Air pressure in 10 ply tires

hey guys I was just curious i just got new tires on today and I was wondering what air pressure I should run in them? I went from a 245/75R16 to 265/75R16 but the new ones are also 10 ply. Didn't really want 10 ply due to the weight but I got a good deal on them and just wondering what would be best air pressure I should run for a thicker heavier tire like that. I currently have 32psi like the door has but it seems like there's a lot of resistance while driving...

 

37

 

Varies based on season, roads, etc. but I usually shoot for about 34 front / 32 rear in hopes of having something close to a smooth ride

 

I run 40 and they heat up to about 42 43 when driving. I've only had them a couple weeks and am experimenting with it. Since they are new, I'm seeing how the the "nipples" or "whiskers" are wearing. I also did a chalk test and at 40ish, they may be a little too high in the center of the tire. I've got 235 85 16 toyo at3 and I can feel a big difference from stock as far as feeling the extra weight.

Edit: mine look low at 37lbs. They bow out at the bottom and dont look right. Maybe that's just part of a high sidewall.

 

3d gen Tacomas have a inflated load weight of 2,149 lbs-2,172 lbs from P and euro metric tires.

Examples:
265/70/16/112 @ 30 psi = 2,149 lbs(Offroad)
P265/65/17/110 @ 29 psi = 2,149 lbs(Sport)
P245/75/16/109 @ 32 psi = 2,172 lbs(SR)

The vehicle manufacturer de-rates euro-metric and P-metric tires for use on trucks and SUVs.
If you switch to LT tires, the new inflated load weight is 2,149/1.1=1,954 lbs.
Use the LT load charts to find the PSI that attains this weight for your particular size.

TOYO PDF
https://www.google.com/url?sa=t&sou...Vaw0zaHumL9xB01d0CRYFLPCS&cshid=1562890063059

NITTO PDF
https://www.nittotire.com/media/152964/TechBulletin_NTSD-12-011.pdf


https://www.tiresafety.com/en_us/choosing-tires/sizes-and-classifications/light-trucks-and-suvs


https://www.tirerack.com/tires/tiretech/techpage.jsp?techid=195


https://www.moderntiredealer.com/article/311494/lt-or-p-metric-tires-for-light-trucksuv-applications


https://www.tirereview.com/tire-types-and-load-capacity/


https://www.tirereview.com/the-importance-of-load-ratings-the-unsung-hero-of-vehicle-safety/

 

only way to know for sure and for your setup is a chalk test. fwiw, I run 38 on highway

 

This. Listen to this. He helped me come up with this same answer, mine have been perfect at this pressure.

 

Chalk test it. With my sliders, skids, truck box and bumper, I run 36 in the front and 32 in the rear, for a perfect chalk test. 265/70/17

 

My 235 85 16 E would look damn near flat at 32. Maybe my eyes are fooling my old ass.

Guess I better go back down to 37 since it heats up to 40 on highway.

 

42 here but I'm pretty heavy

 

Im really glad you posted this. This is how to find the proper PSI needed. The "chalk test" can lead to some dangerously under-inflated tires.

 

I agree...
The 'math' puts you at 43 psi.
43 psi in a LT235/85/16/120 is 1,966 lbs.

 

So I should be at 43?

 

Damn math! I cant do it lol.

 

I have 265/65/17 e load ko2s and run 30. I tried 35 but it was way to rough for my liking.

I get advertised mpgs and the truck got plenty of power at 30 psi.

Just because you got 10 ply tire, IMO doesnt mean you need to run higher pressure unless you added weight. Just my .02, good luck!

 

And they dont look super low?

 

Yep...
2,149 lbs x 4 tires give you 8,596 lbs.
Curb weight is 4,000-4,500 lbs; GVWR is 5,600 lbs. Let's just suppose average cruising weight is 5,000 lbs...
This gives a 1.7 dynamic load coefficient.

Chalk test is fine if you're just going back and forth in a flat parking lot.

 

The 'math' puts you at 41 psi; LTs probably aren't for you.

 

Thats 30 psi. Thats what toyota recommends, why would it look low? 10 ply is designed to carry more weight, so thats why you could put more air in them, other than that just run what toyota recommends.

 

I run 35 psi cold on 265/75R16 E load, on a OR DCSB with about 50 lbs of gear in the bed, they run around 38-39 warm.