All three NASCAR national series will be in action this weekend at Chicagoland Speedway, and all three will use the same Goodyear tire setup.
The Camping World Truck Series will kick things off with 150 laps Friday night while the Xfinity Series will race for 200Saturday afternoon. Sunday, the Sprint Cup Series kicks off the Chase for the Sprint Cup with 267 laps. And these two tire codes will be different than what was run at the 1.5-mile speedway last year.
However, this tire setup has been run at other tracks this year.
CAMPING WORLD TRUCK, XFINITY, AND SPRINT CUP TIRE INFO:
Set limits: Sprint Cup – five sets for practice and qualifying, 10 sets for the race; Xfinity – eight sets for the event; Camping World Truck – five sets for the event
Tire Codes: Left-side — D-4684; Right-side — D-4686
Tire Circumference: Left-side — 87.24 in. (2,216 mm); Right-side — 88.35 in. (2,244 mm)
Minimum Recommended Inflation: Left Front — 19 psi; Left Rear — 19 psi; Right Front — 48 psi; Right Rear — 44 psi
In Sprint Cup and the Camping World Truck Series, this is the same combination of left and right-side tires teams ran at Texas Motor Speedway in April and June, respectively. Sprint Cup teams also ran this left-side tire at Dover International Speedway in May. In Xfinity, teams ran this left-side tire earlier this season at Texas, though this is the first time they have run this right-side tire.
Like last year at Chicagoland, this right-side tire code (D-4686) employs Goodyear’s multi-zone tread technology, which combines two distinct tread compounds on the same tire. The outboard 10 inches of the tread (Traction Zone) features a compound that is designed for grip, while the inboard two inches of the tread (Endurance Zone) is toughened to enhance durability on the part of the tire sees the most heat and takes the most abuse.
Compared to what was run at Chicagoland last season, this right-side tire features a construction change and a compound change on the outboard 10 inches to give the cars more grip. This left-side tire code (D-4684) features an updated construction and mold shape change, as well as a compound change for more grip.
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.