Letter for Discussion 9.3.45. TIRES
#31852 from Club Racing Board · Rule change · TB 22-01 (2022-01 Fastrack)
In GCR, Section 9.3.45., change as follows:
"Tires shall be 124 (“U”) mph rated or better unless otherwise specified or controlled. In the Improved Touring, Super Touring,
American Sedan, Spec Miata, B-Spec and Touring categories, any U rated, or better, DOT approved tire is required. Re-grooving
of DOT tires by any method once the tire has left the manufacturer is not permitted. Grooving or re-grooving of non-DOT tires is
permitted. Recapped tires are not allowed in any class. Tire size is unrestricted unless otherwise stated in class specific rules. The
only modifications allowed to DOT tires are having treads “shaved” or “trued.”"