I just put on new Nitto Terra Grapplers 325/60/18 The tire says dont exceed 40 psi but whats the best psi for them to wear evenly

 

I've found 40 psi to work great in most truck tires.

 

all that means is do not exceed 40 psi when seating beads. that tire will run good at 40

 

I was actually wondering the same thing....I have Terra Grappler 305/50R/20's and the tires say do not exceed 60psi....anyone know if these are different from the above 18' wheels?

Thanks!

 

The 2 different sizes are 2 different types of tire. The 325/60/r18 on the Nitto site are listed as LT tires with a max pressure of 65. Sounds like a load range D tire. I would run those at around 44-46. The 305/50r20 do not show as an LT tire. They just show as extra load with a max of 50. Sounds like a beefed up P series tire. I would run those at around 40.

 

Thanks kingfish51, I was thinking about 40lbs myself, and just drove to filem up a while ago....was running about 35lbs. With gas the way it is, every little bit helps!

For what it's worth, the exact tire sizes are 305/50/R20 120S

Appreciate the feedback, and not intention to hijack this thread, just did not want to mess up the forum with a duplicate question with minor differences.

CHIA

 

What ever tire pressure you use, you do have to take a look and make sure you are not getting tire wear in the center or outside edges. Then adjust accordingly. One thing you do have to worry about on an under-inflated tire is heat. It can kill a tire. I had a problem with brakes rubbing at times and causing vibration and heat. After one episode like that, the tire on that corner could not be road forced balanced properly. Fortunately I was near getting a new set anyway, so it wasn't a big deal on having to replace the tries. I would not like that to happen with a new set.