I have a 1990 dodge ramcharger 5.9L. I have falken 275/r17/55 tires and rims from a newer dodge. I lost the inside door sticker im just wondering what the correct tire psi would be as per spec on the door sticker. I think im at 35 psi right now. Also what rear end ratio might i have thought it was 2.76 but i heard the RC only offered in 3.23?

 

you should read the side of the tire. it will tell you how much air you should put in your tires .

 

It just says Max psi of 50

 

Gear ratio is either 3.23 or 3.55

as for your tire pressure it should have a suggested tire pressure on it...not the max psi. Check the manufacuturers website for your tire model.

 

I run all of our tires so that there is just a slight bulge so that they wear relatively even, and tend to prefer to keep them on the stiff side for better fuel mileage. My truck tires have a max of 42psi, I keep them at 38psi unless pulling an x-heavy load.

 

If the max is 50 id run them between 42-44