Wednesday, May 8, 2013

Goodyear Tire Fast Facts - Darlington

Tire: Goodyear Eagle Speedway Radials

Set limits:
Sprint Cup: 5 sets for practice/qualifying and 11 sets for the race;
Nationwide: 6 sets for the event

Number of Tires:
Sprint Cup: Left-side 1,350, Right-side -- 1,350;
Nationwide: Left-side 475, Right-side -- 475

Tire Codes:
 Left-side -- D-4392; Right-side -- D-4552

Tire Circumference: 
Left-side -- 87.2 in. (2,215 mm); Right-side -- 88.4 in. (2,246 mm)

Technical Inspection Inflation:
Left Front -- 30 psi; Left Rear -- 30 psi;
Right Front -- 55 psi; Right Rear -- 50 psi

Minimum Recommended Inflation:
Left Front -- 22 psi; Left Rear -- 20 psi;
Right Front -- 52 psi; Right Rear -- 48 psi

Teams in both the NASCAR Sprint Cup and Nationwide Series will run the same Goodyear tire codes at Darlington this week. This is the same left side tire code (D-4392) that teams in these two series ran at Darlington the last two seasons. These teams have also run this left side tire at Texas (including earlier this season), Homestead and Chicagoland in the past. This is the first time these teams have run this right side tire code (D-4552) at Darlington, though they did run it at Charlotte last season and will do so again later this month. Compared to what was run at Darlington last year, this right side tire features just a slight construction change to bring it into line with what is run at similar speedways. This tire set-up came out of a Goodyear test with the Gen-6 car at Darlington on February 5. Drivers and teams participating in that test were Carl Edwards in the No. 99 Roush Fenway Ford, Denny Hamlin the No. 11 Joe Gibbs Racing Toyota, Paul Menard in the No. 27 Richard Childress Racing Chevrolet, Juan Pablo Montoya in the No. 42 Earnhardt Ganassi Racing Chevrolet.and Martin Truex Jr. in the No. 56 Michael Waltrip Racing Toyota. 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.

- Goodyear Racing News

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