I have 22x10-10 ATV tires the max operating pressure is 7psi I currently have them at 4 PSI now I'm not sure if that's too low or too high ??

 

It depends on your preference and the type of riding you do. I keep my rear tires at 4 1/5 psi and 4 in the front. I like the softer ride but still stiff enough the side walls don't fold when taking a fast corner on a trail.

 

generally speaking, the harder you ride, the more pressure you need. Racers use bead locks on rims to keep tires on, but if you ride easy then lower pressure makes foe a softer ride. I wouldnt drop below 4 psi

 

I usually run 5 psi myself. 4 psi is fine but I wouldn't go any lower.