New Sailuns installed, load chart ?

[Ranchertx]

4400/110 x 2500/x= 62.5 lbs

You could easily run 70-75 and save the wear and tear on the suspension

 

[Hoopy Frood]

I have a question. On your tow vehicle do you inflate your tires to the max that is printed on the sidewall? Why not? My tow vehicle tire sidewall says 50 psi max, BUT the truck manufacture says 32 psi. I would think the it is wise to follow the manufactures guidelines. I know to load my tow vehicle where it would need 50 psi would be well beyond what the vehicle is designed for.

I personally will follow the manufactures chart.

I guess it depends on which chart you want to follow. I follow the tire manufacturers chart.

 

[Hoopy Frood]

Made you a cold pressure/ axleload- and tandemload-capacity- list, with build in maximum reserve, at wich nothing trembles loose.
For that I lowered the maxload by 4 steps, to give tire a deflection, needed for max speed 81 mph , instead of the 65 mph for wich the ST give maxload.

Then in front of cold psi, for axleload, and behind for the total tandem, then assumed adding 15% to the acurate determined by weighing tandemload.
For axleload using 90% of acalculated axleload capacity.

So build in maximum reserve, and still nothing trembling loose.

From your story, I make , you estimated the loads, and that is dangerous.

Assumed you have a traveltrailer with tandemaxle, but correct me if wrong, if 5thwh, I have to make a new list.
3154lbs/ 50,0 psi/6091lbs
3299lbs/ 52,5 psi/6370lbs
3443lbs/ 55,0 psi/6649lbs
3587lbs/ 57,5 psi/6927lbs
3730lbs/ 60,0 psi/7204lbs
3874lbs/ 62,5 psi/7481lbs
4017lbs/ 65,0 psi/7757lbs
4159lbs/ 67,5 psi/8032lbs
4302lbs/ 70,0 psi/8307lbs
4444lbs/ 72,5 psi/8582lbs
4586lbs/ 75,0 psi/8856lbs
4728lbs/ 77,5 psi/9130lbs
4869lbs/ 80,0 psi/9403lbs
5010lbs/ 82,5 psi/9676lbs
5151lbs/ 85,0 psi/9948lbs
5292lbs/ 87,5 psi/10220lbs
5433lbs/ 90,0 psi/10492lbs
5573lbs/ 92,5 psi/10763lbs
5714lbs/ 95,0 psi/11034lbs
5854lbs/ 97,5 psi/11305lbs
5994lbs/ 100,0 psi/11575lbs
6133lbs/ 102,5 psi/11845lbs
6273lbs/ 105,0 psi/12114lbs
6412lbs/ 107,5 psi/12383lbs
6552lbs/110,0psi/12652lbs/referencepressure G-load

6691lbs/ 112,5 psi/12921lbs
6829lbs/ 115,0 psi/13189lbs
6968lbs/ 117,5 psi/13457lbs
7107lbs/ 120,0 psi/13725lbs

I have no idea what that list of numbers even means. Makes no sense to me.

 

[triplethreat]

The 85 refers to tire size, 85 has taller sidewalls than the 80/

I know that.

 

[triplethreat]

I have a question. On your tow vehicle do you inflate your tires to the max that is printed on the sidewall? Why not? My tow vehicle tire sidewall says 50 psi max, BUT the truck manufacture says 32 psi. I would think the it is wise to follow the manufactures guidelines. I know to load my tow vehicle where it would need 50 psi would be well beyond what the vehicle is designed for.

I personally will follow the manufactures chart.

As you know, when a tire manufacturer makes a tire of a certain size, it could end up on any number of different brands, models of cars or truck, so the inflation number on the side of the tire tells you the load capacity of that tire when it is inflated to whatever pressure that they list on the tire. With car and truck manufacturers, they buy the tires from the tire manufacturer and then the vehicle manufacturer determines what is a safe inflation number for that tire based on the vehicle it is going on and the weight of that vehicle. Trailer manufacturers also buy their tires from a tire manufacturer and those tires also could go on different brands and models of trailers. The tire manufacturer has stamped the load capacity rating on the tire based on the maximum inflation number for that tire. The difference is, trailer manufacturers DO NOT test the tire applications and then make suggestions for the tire inflation psi based on the weight of the trailer. In fact, they make no suggestions at all other than to say (on the Federally mandated safety sticker which includes tire size, rim size, and inflation numbers) to run the tire at the same pressure as what the manufacturer say for maximum load capacity ratings. And that is the difference between how a car/truck manufacturer does it, and how a trailer manufacturer does it. They both fulfill their legal obligation by giving you a cold inflation number for the vehicle that the tire is going on, but the trailer manufacturer simply does not test/engineer/determine what is a suitable inflation number for the trailer.......they just make sure that they put tires on the trailer that are sturdy enough for the weight that the axles will carry (plus 10%) and call it a day

And as a side note on tire inflation number on a car or truck.....the inflation numbers that are recommended by the vehicle manufacturer, if followed by you, the customer, will provide enough tire load capacity for that vehicle up to the GVWR of that vehicle. So if your door sticker on the truck says 65psi, like mine does on the rear tires of my Dually, and the front tires are supposed to be at 75 psi (tire max inflation is 80 psi on the sidewalls of both the front and rear tires), those inflation psi numbers in my tires are enough for the tires to provide enough load capacity for my truck to be 14,000 lbs....which is the GVWR of the truck.

 

[jadatis]

I have no idea what that list of numbers even means. Makes no sense to me.

Its a same kind of list the tiremakers give.
but for axle and tandem, and build in reserve, so you dont need to do pre or aftercalculations yourselves.

Edited that post to make list more readable, by placing spaces and gave more explanation.

Only need to know the loads 99% acurate, the most tricky part, and your responcibility.

 

[Jerry P]

New sailuns installed now have pressure questions
I have seen the load charts by Sailun for the 235/80/16. 14 ply tire
It looks like I could run less pressure based on the weight of my 303rls. Maybe 80psi ?
I scaled about 10,000 on the axles connected to the truck,give or take depending on the trip we are taking. These tires carry a max of 110 psi at max load which is way more than I carry so,
1. should I air up at less than max psi ?
2.And what would the minimum psi be ?
Tire guy says 110 psi……
I notice that some answers are all over the place, thanks

I have the exact same camper as you & same Sailun tires. I run 110 psi (tire dealer also recommended )@cold. I've had no issues with them in over a year. When we get to our destination I can tell no difference of "shake up" inside the camper than when I was running 80 psi "E" tires.