Just wondering what you guys with mud grapplers or those who had them are running your air pressure at? (I mean when they are running on the roads everday use not offroading). Looking to see if they can last longer at a certain psi.

 

good way to find out are chalk test's.
i found my tires with nitto terra grapplers run well with 55 - 58 psi

 

Never came across my mind to do that. Good idea thanks alot!

 

could you explain a chalk test please

 

You chalk the tire and check the ground to look at the contact with the pavement. You ideally want an even contact across the whole tread.

 

I thought you were always supposed to use the numbers on the inside of the drivers door

 

You know AF, I had always heard that too. But one of my good hunting buddies has owned a tire shop (now he has two) for over 20 years and he inherited from his dad and he says no.

That it's only the case IF you use the tire size on the door AND it's within that tire's specs. He has always told me rule of thumb is 80% of the tires MAX cold tire rating for everyday, on-road usage.

I've been doing that for years and get very good wear out of my tire. My Cepeks are about to hit the 30K mark and they still have a good 90% tread on them. The Mickey Thompson MTXs on my second gen Ram had 68k on them when I traded the truck and still had decent usable tread...

 

30k and 90%? Thats amazing.

When I had my wrangler, I had to run 28 PSI in my BFG AT's, to keep them flat footed for everyday driving.