Tires can NEVER be the reason for DW. NEEEEEVEEEEERRRRRRR. In no way. Not a chance. Will never ever be the reason. Banish the thought.
The ONLY causes for DW can ONLY come from improper or worn/broken/bent suspension setups. The only way. No other way. No chance in hell that it's anything else.
A properly set up suspension, be it stock or modified, will not have DW no matter what tires are on it. Bring those same tires of death and mount them on my TRAIL RIG and I promise you'll never get so much as a death shimmy.
An imbalanced tire can set off a case of DW just like a bump in the road or road debris, but Jeep never designed DW into the equation when making the XJ. To say that tires caused the problem is to say that the suspension is designed improperly from the factory.
The wrong geometry comes from worn parts, broken or bent parts, and stupid-asses that lift thier Jeeps.
You can have the tires balanced or replaced, but you're only masking the problem that's still there until it's fixed.
Forget the tires being the problem.
Did I mention that the tires aren't the problem?