[sperry]

I'd rather have the tires up on the roof rather than swinging around hanging off the ass of the car as well, just from a handling perspective.

Then again, If you're going to drive a Porsche to the track, just run on street tires and make sure you leave yourself enough tire to get home on. If you really want to run R-comps on your Porsche at the track, well you should be able to afford the truck and trailer to do it more safely and comfortably.