From the USSA Sprint Car Challenge Series Rulebook:
1. A car must compete in the feature and heat races on the same right side tires that it qualifies on. If a right side tire is changed prior to the start of a heat or feature race that car will go to the tail of the original start for all the remaining portions of the event. If a tire is changed during the running of the feature event, the car will restart on the tail of the lead lap, or on the tail of the field if it is not a lead lap car. If more than one car changes tires they will line up for the original start based on their qualifying time. If more than one car changes tires during a red flag, they will line-up at the tail of the lap they were running at the time of the red flag in the order they were running on the last completed green flag lap.

2. In the event a car is required to run a semi-feature, the team may elect to compete with the right side tires the car qualified and ran the heat race on or use another set of USED right side tires. No sticker tires are permitted in the semi-feature. If other used tires are used for the semi, that team must put the qualifying tires back on for the feature event.

USSA also permits Hoosier and American Racer Tires to compete