[Rob]

You need to figure out if you are damaging the carpet or leaving any residue behind. If your marks just come from changing the angle of the fibers in the carpet so they reflect light differently (kind of like you see with the rolled grass patterns on baseball fields) then you are probably fine.

If you are leaving a trail of burned rubber and molten carpet in your path you should consider changing something.

Check for tears or fibers in the carpet that are pulled out. Also be sure you are not leaving peices of your wheels behind. Those are the kinds of things that will make your inspection difficult.

Good luck!

Rob