Dura trac e range. What ballpark psi should I try?

I have a set of 265 75 16 dura tracs on some trd rims. My question what pressure are you guys running on 10 ply tires in your gen 3’s.

 

2019 4 door base 4x4

 

https://www.tacomaworld.com/forums/wheels-tires.15/

 

I always start at the same PSI as stock P rated tires. You may want to experiment and try going a few PSI up or down to figure out what works best for you. But there is no need to go much over 35-40 PSI even when loaded heavy in a Tacoma. Those tires are designed for trucks that are 2000 lbs heavier empty than a Tacoma weighs when it is loaded to the max.

 

I run 38-40 PSI on my E-Rated Nitto Terra Grapplers

 

I have the Dura Tracs on the TRD rims. Sort of what was said above I tried 30, 35, and 40 psi and settled on 35. I don't off road and on road the tires give a good ride. At 40 they were a bit hard, at least for me. 30 was ok, but I figured I'd get a touch better gas mileage at 35 and since I don't live in a snow state or off road, 35 would wear better in my mind.

I haven't done that chalk test to see how the tire is making contact with the road, but the feel test with me at least made me like 35.

 

My Duratracs are C load, and found them too stiff @ 35psi fo my liking. With an E tire already being stiffer, I couldn't see myself going much higher. I prefer the cushy ride the Off Road Taco gives you.

I do 30-32ish, depending on the season.

 

I use this to calculate tire pressure:

 

34-35 PSI minimum.

 

LT tires need more PSI to support same weight as a P rated tire.

Stock calls for 29-30 psi, if running E or C load, then 34-35 PSi minimum.

 

I run 32psi on e rated KO2s

 

I do about 38-39PSI for my E's.

 

No clue what his door jamb says so I just guessed 30 psi stock. This is what the calculator says:

 

Run 36lbs+34lbs F/R on Toyo RT E.

 

I’ve not found a good explanation, but e load tires generally require a slightly higher air pressure to carry the same load. My only guess is that it is because e load tires heat up more due to greater rolling resistance and raising the air pressure reduces the rolling resistance. Raising the air pressure definitely increases fuel economy. The draw back is that it makes the tires ride harsher.

The difference could also be a difference in the testing/standardization process for LT tires vs P tires. An analogy to the difference between the nato 5.56 and Remington 223 comes to mind.

I experimented with mine and settled on 35-37 psi in my 255/85r16 dick cepak extreme terrains. I got 1-2 mpg better at that pressure compared to 30-32. They ride harsh but I’ve gotten used to it. I haven’t noticed any uneven wear after 10k miles.

 

Your adjusted recommended psi for those tires is 37 psi.

 

P and euro metric tires get a psi that attains a 2,149 lb load capability.
LTs get a psi that attains a 1,954 lb load capability.
PSI is just a means to an end; the end being load capability. PSI by itself, without context, means very little.

Here's the table for the Offroad tire; a euro metric 265/70/16/112 @ the recommended 30 psi, has a load of 2,149 lbs.


Euro and P metric tires are de-rated by a factor of 1.1 for use on trucks and SUVs. When switching to LTs, there is no reason to de-rate. So we get 2,149÷1.1=1,954

These are the load tables for a LT255/85/16, LT265/70/16 and LT265/75/16...
LT255/85/16 @ 36 psi is 1,958 lbs
LT265/70/16 @ 39 psi is 1,964 lbs
LT265/75/16 @ 37 psi is 1,986 lbs