If the option tire works well, it will become the primary tire for the championship race at in November at Phoenix.

What this means is that teams will have six sets of "Primary" or standard tires and two sets of "Option" tires at their disposal during race day at Phoenix. Additionally, teams will be afforded ...

A NASCAR spokesperson said that if the option tire works well during the spring Phoenix race, it would become the primary tire for the championship race at Phoenix in November. There would be no ...