I've owned a few sets of offroad tires (2x Mickey Thompsons, 2x Pro Comps).

They normally have a max load rating PSI, but they don't have a max PSI like most tires have.

The max load rating PSI seems to be around 20. (22 on one of my old ones, but 20 on my current pro comp AT).

How high can you actually raise the PSI for on-road driving? When I bought the car, one tire was 36 PSI, and the others were around 25. I dropped them all to 20. If I can safely drive at a higher PSI however, I will do so.

(I asked this same question on my vibrations question, but since it was so far off topic I thought I'd create a second post)

 

OK, I accidently lied. The new trick (Pro Comps) are 35 PSI, and I have them loaded accordingly. The old MTs were devinately 20 PSI. I have a photo of of the load rating from when I sold them.

Same question though- 35 where its at or can I push that?

 

Yes, you can put more, but it will only result in poor tire wear and higher risk of blow out if you strke something (curb, rock, etc...).

 

Had to be a BIAS tire. Radial tires have to clearly display both maximum load rating & maximum cold tire pressure in order to be sold in the United States by federal law.
I know my old Mickey Thompson MTXs on my 2nd Gen were "D" Load Range tires which were clearly labeled Max 50 PSI.

 

How are the tires wearing....I would run them at 35

 

If you are running the tires that are recommended for that car, the PSI rating is displayed on the side of your door. I've never heard of a car running less than 28 PSI, let alone 20, on regular roads.

 

I think our Dodges are supposed to be 30-35psi.

 

It mostly depends on the tire though, and then valve stem. I just got yokohama and I had them put in the High pressure stems they said I can pump up to a 75PSI very max when im maxing out my truck.