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Goodyear Fast Facts - Darlington

GOODYEAR TIRE NOTES

NASCAR Sprint Cup Series -- Race No. 25 – Bojangles' Southern 500

Darlington Raceway (1.366-mile oval) – Darlington, S.C.

Fast Facts for September 4-6, 2015

 

Tire: Goodyear Eagle Speedway Radials

 

Set limits: Sprint Cup: 7 sets for practice/qualifying, and 12 sets for the race

 

Tire Codes: Left-side -- D-4650; Right-side -- D-4646

 

Tire Circumference: Left-side -- 87.56 in. (2,224 mm); Right-side -- 88.43 in. (2,246 mm)

 

Minimum Recommended Inflation: Left Front -- 22 psi; Left Rear – 20 psi;

     Right Front -- 52 psi; Right Rear -- 48 psi

 

Notes: Teams in the NASCAR Sprint Cup and Xfinity Series will run completely different tire set-ups at Darlington this weekend . . . in Sprint Cup, this set-up features the left-side tire code (D-4650) run at Indianapolis and the right-side tire code (D-4646) run at Kentucky earlier this summer . . . compared to what was run at Darlington last year – and in response to NASCAR’s lower downforce package – this left-side features construction and mold shape changes, while this right-side features a compound change for more grip . . .  this tire set-up came out of a Goodyear test at Darlington on June 30, after the new rules package was announced . . . drivers participating in that test were Matt Kenseth, Brad Keselowski and Tony Stewart . . . as on all NASCAR ovals greater than one mile in length, teams are required to run inner liners in all four tire positions at Darlington . . . air pressure in those inner liners should be 12-25 psi greater than that of the outer tire.

 

Throwback Tires: In keeping with NASCAR’s throwback efforts and the return of the Southern 500 to its traditional spot on the schedule on Labor Day weekend, the tires run at this weekend’s Darlington races will feature different sidewall markings . . . replacing the yellow Goodyear lettering that became standard in 1992 is a white, stencil-look design that harkens back to the mid-1970s.

 

 

 

 

GOODYEAR TIRE NOTES

 

NASCAR Xfinity Series -- Race No. 24 – VFW Sport Clips Help A Hero 200

Darlington Raceway (1.366-mile oval) – Darlington, S.C.

Fast Facts for September 4-5, 2015

 

Tire: Goodyear Eagle Speedway Radials

 

Set limits: Xfinity: 6 sets for the event

 

Tire Codes: Left-side -- D-4392; Right-side -- D-4640

 

Tire Circumference: Left-side -- 87.32 in. (2,218 mm); Right-side -- 88.39 in. (2,245 mm)

 

Minimum Recommended Inflation: Left Front -- 22 psi; Left Rear – 20 psi;

     Right Front -- 52 psi; Right Rear -- 48 psi

 

Notes: Teams in the NASCAR Xfinity and Sprint Cup Series will run completely different tire set-ups at Darlington this weekend . . . in Xfinity, this left-side tire code (D-4392) has been run at this track since 2011 . . . this is the first time these teams have run this right-side tire code (D-4640) at Darlington, though they did run it earlier this season at Charlotte . . . this right-side is one of Goodyear’s multi-zone tread tires, which combines two distinct tread compounds on the same tire -- the inboard two inches being slightly tougher to withstand more heat and wear on the part of the tire that sees the most abuse, while the outboard 10 inches is designed to give the cars more grip . . . this tire set-up came out of a Goodyear test at Darlington on June 9-10 with Sprint Cup drivers Greg Biffle, Clint Bowyer, Jamie McMurray and Ryan Newman . . . as on all NASCAR ovals greater than one mile in length, teams are required to run inner liners in all four tire positions at Darlington . . . air pressure in those inner liners should be 12-25 psi greater than that of the outer tire.

 

Throwback Tires: In keeping with NASCAR’s throwback efforts and the return of the Darlington event to its traditional spot on the schedule on Labor Day weekend, these tires will feature different sidewall markings . . . replacing the yellow Goodyear lettering that became standard in 1992 is a white, stencil-look design that harkens back to the mid-1970s.