Twenty-six NTT INDYCAR SERIES cars will roll through Indianapolis Motor Speedway on Friday and Saturday for the GMR Grand Prix, with 35 entries scheduled to begin practice next week for the Indianapolis 500 presented by Gainbridge. This is Firestone’s 22nd consecutive year supplying all of INDYCAR’s racing tires. “This certainly has been quite challenging because in (recent years) we’ve had our big oval races after the Month of May,” said Firestone’s Cara Adams, Director, Race Tire Engineering and Manufacturing. As it has for more than a decade, Firestone provides two tire compounds for INDYCAR road races, the primary “black” tire and the softer alternate “red” tire. Only one Firestone compound is utilized for INDYCAR oval races, and with a few exceptions each “500” entry will receive 34 sets for the month, part of the 28,000 racing tires Firestone will manufacture for the 2021 season.

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