What is the sweet spot for tire pressure on a 295/70 R18 as a daily.

I am running 39psi for daily city/highway. Is tis too much? benefit of higher psi?

 

I’ve been at 40 but am going to drop to 37 and try that. Seems harsh now. But am pulling off 19.5 mpg with a recent 300 mile trip. That’s pretty good for 295’s on an 4x4 and a lift.

 

40 psi and 19.5 mpg. That's pretty good. I have 39 psi and averaging 15mpg with hills. I might try bumping it up to 40psi.

 

I initially ran 35PSI and it was over 2mpg difference to running 40psi now. With 40 I get close to the stock fuel milage but the ride is a lot rougher on the dirt.

 

I really don’t off road so Ill definitely try 40psi

 

onroad LT 10ply no hauling - 45, Tundras come with P tires if you upgrade to LT and you do the math itll end up somewhere between 45-51 again depending on your vehicle load and trailer load

 

That's true if you are using the same size, I did the math for this tire and its actually 35PSI based on the load charts.If you ran it at 50PSI you could support the whole axle on a single tire.

https://www.tundras.com/threads/lt-tire-pressures.141726/

 

if you offroad air down for more rubber contact, drive with aired down tires lose 2-4mpg, for the LT's run more air in them to keep mpg's better, drive with 35psi for 1k mi and drive with 45-50psi 1k miles see if you see a significant difference

 

This is a great tool for getting air pressure correct when switching from stock tires

 

LT load E.

Back is OK: 45 PSI
Back hurts: 30 PSI
Gravel road: 28 PSI or less
Log road: 25 PSI or less
Deep snow: 14 PSI or less

 

I'd like to hear more opinions for LT tires. I've also upgraded to 295/70/18 LT recently.

My specs so far for LT tires:
Daily Driving (no load)
37 Front, 34 Rear

• might drop my PSI even a tad more, curious to see what other people are running, thinking of even going down to 30 for rear when i'm not carrying a load.
• All i care is maximum contact patch, don't care about longevity of tires. Gotta pay to play is my motto so I want the safest pressures.

Towing?

• I got a 3000lb loaded trailer that I tow periodically (maybe a tongue wait of like 300?), what are the recommendations?
• I don't care about longevity of tires, but rather what is the safest and highest contact patch is what matters to me the most.
• 42 all round?

Hard to do a chalk test right now, it's raining every day where I am and I'm not going to tow my trailer around to find an under cover area in the middle of the night.