| All Street Class vehicles must use DOT street tires with a UTQG tread wear rating of 140 or higher, Tires with UTQG tread wear rating under 140 are not permitted in Street Class. All Modified Class vehicles are permitted to use DOT Approved tires with UTQG tread wear ratings of 50 and above. Tires with less than a UTQG rating of 50 are not permitted in Modified Class. Use of DOT Legal tires with UTQG tread wear rating of less than 50 permitted for Unlimited Class.
"If everything seems under control, you're just not going fast enough." Mario Andretti
San Antonio Z Club
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