What tire pressure do all of you run? All my buddies fill up to the max pressure listed on the sidewall. I did this (45 psi) with a toyota pickup on a set of bfg all terrains and wore out the center of the tread. When I traded it in on my F-150 I have been keeping them at 35psi. It is time for new tires, and I want to do it right.
Is there any advantage to running max pressure? Is there any danger of building up too much pressure as the tires heat up?
Thanks!!

 

I have 31"s and I have 33-36ish psi. I believe the 235/75/15 are similar. Over inflation will result in wearing the middles out, loss of traction, higher potential for explosion when things are run over, decreased agility, increased noise, less contact with the road.

I autocross cars alot and the only reason someone MIGHT over fill tires like that is if they are getting severe rollover onto the sidewalls due to having crappy too tall tires. If their tires are rolling over that means they are beyond the limits of the suspension and/or tires.

I don't know what the official number is but its a good idea to keep an eye on the situation. Check them frequently. Alot of well aligned trucks do wear the middles out because their owners don't like to see the buldge in the sidewall while the truck is at rest, so they crank up the psi a tad.

 

The sidewall pressure is the max pressure the tire can handle safely. Usually you only want that much pressure if you are always operating the tire near its maximum load carrying capacity. Everyone pretty much goes with 32-35psi in there tires. The manufacturers recommended tire pressure for best tire wear, handling, fuel economy, etc is usually printed on your trucks certification label, thats the white sticker in your door jamb that tells you paint codes, axle codes, etc. Somewhere on that sticker it should list the recommended pressures for the different tire sizes your truck was available with. If your running a different size tire just stick with about 35lbs.

-Jon

 

take a mark on the face of the tire a solid line all the way across the tire. drive in a strait line to te end of the block, parking lot or what have you, until the line shows a wear patern, u can use chalk or a marking crayon for your mark. if just the center wears the tires have to much pressure. this seems to be a good way of checking the tire pressure versus the load in your bed to

 

thanks