Race 8: Sonsio Grand Prix at Road America

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Sonsio Grand Prix Race Track

TIRE TRACKER: Sonsio Grand Prix at Road America

Sonsio Grand Prix Tires

Firestone is supplying more than 1,600 race tires for the Sonsio Grand Prix at Road America. Each entry receives the following allocation of Firestone Firehawk race tires:

  • Primary (black sidewall): 7 sets per entry*
  • Alternate (red sidewall): 4 sets per entry
  • Rain (gray sidewall): 5 sets per entry

*Does not include rookie set


“There’s a lot of excitement heading into the Sonsio Grand Prix at Road America as it is historically the fastest road course race in the series. This high-speed race is accompanied by an elevation change of about 211 feet per lap which totals a climb of 11,600 feet in the 55-lap race. To help tackle the elevation change on the 4-mile-long natural terrain road course, we modified our standard road course tires to have slightly less tread gauge to assist with load changes that generate more temperature through the turns. The primary and alternate tires for the 2022 Road America event will feature the same tires and compounds supplied for the 2021 Road America race.”

- Cory Williams, Principal Program Engineer, Bridgestone Americas Motorsports

Sonsio Grand Prix Car


The right rear tire on an Indy car can support up to 2,600 pounds of lateral loading on certain tracks, equal to the weight of a compact car.


Sonsio Grand Prix Standings


Contact: Rachel Potee
Email: poteerachel@bfusa.com
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