Originally Posted by DesertRat

On the subject of tires with a little out-of-round wiggle to them, they will typically warp their plastic material a little over the course of a run and run true. If it is making the car jump then you may have more of a problem, but I would run them in a practice and see if they come off true.

When it comes to cutting tires, just be sure to watch the rim, not the foam, and make sure it spins super true before cutting. I don't own a Hudy arbor, but if I can tell that the rim is spinning out-of-round on the truer I adjust it. It takes me a long time to true tires.