The ST rules do say something about the modifications to the cars being fully
legal for street use anywhere in the country.  I don't think it would be much
of a stretch to apply this to tires.  I know I got some quizzical looks from
some of my competitors at one event last season when I competed on some very
slick AVSi's.
Try Section 3.3d for all other classes.  Treadwear bars would still be okay,
but there is a limit... even for R-tires.
--
Loren Williams  | Loren@kscable.com
'96 Mazda Miata | Wichita Region SCCA - http://wichitascca.org/
 
 |