Read in Sportscar that Rabbit racers will be able to run 15" wheels, if adopted by the powers that be. If a 13" wheel with a 60 series tire has approximately the same radius as a 15" with a 50 series donut, what would be the pros/cons of switching to the larger wheel? It looks like the weight issue is a tradeoff, more or less. While I am showing my ignorance, are true coilovers legal beginning in '05? I thought that I read that they would be, however, a gentleman in the IT biz informed me that coilovers will never be approved for use because the "shock of the week" mindset will set in and $1000 a corner shocks will rear their ugly heads.