After finally completing the rain-delayed Duck Commander 500 at Texas Motor Speedway on Monday, NASCAR Sprint Cup Series teams headed to Michigan International Speedway in Brooklyn, Mich., for two days of Goodyear tire testing on Tuesday and Wednesday.
Speeds weren’t official during the test, but several reports had Greg Biffle at speeds of near 220 mph on the first day of testing. Clint Bowyer claimed to get up to 217 mph during the morning session on Wednesday. Dale Earnhardt Jr. said he got up to somewhere between 212 to 215 mph on the straightaways and 180 mph in turns.
“That’s white-of-your-eyes-fast,” Bowyer said.
There have been tire issues the past several weeks on older track surfaces. It’s a problem that Goodyear has blamed on teams beginning runs on tire pressures lower than recommended. Michigan has one of the newer surfaces on the circuit, as the track was repaved in 2012.
This weekend, the Sprint Cup Series goes night racing at Darlington (S.C.) Speedway on Saturday. Teams will return to MIS for competition on June 15 and then again a couple months later on Aug. 17.
“I enjoy racing here,” Earnhardt said. It’s a fun track. The asphalt is really aging well and it’s just going to keep getting better and better over the next couple of years.”