The first thing you have to guess with that problem is that your toe-in is off. Don't delay getting that checked and set properly or you're going to ruin those tires in short order. Check the tire pressure too of course, 30-31 psi is about right, no higher than that.
You can EASILY check and set your own toe-in. Done with just minimal care, your toe-in results will be just as accurate as what the latest laser guided whiz-bang alignment rack can produce. Really.
All you need to set your toe-in is a tape measure, wrench, and a big set of pliers or a pipe wrench to turn the tie-rod until the toe-in is where you want it. What you want is for the tires to be 1/16" to 1/8" closer to each other in front than they are in the rear.
Here's how to do it... Basic Jeep Front End Alignment
A more repeatable way of measuring, instead of holding the tape measure between the tires, is as shown below. Those are simply pieces of 1" square aluminum tubing with marks on them equal to your tire diameter.