Goodyear Fast Facts — Michigan
NASCAR Cup Series — Race No. 15 – 200 laps / 400 miles
Michigan International Speedway (2.0-mile oval) – Brooklyn, Mich.
Fast Facts for June 7-8, 2025
Tire: Goodyear Eagle 18-inch Speedway Radials
Set limits: Cup: 1 set for practice, 1 set for qualifying and 7 sets for the race
(6 race sets plus 1 set transferred from qualifying)
Tire Codes: Left-side — D-5284; Right-side — D-5218
Tire Circumference: Left-side — 2,263 mm (89.09 in.); Right-side — 2,277 mm (89.65 in.)
Minimum Recommended Inflation: Left Front — 22 psi; Left Rear – 24 psi;
Right Front — 50 psi; Right Rear — 46 psi
Notes – Cup teams now on Charlotte left-side tire at Michigan: Being on 18-inch bead diameter tires, NASCAR Cup teams will run a different tire set-up than those in the Craftsman Truck Series at Michigan this week . . . this is the same right-side tire code that Cup teams ran at Michigan in 2024, as well as at Daytona and Talladega earlier this season . . . this left-side tire debuted at Charlotte two weeks ago . . . compared to what Cup teams ran at Michigan last season, this left-side features a compound change for more tire wear and lap-time fall-off . . . with this 18-inch tire, and its lower profile sidewall, NASCAR Cup cars do not run inner liners in any of their tires.
Goodyear quote – Stu Grant, Goodyear general manager of global race tires: “Michigan is extremely fast with a track surface that is pretty smooth. That relative smoothness will allow teams to potentially work in some pit strategy with two-tire stops, depending on the stint. For the fans, another great aspect of Michigan is that it has multiple racing grooves, enabling drivers to run different lines to affect their set-up and make passes.”