Do you mean the air assist shocks? Explorers all have spring suspensions originally. Some models also have air assisted shocks absorbers, just to help out a bit. An air suspension like you're referring to is more like something you'd find on a Lincoln, where "balloons" filled with air work like springs. That's nothing like what we have on our Explorers.
I'm running 33x12.5x15s on my 2000 Eddie with a 3" body lift, torsion twist up front and shackles in the rear. (All very affordable by the way). I still have the original air shocks and have had no problem. Once in a blue moon, very rarely, the suspension warning light comes on, but goes off again after restarting the truck. That can be remedied by moving the sensor in the back to a slightly different position to compensate for the amount of lift, no big deal really. Hope this helps you out.