MARTINSVILLE, VIRGINIA - APRIL 09: Austin Cindric, driver of the #2 Menards/Moen Ford, pits during the NASCAR Cup Series Blue-Emu Maximum Pain Relief 400 at Martinsville Speedway on April 09, 2022 in Martinsville, Virginia. (Photo by Jared C. Tilton/Getty Images) | Getty Images
Goodyear Fast Facts: Martinsville
APRIL 11, 2023 AT 3:33 PM
NASCAR Cup Series β Race No. 9 β 400 laps / 210.4 miles
Martinsville Speedway (0.526-mile oval) β Martinsville, Va.
Fast Facts for April 15-16, 2023
Tire: Goodyear Eagle 18-inch Short Track Radials
Set limits: Cup: 1 set for practice, 1 set for qualifying and 8 sets for the race (7 race sets plus 1 set transferred from qualifying)
Tire Codes: Left-side β D-5176; Right-side β D-5178
Tire Circumference: Left-side β 2,249 mm (88.54 in.); Right-side β 2,278 mm (89.69 in.)
Minimum Recommended Inflation: Left Front β 10 psi; Left Rear β 12 psi; Right Front β 22 psi; Right Rear β 22 psi
Storyline β Goodyear comes up with a concrete solution for Martinsville: Martinsville Speedway places high physical demands on tires, with a tight turning radius and very little banking, leading to hard braking into the corners and hard acceleration off. Goodyearβs designs its tire constructions to handle such conditions, with a tire combination that is unique to the half-mile track. The other factor is the concrete corners and laying rubber on that surface. Goodyear tested at Martinsville last June and made a compound change for the fall race, designed to help lay rubber on the concrete in all weather conditions. Ambient temperatures are expected to be in the 70s this weekend, which is very mild for Southern Virginia. Rubbering in the track creates multiple lanes, leading to more side-by-side racing and passing throughout the field.
βThe times of the year that we race at Martinsville often finds us in cooler temperatures,β said Greg Stucker, Goodyearβs director of racing. βCooler ambient and track temperatures make it more difficult to put rubber down on the concrete corners, so we have worked very hard over the years to design our tread compounds to accomplish that. We tested Martinsville after the first race there last year and modified our tread compounds, taking another step toward making this tire set-up more weatherproof.β
Notes β Cup teams on fall β22 tire set-up at Martinsville: Being on a 18-inch bead diameter tire, NASCAR Cup teams will run a different tire set-up than those in the Xfinity and Truck Series at Martinsville this week . . . this is the same combination of left- and right-side tires that Cup teams ran at this track last October . . . Martinsville is the only track at which either of these two tire codes will be run . . . with this 18-inch tire, and its lower profile sidewall, NASCAR Cup cars will not run inner liners in any of their tires in 2023.
Wet Weather Tires β Goodyear bringing wet weather tires to Martinsville: Goodyear will bring its 18-inch wet weather radial tires to Martinsville for the NASCAR Cup cars, should NASCAR determine that conditions warrant . . . Goodyear tested its 18-inch bead diameter wet weather tire at Martinsville in June 2022, in order to determine the feasibility of running in wet conditions on ovals . . . Kyle Busch, Austin Cindric and Tyler Reddick participated in that Martinsville test . . . NASCAR Cup teams last ran a wet weather tire in competition at Watkins Glen last August . . . in addition to the obvious difference of a tread pattern versus Goodyearβs dry weather βslickβ tires, the βGoodyearβ and βEagleβ lettering on the sidewalls of the wet weather tires is white, not the standard yellow.