Tire Pressure for 285/75/R16 BFG KO2's?

Wanted to know how to determine the correct tire pressure for my 285/75/r16 BFG KO2's? 90% highway driving 10% offroading. Its pretty much going to be driven on paved road most of the time because the truck is my daily driver. Need some input on whats a good/recommended psi to use. Been hearing alot of different things from follow the door sticker to set it at 45psi because the max is 60psi... I just want to feel comfortable at the psi im at so my tires last.

 

The max is 60 psi because it's an E rated tire designed to handle loads of heavy duty trucks. At 45 you would still feel every bump and crack in the road.

 

32-35 PSI is what I run.

 

If wear is your main concern the chalk test is a good guide. Put chalk across the tread, drive straight for 100 yards or so then get out and look at what's left of the chalk line. If worn in the middle with chalk still on the outer edges, you are over inflated. If chalk is worn off on the edges yet still visible in the middle, you are under inflated. Equally worn across the tire is perfect. I think 35 psi is a good place to start for those tires.

 

But what would be a good/recommended cold psi to use for mainly on road purposes? Im not to sure how to determine this. Tire shop set them at 45psi and explained to me why...looked it up online just to see what other people are setting theres at and its all different so it made me question it. Asked another shop today about it and they said to always follow the door sticker even with it being a totally bigger tire. And the door says 30psi which seems way too low.

 

I will try this, makes sense. Thanks!

 

Tire wear is my main concern.

 

Registed to this forum to answer.
Been busy with tirepressure calculation since end 2007 when I got hold of the official European formula, and went running with it.
Know nothing about your kind of cars so useless to introduce myself in a seperate topic.

The 60 psi maximum pressure of your tires means probably that they are XL/Reinforced/Extraload tires with maxloadpressure/reference-pressure/AT-pressure of 41 psi in American system ( EUR 42 psi with exeptions). On standard load tires mostly maximum allowed cold pressure given on sidewall is 44 to 51 psi and AT//-pressure is 35 psi ( Eur 36 with exeptions to lower).

So this is what first has to be determined .

But these large tires mayby still are Standard load , because probably already oversised for the car , wich allows a pretty low pressure .

I am able to calculate it for you , but need more data.

From car best seperate wheel load in the loading you normally drive, best done by weighing seperate wheels, second best axle loads, but I think we will have to estimate and use for that , empty weight and the way you load it ( persons and load), GAWR's and GVWR ( Gross Axle/Vehicle Weight Rating).
Second from car is the maximum speed you wont go over for even a minute in your use.

From tires next: Maximum load or loadindex ( found LI 126/123 for your sises).
Kind of tire to determine the AT//-pressure ( standard load, XL//,C-D-E load).
Speedcode or maximum allowed speed of tire.


Greatings from a Dutch Pigheaded Selfdeclared Tirepressure-specialist
Peter

 

It's not. Tire pressure is based on the weight of the vehicle not on the tire itself. The number on the side (60psi) is the MAXIMUM. I run mine at 32 and wear evenly. If you run much higher you will wear out in the center and definitely feel every bump in the road. All that said, an E Rated tire with such a light load as a Tacoma will be less sensitive to wearing funny due to to incorrect tire pressure as a P Rated tire would be on something like an F150 or similar simply due to the stiffness of the sidewalls and tread of the tire itself.

 

I'm in the same situation and started doing some research after 32-33psi felt to low. Just inflated to 38psi and instantly felt a difference. I live in New England where pot holes are everywhere this time of year and i must say it wasn't as bad as i was expecting. Rides smooth and doesn't feel sluggish like before.

 

I've found around 36-38 PSI in my tires is about right. It doesn't seem to matter if they are P rated tires, E rated or anything in between. That seems to help a tad with MPG and is a good compromise for ride and load handling. I tend to get 50,000+ miles out of a set of tires so it doesn't seem to hurt tire life.

 

Take a look. You woke a thread from 2015...........

But I'll repeat the great data early in the thread. If you care about tire wear.

 

Here's how to find the proper pressure based on GVWR: Some prefer to do the "chalk test", which will probably give you the best tread wear.

 

even at 33 washboard gravel roads are hell.

 

Just got new 265/70/17 c rated BFG Ko2's. Discount tire reccomended 38 psi all around cold. Max air pressure is 50psi rated cold. They ride good. I would guess on these light trucks you could run higher psi for hwy and be fine. If the company says you can run 50 psi cold I'm sure they will handle that easily on a TACO

 

2011 DBL Cab w/285/75/17's (E load) I run 25psi on the road.