carpet friendly?

Competition Off-Season Events
1

Please define a carpet friendly track system.
Does it have to be smooth or can it have extruded (not very sharp) metal comming out for a better grip on the carpet? :confused:

Please resonpond quickly because i would like to begin a complete rebuild of our drive train, and time is of the essence.

2

Since the carpet is setting over the gymnasium floor, no sharp objects can be protruding out if the tracks or wheels.

3