Air pressure in 10 ply tires

I’m with you. I tried the chalk test (running 10 ply ST MAXX). I couldn’t tell the difference between 30psi and 50psi. So I just settled on running about 40psi just cause it felt good.

 

My man

 

C vs E has little to do with it.
A C has a max psi of 50; E has a max of 80 psi.
A C and E, of the same size and pressure, will have the same load capacity, up to 50 psi.

What size?

 

265/75/16

 

This cold. Heats up to 40 to 42 depending on the time of year. Has produced the best wear for me, but on 255s.

 

37, same as OP.

1,954 lbs falls between 35(1,910) and 40(2,100) psi.
5 psi=190 lbs
1 psi=38 lbs
35 psi(1,910 lbs) + 2 psi(76 lbs) = 37 psi(1,986 lbs)

 

NASA called. They want you to come back to work from the quarantine.

 

LOL.
I'm just a dumb electrician.

 

Not hardly my friend.

 

I just can't believe I've spent so much time today worrying about how much air is in my dumb tires lol.

 

Tomorrow is Friday, you should start a thread asking what oil is the best for the 6cyl.

 

Thats with a yard of gravel @30 psi. Tires look pretty good, so i never gave it a second thought. Will look into this chart later on tonight.

 

Thanks for the info, your explanation makes sense. I've always had luck running around 36 front and 32 rear, cold pressure in my 10 ply tires and I've gotten 40K miles out of each set of mudders, over the last 30 years or so of driving Yotas. So what do you run your 10 ply tires at?

 

Or what intermittent level is best for the wipers in light rain lol

 

My old Maxxis Buckshots off my 2nd gen, a little over 40K miles, ran at 35 front and 32 rear. Also, take into consideration how much weight everyone is carrying as well.

 

What oil is the best for the 6cyl?? Thats weak... For best results, must start a thread on the oil change intervals. Good times

 

I’m pretty new to having E Load tires.. but couldn’t pass up a killer deal on them, so I opted for them on the new Toyo AT3s.. plus I beat the shit outta them goin off-roadin twice a month.. keep them at 31psi.. heat up at 34psi

 

Thanks for posting this. I went through the articles and calculations but have a few questions. This is not specific to the conversion calculation method, but influences the results. Feel free to say you don't know if that is the case.

I live in the high mountain desert. The normal tire pressure gauges, from what I can tell, are calibrated to sea level. I get a 5lb difference on the normal pressure gauges compared to the TPMS on the LT235/85/R16 tires and 6lb difference on my OEM P265/70/R16 tire. That makes sense as the density of air is less here at 7700 ft. I just add this in. My question has to do with the wide temperature swings in the desert. I expect the temperature to be at least 40 degrees warmer between morning and mid day. Is "cold start" temp meant for the morning before the sun hits the tires and starts to warm up the tires or before you start rolling (at any time during the day)? I've thus far thought it meant before sunrise but that may be taking it too literally and therefore too much additional pressure (as the pressure increases with ambient temp and sun). I do adjust for season, but we sort of have multiple seasons each day. Thoughts?

Thanks again for helping make this more understandable. I appreciate it.

 

No...you got it right regarding 'cold'.

If you make daily commutes to sea level and the ambient temperature are the same in each location, add 4 psi; assuming you live at 7,700 and will be setting your cold temp there.
If ambient temps are higher at sea level, which is generally the case, it will offset changes in elevation; no need to add additional psi.
Say every 1,000 ft is a 3.5 degree ambient temp difference. 7,700 ft would be a 27 degree ambient difference; equal to about 3 psi. This offsets the 4 psi difference due to elevation between sea level and 7,700.