wooHoo! I just changed my tires from Toyo Open Country ATs to MTs. So far I love these tires! Not much louder on the Highway than my old ATs at all!

However the tire guy(20+ years experience) says those tires are rated for 80pounds for a certain weight. He then pulls out his calculator and calculates the weight of my vehicle and says I need to run the tires at 45psi

I thought I read somewhere here that they should run around 30psi? What the heck gives

 

that does seem a little high, but it depends on the size of the tire and the weight of the vehicle. i think the best way is to do the "chalk test".

 

It has to do with maintaining the load rating and heat dissipation of the OE tires. I run my 35's at 40 PSI. You wont do any damage at a lower pressure and you will get a better ride. I would run them between 30 and 35 on the road.

 

26.5 to 29 psi in mine, and since the full control arms, rides great, handles terrific.
The rear control arms really made a heck of a difference, medium speed corners are phenomenal, the back end is planted.
Tire wear measured with a guage is exceptionally even on all 4 tires, but I did have a lot of running on mine at 26lbs, as the higher pressures made it too flighty untill I added the lower front arms for a caster of 7.1 degrees.

 

Guy rotating my swampers set em @ 40psi, feel alot better down around 30psi. Drive w/ em and adjust to your feel while keeping an eye on wear pattern, is my reccomendation.

 

I just got the same tire 2 weeks ago and was told 35 psi so far so good also that will shut the low pressure system off and the annoying tone will be gone.....

 

Looks good.

I've had my old JK come back from the tire shop with 60 psi!!! I just don't get it.

 

You can check out this table and do your own calcs if so inclined...

At 35 PSI those tires can handle 4400 lbs per axle - this far exceeds the JKs 2650 lb/axle GVWR.

TOYO TABLE

 

Do the "chalk test". 28 psi 4 mine (and 'cause of the thick sidewalls they're still rather stiff). Wouldn't trade 'em for anything. Great in the rocks!

 

man 40 psi would feel like riding on bricks. I run my KMII's at about 28. Seem to do fine.