GOODYEAR TIRE NOTES
NASCAR Sprint Cup Series -- Race No. 7 – Duck Commander 500
NASCAR Xfinity Series -- Race No. 6 – O'Reilly Auto Parts 300
Texas Motor Speedway (1.5-mile oval) – Fort Worth, Tex.
Fast Facts for April 9-11, 2015
Tire: Goodyear Eagle Speedway Radials
Set limits: Sprint Cup: 5 sets for practice/qualifying and 12 sets for the race;
Xfinity: 8 sets for the event
Tire Codes: Left-side -- D-4392 Right-side -- D-4618
Tire Circumference: Left-side -- 87.40 in. Right-side -- 88.58 in.
(2,220 mm) (2,250 mm)
Minimum Recommended Inflation: Left Front -- 23 psi Right Front -- 53 psi
Left Rear -- 21 psi Right Rear -- 49 psi
Notes: Teams in both the NASCAR Sprint Cup and Xfinity Series will run the same tire set-up at Texas this week . . . this is the same combination of left- and right-side tires that these teams ran twice at Texas last season . . . this left-side tire code (D-4392) has been run by NASCAR teams at Texas since 2011 . . . this right-side tire code (D-4618) was introduced at this track last April . . . this right-side tire employs Goodyear's multi-zone tread technology, which combines two distinct tread compounds on the same tire -- the outside 10 inches of the tread features a compound that is designed for grip, while the inside two inches of the tread is toughened to enhance durability on the part of the tire sees the most heat and takes the most abuse . . . as on all NASCAR ovals greater than one mile in length, teams are required to run inner liners in all four tire positions at Texas . . . air pressure in those inner liners should be 12-25 psi greater than that of the outer tire.