What PSI should I have my tires at?

32 to 35 PSI

Here is an article was written for you guys to understand the whole process. It depends on your tire size.
Click here: how to properly Inflate your tires http://thegrabbable.com/how-to-use-a-portable-air-compressor-to-fill-a-tire

This Google Vlog contains the professional answers to your question about PSI: http://viair88.blogspot.com/

Start with the manufactuers inflation rate posted on the door. If you still have that size tire on vehicle, this is the proper inflation rate. If the size ot the tire has changed, the significant number is the difference between the front inflation rate and the rear inflation rate ( n/a if the numbers are equal). This number accounts for the specifics of your vehicle ( engine & transmission type, suspention , weight distribution, etc.). The dirfference between front & rear inflation rate should be maintained regardless of tire size or type. This will ensure proper braking and handling charecteristics and a safe ride.

There should be a sticker on the driver's door that gives the proper inflation for you vehicle. If not there it can be on the pillar where the door meets the vehicle.