Set limits: Cup: 3 sets for practice, 1 set for qualifying and 7 sets for the race; Xfinity: 6 sets for the event
Tire Codes: Left-side — D-4798; Right-side — D-4796
Tire Circumference: Left-side — 2,227 mm (87.68 in.); Right-side — 2,251 mm (88.62 in.)
Minimum Recommended Inflation: Left Front — 22 psi; Left Rear – 22 psi; Right Front — 54 psi; Right Rear — 50 psi
Storyline – 2019 rules package likely to make MIS a hit: Recent Monster Energy NASCAR Cup races at Charlotte Motor Speedway and Kansas Speedway – where passes for the lead and passing in general were up – have the NASCAR world excited about what we might see at Michigan International Speedway this weekend. With this current Cup rules package, corner speeds will be up at Michigan and tight racing throughout the field should be the order of the day. The track is still relatively smooth since it was resurfaced in 2012 so Goodyear’s tire set-up at Michigan is now aligned with what is run at another recent repave in Texas Motor Speedway.
"With Michigan being a relatively recent repave, combined with the 2019 Cup rules package and drivers expected to be on the throttle all the way through the corners, we always have to be cognizant of tire heat," said Greg Stucker, Goodyear’s director of racing. "We combat that with the tread compounds we bring to tracks with smooth surfaces, as well as the gage or thickness of that tread that allows the tire to dissipate heat. Overall, this weekend could be a good show for the fans if it is anything like some other recent events where corner speeds have been up and there has been a lot of tight racing and passing."
Notes – NASCAR teams on Texas tire set-up at Michigan: Teams in both the NASCAR Cup and Xfinity Series will run the same tire set-up at Michigan this weekend . . . this is the same combination of left- and right-side tires that these teams ran at Texas in March . . . Cup and Xfinity teams ran this same right-side tire code at Michigan in 2018 . . . this is a different left-side than what was run on this track last year, featuring a construction change to align with other speedways . . . air pressure in those inner liners should be 12-25 psi greater than that of the outer tire.