It new wheels and tires on my truck and I changed to the nitto trail grapplers.
They are a 10 ply 80psi max tire. I am currently running 50 psi on all
Four corners.

What pressure should I be running on the street? Wandering if I should
Go a bit higher?

 

I have Michelin LTX II E rated 10 ply pumped to 65psi (max of 80 allowed) I run on city and Interstate and get with my 5.0-20.8 mpg at 68mph. Rides like a pickup, corners like a Porsche. As soon as I put the LTX's on, I got 1-2 mpg better mileage. I've read here on other posts that an E-rated tire at under 50 psi will wear in 25-35,000 miles. Thats not acceptable!

 

I run my 10 ply Duratracs at 50 psi. Been thinking of going to 60 psi for maybe slightly better mileage.

 

google how to use chalk to find best tire pressure. There are several vids online.

 

So believe it or not nitto told me to run 42 psi in those tires. Seems lo to me

 

Amazingly enough nitto told me to run 42 psi in those tires. That seems a bit low to me I think I'll stick with the 50 or check out the chalk thing

 

Even funnier Nitto told me to run 45psi. Stock rims.

 

I'm running aftermarket xd rims

 

the truck will get better mileage because with more pressure because only the center of the tire is touching. you'll wear your tires out pretty quick in the middle with too much psi.

i would do 50 as a maximum unless you are towing. i'm running 50 in front and 45 in the rear on a set of 275 65 r20 duratracs. it rides very nicely.

 

The manufacturer uses a calculation based on what your oem tire rating was compared to new. If they're saying 42, run 42. The calculation is to provide ideal wear and match your load characteristics from your OEM.I just went through this with BFG over the phone because I was getting too many different stories. The trade off to running higher pressures is that it will ride like a dump truck, but will wear evenly and live longer. I used to run mine too low until I was prompted to check it out.