PSI recommended for Falken Wildpeak AT3 285/65/18 on stock wheels.

I'm running the same tire brand and size but at 48psi. It rides very smooth.

 

I called Falken today to get the tire pressure that I should be running in a 275/70/18. They asked what the OEM tire were, etc. Falken calculated I should be running the following psi for normal day to day driving:

Front: 47 psi
Rear: 50 psi

Tire should be filled after vehicle has been sitting for at least 3 hours.

Do those numbers seem high to anyone?

 

Not really. My door sticker for 285/55/20 D rated KO2s shows 46 PSI.

 

Bump to see if we can get direct Falken feedback on the LT295/70R18 load range E (129/126). I just mounted these up.
Looking at the Falken charts, it appears that the pressure in these should be way lower than what is being thrown around for the 275's. For the 295's, the data I see on the Falken site shows 35psi for 2295lb and 2520lb for 40psi.

I started off at 45psi on a quick drive yesterday, and it is certainly not unbearable, but stiffer than the P tires I replaced. The chart shows 2735lb at 45PSI, which would be well over the Tundra's max capacity per the door jam, etc.

 

@Falken QA
I am curious about my tire pressures as well. Both under normal driving and Towing.

2019 Tundra TRD sport Crewmax
Stock tire (I think): 275/55/20
Current tire: LT 295/60/20, load range e, aftermarket fuel rims

What is a good normal driving pressure?

I also have a trip coming up where I'm going to need to pull just under 9,500 lb at a tongue weight of 950. I have a weight distribution hitch and blue Sumo Springs. What do you recommend setting front and rear pressures at for that weight?

 

Here's a interesting document from toyo, and from what I gathered in my own research on the topic, all the manufacturers use this standard ETRTO table, as the Falken rep already brought up.

https://www.toyotires.ca/sites/default/files/application_of_load_inflation_tables_20170203.pdf

Using the information in that document, I made a little cheat sheet to help out. The stock Michelin ltx that came on my pro were P275-65-18. Because they're p-rated on a light truck, you need to reduce the load rating of the tire by 10%. This give you Toyota specified weight per tire.

From there, I referenced the load tables for my particular new tire, which is an LT275-70-18 E and found the closest match. The table doesn't break it down by single psi increase, but you can do the math and it checks out(+40l bs per psi in my case). I run my tires at 38 front, 42 rear.