GOODYEAR TIRE NOTES
NASCAR Sprint Cup Series – Race No. 27 – MyAFibRisk.com 400
NASCAR Xfinity Series -- Race No. 26 – Furious 7 300
NASCAR Camping World Truck Series – American Ethanol E15 225
Chicagoland Speedway (1.5-mile oval) – Joliet, Ill.
Fast Facts for September 18-20, 2015
Tire: Goodyear Eagle Speedway Radials
Set limits: Sprint Cup: 5 sets for practice/qualifying, and 10 sets for the race;
Xfinity: 8 sets for the event;
Camping World Truck: 5 sets for the event
Tire Codes: Left-side -- D-4392; Right-side -- D-4618
Tire Circumference: Left-side -- 87.32 in. (2,218 mm); Right-side -- 88.58 in. (2,250 mm)
Minimum Recommended Inflation: Left Front -- 23 psi; Left Rear – 21 psi;
Right Front -- 48 psi; Right Rear -- 44 psi
Notes: Teams in all three NASCAR series will run the same tire set-up this week . . . this left-side tire code (D-4392) has been run by all NASCAR teams at Chicagoland since 2011 . . . this right-side tire code (D-4618) was run at Chicagoland by Sprint Cup teams only last September . . . Xfinity teams switched to this right-side tire at this track earlier this season, while this is the first Chicagoland race with this right-side for Camping World Truck teams . . . this right-side tire employs Goodyear's multi-zone tread technology, which combines two distinct tread compounds on the same tire -- one on the inboard two inches of the tread for endurance and heat resistance, and one on the outboard 10 inches of the tread for traction . . . all these teams ran this same combination of left- and right-side tires at Texas earlier this season . . . they are scheduled to run it again at both Texas and Homestead at the end of the season . . . this tire combination was confirmed for Chicagoland in a tire test at the track on July 13-14 . . . drivers participating in that test were Dale Earnhardt Jr., Sam Hornish, Martin Truex Jr. and J.J. Yeley . . . as on all NASCAR ovals greater than one mile in length, teams are required to run inner liners in all four tire positions at Chicagoland . . . air pressure in those inner liners should be 12-25 psi greater than that of the outer tire.