The problem is "race tire" in this case, for Max Effort, is more geared towards the autocross side of the class. I had the rules at 100 tread wear originally but some of the experts in autocross told me that doing that was a bit ridiculous. The reason they gave me was street tires have come so far that the time difference between a DOT Street tire with 100 tread wear rating and an actual slick was very minimal. The suggestion from the experts were to cut the street tires off at 140 so the guys with a REAL street tire didn't have to compete against the near-slick-performance of the 100 tread wear tires like the Nitto NT01's and AD08's. I then did a bit of research on it and paid close attention when I was racing at Mid Ohio and definitely agreed and changed it back to the 140 that it was last year.






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