TIRE CODES
Tire: Goodyear Eagle Speedway Radials
Set limits:
Cup: 5 sets for practice, 1 set for qualifying and 8 sets for the race
Xfinity: 6 sets for the event
Tire Codes:
Left-side -- D-4744 Right-side -- D-4710
Tire Circumference:
Left-side -- 87.68 in. (2,227 mm) Right-side -- 88.23 in. (2,241 mm)
Minimum Recommended Inflation:
Left Front -- 18 psi Left Rear - 18 psi
Right Front -- 42 psi Right Rear -- 38 psi
Storyline - New Year, New Rules, New Tire Set-up for The Brickyard: Indianapolis Motor Speedway always provides one of the biggest challenges to tires on the NASCAR circuit. The combination of high speeds, long straightaways, minimal banking and the diamond-grooved surface all wreak havoc with tires on these 3,400-lb stock cars with their lateral loads. Visiting Indianapolis in April has become a regular stop on the Goodyear testing schedule, and that held true for this year. Although the track hasn't change from last year's visit to The Brickyard, the car has. Staying on top of those changes and how they affect racing at Indianapolis remains a high priority for Goodyear.
"As NASCAR has moved to its lower downforce setup over the past several years, we have been adding some grip through the tires," said Greg Stucker, Goodyear's director of racing. "We actually tested this 2017 tire set-up at our Indianapolis test leading into the 2016 Brickyard race, but the consensus from the veteran drivers we had there was that this left-side was a big step and that our existing Indy left-side was the better fit for last year's rules package. Since NASCAR reduced downforce again with the 2017 package, we brought that same left-side to this year's test and it proved to be a good fit. As everyone knows, Indy is tough on tires. This combination will rubber-in the race track and provide plenty of grip to help cars get ahold of the track."
Notes: Teams in both the NASCAR Cup and Xfinity Series will run the same tire codes at Indianapolis Motor Speedway this week . . . teams will run the same right-side tire code (D-4710) they ran at Indianapolis last season, but with a new left-side code (D-4744) . . . compared to what was run at this track last year, this left-side tire features a construction change, and a compound change to give the cars more grip . . . this tire set-up came out of a Goodyear test at IMS on April 25-26 . . . drivers participating in that test were Denny Hamlin, Jimmie Johnson, Brad Keselowski and David Ragan . . . as on all NASCAR ovals greater than one mile in length, teams will run inner liners in all four tire positions at Indianapolis . . . air pressure in those inner liners should be 12-25 psi greater than that of the outer tire.
Upcoming Tire Test: Goodyear will hold a tire test at Dover International Speedway next Tuesday (July 25). Teams scheduled to participate in that test are the #20 Joe Gibbs Racing Toyota (Matt Kenseth), #22 Penske Racing Ford (Joey Logano), #34 Front Row Motorsports Ford (Landon Cassill) and #88 Hendrick Motorsports Chevrolet (Dale Earnhardt Jr.).