PSI rating variables

[surferchicusa]

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?

[lamopar]

If your tires are 15" I highly recommend the GoodYear trailer tire they sell at Discount Tire. They have a speed rating of 87 mph and GoodYear will replace with new if there is a blow out down to 3/16". We had problems with several tires on our triple and after switching no problems at all. Just finished a 6K trip. I replaced the back two as they seem to wear faster than any others at $130 each. I am guessing they went somewhere between 12 and 15K and the front two axles are still fine. Just my recommendation though.

[lincster]

dedmiston wrote:

lincster wrote:
My Warrior has 9500lbs on the axles and 2500lbs pin weight, empty trailer.
So I can see those numbers.
I have put my trailer on the CAT scale numerous times.

Don't worry about placard, go with a good LT tire, not ST junk.
As stated already, don't mix/match tires.

Long time, no see, Linc. Glad to see you still kicking around.

How is your Warrior holding up?

Have you been out to the dunes yet this season? I heard they are seeing record crowds already.

Oh yes, still at it. LOL.

Warrior is holding up well, minor stuff from age, but still in great shape.
Put about 7000 miles a year on it. I have had it since 2004...... 105k miles give or take? So I would say it is holding up extremely well. 🙂
Leaving for the dunes for the first trip in a few days.
I'm sure it will be a busy season.
Everyone seems to be buying toys and campers and getting out of town.

[dedmiston]

lincster wrote:
My Warrior has 9500lbs on the axles and 2500lbs pin weight, empty trailer.
So I can see those numbers.
I have put my trailer on the CAT scale numerous times.

Don't worry about placard, go with a good LT tire, not ST junk.
As stated already, don't mix/match tires.

Long time, no see, Linc. Glad to see you still kicking around.

How is your Warrior holding up?

Have you been out to the dunes yet this season? I heard they are seeing record crowds already.

[lincster]

My Warrior has 9500lbs on the axles and 2500lbs pin weight, empty trailer.
So I can see those numbers.
I have put my trailer on the CAT scale numerous times.

Don't worry about placard, go with a good LT tire, not ST junk.
As stated already, don't mix/match tires.

[Huntindog]

Since this RV is for emergency use, a tire failure could be more than a inconveinient delay on a vacation.

So get those tires replaced pronto.

[Old-Biscuit]

enblethen wrote:
I believe you are correct thinking it is combined axle weight. This shows about 2256 hitch weight.
Sandpiper 38

That is a DRY pin weight based on a DRY trailer weight of 12,823#
Minus the DRY Pin equals 10,567# on axle
DRY weight is more then what OP has posted as 'weight'

If would help if OP would post actual Model Number

Regardless......45# tires mixed with 80# tires

[enblethen]

I believe you are correct thinking it is combined axle weight. This shows about 2256 hitch weight.
Sandpiper 38

[fj12ryder]

time2roll wrote:

joebedford wrote:

Old-Biscuit wrote:
15K triple axle tow hauler only weighing 9300#??

Yeah, I too find that impossible to believe.

Maybe that is 9300 on the axles to talk about tire weight ratings.

That was my thought too.

[time2roll]

joebedford wrote:

Old-Biscuit wrote:
15K triple axle tow hauler only weighing 9300#??

Yeah, I too find that impossible to believe.

Maybe that is 9300 on the axles to talk about tire weight ratings.

[JIMNLIN]

double post..jim

[JIMNLIN]

Having pulled single axle...tandem axle...triaxle....tandem dual axle trailers for a living one thing I found from running different load ranges/sizes and tread patterns is braking issues. This will show up under hard braking events and especially on wet pavement....and flat spots across the tires tread caused from one brake on the end of a axle locking up first.
A trailer axle need the same size/load range/tread patterns on both ends for best results.

Normal speeds and normal braking should be no problem till you can mount proper tires on the trailer.

[joebedford]

Old-Biscuit wrote:
15K triple axle tow hauler only weighing 9300#??

Yeah, I too find that impossible to believe.

[valhalla360]

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.

[CapriRacer]

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!