Goodyear Fast Facts — Darlington, Portland
NASCAR Cup Series teams head to Darlington Raceway for the second time this season, and a largely similar Goodyear Racing Eagle tire setup awaits them.
The right side tire is unchanged compared to the one used in April’s Goodyear 400 and the left side tire is very similar, but has a new tire code due to a minor tread compound update. Goodyear does not anticipate any performance changes around the 1.366-mile oval compared to the previous recommendation. This left side tire has been raced at Charlotte Motor Speedway, Michigan International Speedway and Indianapolis Motor Speedway, while the right side tire has been raced six times this year.
“Returning to Darlington this weekend, we have a very similar Goodyear Racing Eagle tire setup to what was run at the Goodyear 400 in April,” said Justin Fantozzi, Goodyear operations manager for global race tires. “The left side tire features a minor tread compound update designed to deliver equal performance and has been successfully run at other races in 2025.”
NASCAR Cup Series
Race: Cook Out Southern 500 (367 laps / 501.32 miles)
Track: Darlington Raceway (1.366-mile oval)
Date/Time: Sunday, August 31, 6 p.m. ET
TV/Radio: USA, MRN, SiriusXM NASCAR Radio
Tire: Goodyear Racing Eagle
Tire Code: D-5284 left side, D-5222 right side
Previous Usage in 2025: Charlotte; Michigan (LS), Indianapolis (LS); Las Vegas (RS), Homestead-Miami (RS),
Darlington (RS), Texas (RS), Kansas (RS), Nashville (RS)
Tire Circumference: 2,263 mm (89.1 in.) left side, 2,277 (89.6 in.) right side
Recommended Minimum Inflation: LF – 20 psi, RF – 48 psi, LR – 22 psi, RR – 44 psi
Total Sets: 14 (12 new race / 1 qualifying transfer to race / 1 practice)