usually it should be around 32-35 psi but look at the door panel where tire recommendations are and pay attention at number like 94V or 92H or whatever is there corresponds to your tire size and compare it to what you have on tire itself; if the number on the door is less than on tire you ll have to inflate it a little more than 35.... go to continental website and look for pressure specifications for your tire also... my tires are 92 while recommended is 94 and i think last time i checked the pressure it was close to 40 psi! What psi should I be running in my Continental ContisportContact 235/45R17s? (525 manual)