NASCAR wouldn't confirm which tires were sent for more examination, nor where they were sent. Goodyear is uninvolved in the process. The decision to confiscate the tires for further scrutiny was made independent of the tire supplier and unrelated to durability. Goodyear occasionally keeps tires for further examination (such as with tire failures on the cars of Brad Keselowski and Dale Earnhardt Jr. last October at Kansas Speedway).
It was the second consecutive Sprint Cup race that NASCAR conducted a tire audit. After the March 15 race at Phoenix International Raceway, NASCAR checked the tires used by Joey Logano and Kevin Harvick and found nothing out of the ordinary. NASCAR executive vice president and chief racing development officer Steve O'Donnell told SiriusXM Satellite Radio's NASCAR channel that the audits were "just something we like to do every once in a while." NBC Sports