Tire Pressure BFG E Load 265/70/17

@Fojo, this is the best way to go about calculating your new tire pressure. If you'd rather skip the math and somewhat-confusing instructions, there's an automated version available here: Writeup on my experience using the calculator about halfway through my post here:
https://www.tacomaworld.com/threads/a-non-enthusiasts-tacoma-build.667560/page-4#post-24428925

 

I run 35 psi yr round with my K02's load range C. They have 55k on them & are in great shape. Basically stock truck.

 

What ardrummer292 said,

 

Strongly suggest the chalk test. 35psi would be a good place to start.

 

With empty bed, 33 front, 28 rear. Loaded with family and moderate amount of tent camping gear 35/35, or loaded bed and towing 35/40. That's what I do.

 

I run 36 in mine and they seem to be wearing very well. Have about 20k on them so far.

 

I have a very similar setup to yours. 2015 Offroad doublecab with a shell. Generally not hauling or towing anything 99% of the time right now. BFG KO2's in 265/75/16 because I bought it used that way and not by choice. Dealer I bought it from had aired up to 80psi making it damn near undriveable.

Did a chalk test and decided not to go below the suggested 35psi for E load range tires. Chalk is still not perfect at 35 but better than higher pressures. Above 40psi it rides like a dump truck. I've owned many vehicles, I've worked on many vehicles, and these tires ride like ass on our Tacos when you put higher PSI in them with no load. I'm 100% going with different tires when these ones wear out (or sooner when my wallet has surplus funds where I can afford 17" wheels and tires).

So what's the perfect one-size-fits-all answer? Let me save you the pain - there is no perfect answer. TireSize PSI calculator is a good reference. These tires might be stiff enough to have sort of a "run flat" effect on our lightweight trucks but I'm not trusting my life to it driving on the highway. 35psi is my low end limit.

Do people run below 35psi? Yes.
Are those same people all dead now? No.
Am I going to run below 35psi? No, not for now.
Should you run below 35psi? That's your choice.

 

I went from 30 to 50 to try it out. (no load). My mileage improved from 16 to 19. Same daily commute. I'll probably go to 35 or 40 and test again, and settle there. I like the soft ride at 30, but the mileage sucks.

 

I noticed a difference from 35 to 32 lol!