So i ordered a new set of super swampers LTB's on my 91 xj. 33x13.50x15 and had them installed at my dealership i work at. A mechanic got them balanced and put on so i left that night but the next day they just felt like the wheels where going to fly off. Checked the nuts and they are tight. Called 4wp's and they said that they are OFF ROAD ONLY TIRES and they cannot be balanced because they change every time they heat up. I have never heard of this, can someone enlighten me?