I bash my head off a wall every time I read "it's a cheaper alternative". If you're at a higher competitive level, rubber tires stay strong for a couple runs before falling off and barrel rolling into inconstancy. (if you can take note of the change) In the end, I address them the same. And if you're at a big race blowing stacks on the usual parts, bodies, beer, and strippers, what's the "extra" couple bucks to ya? Love to see some foam conversion come out for modern sedans.. that'd be the day.