All three of NASCAR’s national series will use new tire combinations this weekend at Dover International Speedway.
Compared to what was run at Dover last season, the tire setup features construction updates on both sides of the car. Cup and Xfinity teams will have a compound change on the left-side tire designed to match up better with the higher downforce package in Cup.
The right-side tire must withstand the loads generated and at the same time have a tread compound that will rubber-in the track surface. With the new higher downforce settings and 750 horsepower engine package in the Cup Series, corner speeds will be up at Dover, thus putting more demand on the tires.
Dover is unique among NASCAR ovals one mile or less in length, in that inner liners are required on all four tire positions. Air pressure in those inner liners should be 12-25 psi greater than that of the outer tire.
Here’s the tire info for this weekend.
Set limits: Cup: Three sets for practice, one set for qualifying and nine sets for the race; Xfinity: Six sets for the event; Trucks: Six sets for the event
Tire Codes: Left-side — D-4868; Right-side — D-4872
Tire Circumference: Left-side — 2,227 mm (87.68 in.); Right-side — 2,250 mm (88.58 in.)
Minimum Recommended Inflation: Left Front – 19 psi; Left Rear – 19 psi; Right Front – 49 psi; Right Rear – 45 psi
Goodyear also announced that the tire test scheduled for this week at Chicagoland Speedway has been postponed to May 7-8 due to inclement weather.