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 > What should the PSI be in the trailer?

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rbp111

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Posted: 02/20/19 07:18am Link  |  Quote  |  Print  |  Notify Moderator

I have a trailer which has Sailun G rated tires. The maximum PSI of air is listed as 110 PSI. I was carrying 90 PSI but recently was told that the maximum PSI, that is 110 PSI is the amount of air I need to carry.
Which is the amount I should have in the tires?

MarkTwain

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Posted: 02/20/19 07:25am Link  |  Quote  |  Print  |  Notify Moderator

rbp111 wrote:

I have a trailer which has Sailun G rated tires. The maximum PSI of air is listed as 110 PSI. I was carrying 90 PSI but recently was told that the maximum PSI, that is 110 PSI is the amount of air I need to carry.
Which is the amount I should have in the tires?


Look on the side of the tire. The max PSI number is on the side. I run the max psi when I am towing and then run 65 non towing.

downtheroad

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Posted: 02/20/19 07:27am Link  |  Quote  |  Print  |  Notify Moderator

For trailers I have always kept it simple.....aired all tires to the max psi as stamped on the sidewall.

Others will tell you to weigh each axle every day, weigh each tire, adjust accordingly....maybe good advice but too complicated for me....max pressure gives full payload and a stiffer sidewall...less heat build up.


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KD4UPL

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Posted: 02/20/19 07:33am Link  |  Quote  |  Print  |  Notify Moderator

You can't really go wrong running the maximum. But, if you weigh the trailer and divide by the number of trailer tires it will give you the approximate weight each tire is carrying. Check the tire manufacturer's load/inflation chart and see about where you need to be for that load. Maybe add a few psi for safety.
I wouldn't worry about checking the trailer "every day" as someone suggested. Just a single weigh is a great idea for any trailer so you know about what your vehicle is working with.

fj12ryder

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Posted: 02/20/19 07:50am Link  |  Quote  |  Print  |  Notify Moderator

I have a triple axle toyhauler with about 2500 lbs. on each tire. I usually run my Sailun "G" rated tires at 90-95 psi. I've run them from 90 psi to the max of 110 psi and find that the smoothest ride is around 95 psi. They are nearing 5 years old and have excellent wear patterns, i.e. none.

My advice is to experiment and see what works best for you. I know one poster on here who runs his "G" rated tires at 85 psi, but that just feels too low for me.


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Posted: 02/20/19 07:50am Link  |  Quote  |  Print  |  Notify Moderator

You don't give your trailer loaded to go weight. In some cases people will be way over tired on their trailers, and would be better to air down a little from max pressure. If you have the proper load range tires for your trailer, I would run the max 110 psi. The weight on each tire can vary, so you would be good on all of them. IMO, it is best to use the proper load range tire, for your trailer, and max pressure. Many trailers come with barely capable load range tires, and in this case, I'd go one load range up, but still run max sidewall psi.

Jerry





Cummins12V98

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Posted: 02/20/19 07:51am Link  |  Quote  |  Print  |  Notify Moderator

rbp111 wrote:

I have a trailer which has Sailun G rated tires. The maximum PSI of air is listed as 110 PSI. I was carrying 90 PSI but recently was told that the maximum PSI, that is 110 PSI is the amount of air I need to carry.
Which is the amount I should have in the tires?


They may be wrong or they may be right. DEPENDS!

What does your RV's axles actually weigh???

Look up your tire size and load range in the Load/Inflation chart for YOUR tire. Now add 5spi to what there chart says. What is YOUR answer???


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Cummins12V98

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Posted: 02/20/19 07:52am Link  |  Quote  |  Print  |  Notify Moderator

MarkTwain wrote:

rbp111 wrote:

I have a trailer which has Sailun G rated tires. The maximum PSI of air is listed as 110 PSI. I was carrying 90 PSI but recently was told that the maximum PSI, that is 110 PSI is the amount of air I need to carry.
Which is the amount I should have in the tires?


Look on the side of the tire. The max PSI number is on the side. I run the max psi when I am towing and then run 65 non towing.


I think he said Trailer.

Cummins12V98

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Posted: 02/20/19 07:54am Link  |  Quote  |  Print  |  Notify Moderator

"Others will tell you to weigh each axle every day"

Please SHOW us where someone has said EVERY day to weigh.

RoyF

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Posted: 02/20/19 07:56am Link  |  Quote  |  Print  |  Notify Moderator

I had one Sailun (G) tire on my fifth wheel for several years; the other three are load range F tires. Trailer weight 12,000 lbs, with 10,200 on the trailer axles. I just used 80 psi in all four tires. The tread wear pattern was about the same for all four tires, so the Sailun did not show signs of under-inflation.

You did not state how much weight your Sailun is carrying.

PS. The load range G tire was overkill for my trailer, but one time when I was on a trip and needed a replacement tire, and the only tire I could find locally was the Sailun.

PPS. After that blowout on a load range E tire, I have used load range F tires (and the Sailun until last summer) and have had absolutely no tire problems.

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