So here's a cut and paste from the autox section regarding Showroom Class:
Showroom
This class is stock. The car MUST be as available from the factory. This will allow for wheel changes, but they must be in a size available as an option on the car. The intention for this class is that aftermarket factory style parts can be replaced. So you can use non-adjustable shocks, any brake pads, rotors (no slotted or cross-drilled, just any manufacturer), any type of street tire (not R-Compounds), or minor appearance items such as different bumpers due to crash repairs. CG-Lock seat belt restraints will be allowed.
I have two specific questions:
When it says, "This will allow for wheel changes, but they must be in a size available as an option on the car. ", would this allow the use of any size tire on a stock wheel size?
When it says, "...any type of street tire (not R-Compounds)," what is the definition of R-Compounds? If the tire is street legal, like RA1s, would those be considered street tires and therefore legal in Showroom? Or is there some treadwear rating where street legal tires are considered R-comps and therefore not considered a "street tire" for the purposes of the classing definition?
Thanks!
Alex
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