Twenty-eight NASCAR Sprint Cup Series teams and two NASCAR Camping World Truck Series teams participated in a day-long tire confirmation at Michigan International Speedway on Monday.
Michigan International Speedway became NASCAR’s fastest race track in June. Marcos Ambrose's speed of 203.241 mph for the Quicken Loans 400 was the 11th-fastest pole-winning speed in Cup series history and the first time the pole winning speed was faster than 200 mph at a track other than Talladega Superspeedway and Daytona International Speedway.
But NASCAR driver Greg Biffle thought the speeds, though slower, would lend themselves to exciting racing at NASCAR’s fastest racetrack.
“Since the speed is down just a tiny bit I think you will see that groove continue to widen out. I have even floored it down lower on the race track and the car has some turn in it down there. I think we are going to see some good racing,” Biffle said. “We were all fearful that this tire would be really low on grip and the car would be hard to drive and it would chatter out from under us. That is certainly not the case.”
Michigan son Brad Keselowski agreed.
“Michigan is a lot different track with the repave, and we saw that here with the spring race. So we’re all still just trying to get a grip on that, literally, and trying to figure it out,” he said. “So Goodyear has us here to kind of reconfirm some things that we saw and hopefully improve the racing another notch here at Michigan International Speedway. So we’re just trying to help out here as we can and also make our cars better at the same time. So it’s a good process for all.”