The Sprint Cup Series will use two new tire codes this weekend at Atlanta Motor Speedway with the series running a low-downforce package for the Folds of Honor Quik Trip 500.
Here are the details on the tires that will be used.
Left-side code: D-4680; circumference: 87.48 in. (2,222 mm); minimum recommended inflation: left front — 22 psi; left rear — 20 psi.
Right-side code: D-4682; circumference: 88.39 in. (2,245 mm); minimum recommended inflation: right front — 50 psi; right rear — 47 psi.
Sunday is the first time Sprint Cup teams will run both tire codes. The right-side tire incorporates Goodyear Racing’s multizone tread technology, which made its debut at Atlanta in 2013. The tire features two distinct tread compounds — one for endurance and heat resistance on the inboard 2 inches of the tread and one for traction on the outboard 10 inches.
Compared with what was run at Atlanta last season, the right-side code (D-4682) features the same compound on the inboard, with a different compound for more grip on the outboard. The left-side code (D-4680) features changes to both compound (more grip) and construction to bring in line with what is run at other speedways.
On all NASCAR ovals longer than 1 mile, teams are required to run inner liners in all four tire positions. Air pressure in the inner liners should be 12-25 psi greater than that of the outer tire.
Teams will receive five sets of tires for practice and 13 for Sunday’s race.