NASCAR teams to use new Michigan tire
June 11, 2014, Staff report, NASCAR.com
Left-side tire combinations in Cup and right-side combinations in Nationwide will remain the same as previously used at the track.
Goodyear, the official tire supplier for NASCAR, adopted the compound used earlier this season at Kansas Speedway in making the change.
The tire was chosen from information gathered during an April test at the 2-mile facility, where the Nationwide Series competes Saturday and the Sprint Cup Series on Sunday. Although the left-side tires are the same as teams used in both race weekends last season, the right-side tire code is being used at Michigan for the first time.
Goodyear is also increasing minimum recommended air pressure in all four tires, raising it two psi in the left front, four psi in the left rear and six psi in both right sides over last year.
The new right-side tire features "just a slight compound change" from what was used last year at Michigan, according to Goodyear. Dale Earnhardt Jr., Clint Bowyer, Greg Biffle, Ryan Newman and Trevor Bayne took part in the April test at Michigan, where drivers were pushing maximum straightaway speeds of over 217 mph, according to unofficial numbers shared by competitors over social media.
Joey Logano set a track record in qualifying last August with a lap of 203.949 mph, the fastest ever at an unrestricted track.