Quote:
Originally Posted by raul
There are 4.
Toyo R1R, BFG Rival, Dunlop Z2, Hankook RS3.
The RS3 was used by 90% of the STX field at nationals.
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Toyo R1R no longer legal for next year due to the treadwear rule change. It was only really good in a couple of sizes and even then needed to be shaved for best performance. The Yokohama AD08R and Federal 595 RSR were also used on cars that trophied at Nationals, but both are also not legal for Street and ST classes for next year due to the treadwear ratings.