DOVER, DE - MAY 31: Jimmie Johnson, driver of the #48 Lowe’s Pro Services Chevrolet, left, and crew chief Chad Knaus take a selfie with the Miles the Monster trophy in Victory Lane after winning the NASCAR Sprint Cup Series FedEx 400 Benefiting Autism Speaks at Dover International Speedway on May 31, 2015 in Dover, Delaware. (Photo by Sean Gardner/Getty Images)
Getty Images
Chad Knaus, the crew chief for Jimmie Johnson’s No. 48 car, discusses what Johnson’s tenth Dover win means for his career and also explains his decision to let Johnson finish the race on old tires.