Tire rules for 201, Smoky Mtn., Duck River
022814 TireRules

For the 201, Smoky Mountain and Duck River swings, competing teams will be restricted to using Hoosier 1300, 1350, 1450, 1600 and 55-compound tires or American Racer 44-, 48-, 53- and 56-compound rubber. All of the tires will be required to punch a minimum ’40’ reading when checked with a durometer. For 201 Speedway only, the Hoosier 1425 compound will be allowed in addition to the above mentioned Hoosier compounds.