the race restarted on lap 160. dale earnhardt, jr. made an unscheduled stop on lap 165 for a loose wheel. after the race, he said that he felt "pretty sure we had an issue. we had a lot of wheels shaking, tires shaking because of the wheels spinning inside the tire. every set we had today except for one didn’t shake. every set shook, but it’s a completely different kind of thing when the wheel is not tight. we don’t know which one it was we came in so quick it didn’t beat up the wheel enough to give us a real indication of which one it was. i knew we needed to come down pit road. we had a fast car, just never really had good track position and got behind. we didn’t come here to run second or top five we don’t need that we need a win. we had to try to go out there and win and we just got behind.” the fifth caution of the race flew on lap 170 for a single-car wreck in turn 2. clint bowyer got loose, overcorrected and slammed the wall head-on. describing the incident, he said that he had been "following gordon there and i started to catch him back. i went in and he kind of took my line away and i tried to pull down and as soon as my headlight got out and got some air in it, man it turned me.”