Firestone are bringing more than 1,500 tires for this weekend’s 2025 NTT INDYCAR SERIES season-opening Firestone Grand Prix of St Petersburg presented by RP Funding.
Each entry will receive:
- Five sets of the Black Primary tire with rookies receiving one extra set.
- Five sets of the Green Alternate tire
- Five sets of the Gray Rain tire
Cara Krstolic, Chief Engineer and Director of Race Tire Engineering and Production says:
Last season we designed and developed our Firestone Firehawk primary tire compounds and constructions specifically to support the hybrid era of racing. Those remain unchanged heading into the 2025 season with the hybrid engine now used at every race.
Compared to the 2024 edition of the Grand Prix of St. Pete race without the hybrid engine, this year’s primary tire is expected to remain similar, with a slight increase in wear due to the extra hybrid weight.
In preparation for this season’s temporary street circuits, we worked with INDYCAR to provide a softer and faster wearing alternate (green sidewall incorporating guayule rubber) tire compound. This new compound will provide more grip but will wear more quickly, providing a bigger drop-off gap between the primary and alternate tire. The alternate compound is similar to what we ran at St. Pete in 2023 but will exhibit more wear and degradation on the heavier hybrid Indy car.”