderator

Many people say run them at max sidewall pressure. But manufacturers post load vs pressure charts for a reason.

time2roll

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Posted: 08/30/22 05:40pm Link  |  Quote  |  Print  |  Notify Moderator

Can be run at lower inflation with reduced load rating or run at max pressure to have max rating.
I would run 75-80 unless there was a handling issue.


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pianotuna

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Posted: 08/30/22 06:01pm Link  |  Quote  |  Print  |  Notify Moderator

Increasing tire pressure with the new tires may not work with the original rims.

I don't know how to find out the rim rating.

I would use the rating on the drivers door.

When I went to oversize tires, I replaced the rims. That allowed me to use the maximum tire rating as the rims were rated at the same psi.

* This post was edited 08/30/22 06:46pm by pianotuna *


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Lwiddis

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Posted: 08/30/22 06:02pm Link  |  Quote  |  Print  |  Notify Moderator

Being one of the many, I disagree with BB. Just like eTrailer disagrees with BB. “I can end this debate for you real fast! Trailer tires, which will have an ST in front of the size, should always be inflated to the maximum psi indicated on the tire.” See https://www.etrailer.com/question-78836.html

A tire retailer advising its customers very clearly.

MFL

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Posted: 08/30/22 06:11pm Link  |  Quote  |  Print  |  Notify Moderator

They are a heavier tire than your previous Ds, so inflating them to less than they are designed for will cause them to run hotter, and not turn as freely as at 80 psi, so no advantage to the upgrade.

I'd try full 80 psi first, then if that seems overly harsh, lower to 75. The charts show the minimum psi required for a given weight, reason why most go above that. Actual TE experts say add 10% minimum to chart minimum, but then say 20% is better, and best of all with ST tires, full sidewall psi, if you did not go way beyond the actual tires needed, such as changing from Ds to Gs.

Jerry





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Posted: 08/30/22 06:41pm Link  |  Quote  |  Print  |  Notify Moderator

Make sure of your wheel’s pressure rating before pumping to 80 psi


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