using donuts are the cheap man's skinnies... yes I've seen many people do it at the tracks and they have put at least 20 or so passes on em. It really depends on Tech In if you get a place that's strict you won't be able to use the spare tires but if you get a lax tech in then they will let you do it. The tires are rated at 55mph for a sustaned amount of time you can take them over that speed limit. If it was up to me I wouldn't do it, I'd be afraid the tire would blow at the end of the track and you'd end up smashing into the wall