Tire pressure 295/55r20

And if you give me the data , I am able to calculate it with one of my made spreadsheets. Wont sertanly come to to low pressure and comfort and gripp still acceptable.
If tires are yust enaugh to carry the GAWR, its possible that my calculation comes to higher pressure then given on sidewall, like this "maximum load xxxx lbs AT yyy psi(cold)".
this AT pressure is not the maximum allowed cold pressure of a tire , as they only give on Standard load and XL/reinforced/Extraload-tires.
Most tiremakers allow a cold pressure of 10 psi higher then AT for LT tires.

Will give copy of text I used for other answers , so dont have to write it all over again.

Tirepressure advice is all about load on tire and speed ( and sometimes about alighnment - camber angle).

So if you can give details of car and tires , I can calculate an advice pressure with some reserve for things like, pressure-loss in time, unequall loading R/L, incidental extra load, misreadings of pressure scales,and misyudging of weight, etc.

This is from tires next and can be read from sidewall:
Maximum load or loadindex.
Kind of tire to determine the AT-pressure/pressure needed for the maximum load up to maximum speed of tire, or if lower 160km/99m/h/reference-pressure, wich is not the maximum pressure of tire.
Maximum speed of tire, most given as letter ( Q=160km/99m/h,N=140km/86m/h fi)
If you have offroad or tires looking like that , with large profile blocs that cover a part of sidewall, also mention, they are allowed lesser deflection then a normal road tire, then the tire maker used to determine the maximum load (to my conclusion the case for the Bridgestone tires on Ford Explorer in the Ford/Firestone affaire).
If you cant find all of it give sises of tire and Loadkind, then I will google for it.

From car next and mostly can be found on same plate as the original pressure advices:
GAWR and GVWR ( Gross Axle/Vehicle Weight Rating)
But best would be to determine the real weights in your use on seperate tires or estimate it as acurate as possible, by weighing per wheel(pair) or axle.
Maximum speed , you dont go over for even a minute in your use, eventually different for different situations, for instance when towing or fully loaded.This apart from trafic regulations, if you drive faster then allowed give that speed. Nature punnisches with tire-failure, police only with a penalty.
Give all that and I will calculate and give a picture of one of my filled in spreadsheets in my answer.
If other then original tires, indead as is already answered other advice is needed, a stiffer tire ( fi C-load instead of P-tire) needs a higher pressure for the same load, or the other way around, has lower loadcapacity for the same pressure.

Greatings from a Dutch pigheaded self-declared tire-pressure-specialist.

johntank wrote:

ACRBlaze wrote:
Not sure if this is the correct session, info please move. I'm putting on Toyo MT 295/55r20 and want to see if anyone else is running the same and what tire pressures loaded and unloaded. Pulling an 11k 5th wheel.

For a starting point what size tires are these replacing, what is/was the max load of OE tires in lbs. at max psi., what is load in lbs. of new tires at max psi. if just a few hundred lbs. I would go by the sticker on tow vehicle for loaded/unloaded weight plus 5/10psi. for the larger tire. JMHO

Yeah the size designation he gave is a P tire which isn't a wise choice with a 11000 lb 5th wheel trailer.
However if the Toyo is a MT LT295/55-20 E tire at 35xx lbs capacity then the tire has plenty of capacity.

One problem we get into with installing large over size non OEM tires/wheels that will be carrying heavy loads is finding the best tire pressure for a good foot print and no carcass roll.

Check out this from Toyo website on page #26 for those size tires.
OP needs to weigh his trucks front and rear axles for using tire pressure charts. https://toyotires2-1524598101.netdna-ssl.com/assets/lib:toyo%20content/Application_of_Load_Inflation_Tables_20151020.pdf

I have Toyo HTs and run them around 38 unloaded. When I'm pulling the TT I air them up to a couple pounds under max. I usually leave them there for the trip even if doing a little sight seeing with the truck empty.

ACRBlaze wrote:
Not sure if this is the correct session, info please move. I'm putting on Toyo MT 295/55r20 and want to see if anyone else is running the same and what tire pressures loaded and unloaded. Pulling an 11k 5th wheel.

For a starting point what size tires are these replacing, what is/was the max load of OE tires in lbs. at max psi., what is load in lbs. of new tires at max psi. if just a few hundred lbs. I would go by the sticker on tow vehicle for loaded/unloaded weight plus 5/10psi. for the larger tire. JMHO

ACRBlaze wrote:
Thanks you that is a very helpful.

Is there a way I can figure a rough estimate of what my weight is loaded and unloaded? A formula that will give me the per corner weight handling needed?

Best to weigh so you know each axle weight.

Thanks you that is a very helpful.

Is there a way I can figure a rough estimate of what my weight is loaded and unloaded? A formula that will give me the per corner weight handling needed?

the bear II wrote:
Al my tires on all my vehicles are kept at the maximum pressure shown on the sidewalls. I do this for one reason...I don't have to worry about changing the pressure when unloaded or loaded.

:S

Not the best plan unless, you carry the MAX weight posted on the side wall.

Two reasons!

#1. Most important unless carrying the Max weight you are Over-inflated! This reduces TRACTION, because you have a smaller patch of rubber on the ground.

#2. It will also reduce tire life unless ran at max weight as it will wear more in the center than the edge.

Al my tires on all my vehicles are kept at the maximum pressure shown on the sidewalls. I do this for one reason...I don't have to worry about changing the pressure when unloaded or loaded.