Good Sam Club Open Roads Forum: Toy Haulers: PSI rating variables
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 > PSI rating variables

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surferchicusa

San Clemente, CA

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Posted: 10/25/20 05:07pm Link  |  Quote  |  Print  |  Notify Moderator

I have 2004 triple axle sandpiper sport toyhauler. Max weight is 15 K but i only load it to 9,300 (weighed it as full as it will ever be).

There are several different brand tires on it, with max PSI ratings from 45 to 80 PSI.

So should i set all the tires to the max rating for the lowest PSI on the sidewall, which would be 45?


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enblethen

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Posted: 10/25/20 05:17pm Link  |  Quote  |  Print  |  Notify Moderator

Are all the tires the same size, ply rating and the same design?
If they are not you should get a new set.
For now take the weakest tire, use it at the bare minimum to get you somewhere to get new set.


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Lwiddis

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Posted: 10/25/20 05:44pm Link  |  Quote  |  Print  |  Notify Moderator

Mixed trailer tires of different max PSIs? Danger, Will Robinson!


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time2roll

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Posted: 10/25/20 07:05pm Link  |  Quote  |  Print  |  Notify Moderator

I would replace any tire not rated 80 psi or different size than the others.


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Old-Biscuit

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Posted: 10/25/20 08:50pm Link  |  Quote  |  Print  |  Notify Moderator

15K triple axle tow hauler only weighing 9300#??

45# ....get rid of those
80# ...fill to max psi


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fj12ryder

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Posted: 10/25/20 08:59pm Link  |  Quote  |  Print  |  Notify Moderator

What sizes are all these tires? Different sizes and different ratings? ST or LT tires?


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surferchicusa

San Clemente, CA

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Posted: 10/25/20 10:48pm Link  |  Quote  |  Print  |  Notify Moderator

I forgot to clarify that this is just for emergency bugging out in the event of a wildfire. I definitely plan on getting 6 new, radial Load Range E rated tires, but just in case i have to bug out (I am in Southern California in the Mojave desert), i was wondering what i should do with the convoluted combo that came with pit when I bought it.

Some of the tires are LT, some are ST. I am one of those people who insist on buying all new including spare) tires to match, but i have just had the toyhauler parked, living in it full time. I am getting it treads to bug out for natural disasters. It was on the road last summer, and i had it weighed with all my belongings and full tanks. It’s rated for 15K, but will never, ever exceed 11,000. It weighs 9,300 lbs full with all my belongings. I want tires though that are rated for the max weight that the trailer is rated for, just to be safe rather than sorry.

time2roll

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Posted: 10/25/20 10:53pm Link  |  Quote  |  Print  |  Notify Moderator

Run all at their individual sidewall max if you must run the existing set.
Set the pressure when cold. Before you roll and before the sun is on them.

CapriRacer

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Posted: 10/26/20 07:03am Link  |  Quote  |  Print  |  Notify Moderator

First, there ought to be a tire placard somewhere on the vehicle. I've heard it is common for that to be near the driver's front corner. What does it say for tire size and pressure? Use that as a first step.

Second, it would be good to weigh the trailer - individual tire weights if possible - if not, at least axle by axle. Then you need to add a factor if you didn't get individual tire weights - 7% if axle by axle, 12% if all axles together. Then compare that to the load carrying capacity of the tires. I am of the opinion that tires should be loaded to more than 85% of their capacity at the pressure used.

You never told us what tire size you have so I am wondering why anyone would think they could give you advice! Mix of LT's and ST's, yes! But are the numbers even the same?

I am going to suggest you prioritize getting all the tires replaced. You're in Southern California, and the sun can really take a toll!


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valhalla360

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Posted: 10/26/20 08:25am Link  |  Quote  |  Print  |  Notify Moderator

1) Order the correct tires now and hopefully get them in and on prior to having to move the trailer.

2) Air them up evenly and plan to travel slowly if you are forced in an emergency to move before the new tires come in. I would stop every 10-20 miles early on to check the tire temps.


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