While teams in all three NASCAR series in action at Chicagoland this week will run the same left-side tire code, Sprint Cup teams will run their own right-side tire code . . . Sprint Cup teams have run this left-side code (D-4392) at Chicagoland since 2011 . . . they have also run this left-side at Texas and Darlington earlier this season . . . this is the first time they have run this right-side code (D-4618) at Chicagoland, though they did run it earlier this season at Texas . . . 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 . . . this tire combination was confirmed at a Goodyear test at Chicagoland on June 10 . . . teams and drivers participating in that test were #11 Joe Gibbs Racing Toyota with Denny Hamlin, #22 Penske Racing Ford with Joey Logano, #27 Richard Childress Racing Chevy with Paul Menard and #48 Hendrick Motorsports Chevy with Jimmie Johnson . . . 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.(Goodyear), see full tire notes, tire codes, pressures, set limits on the Chicago Race Info page – Goodyear section.
