Sonoma: Firestone Racing preview

Race Distance: 172.5 miles/277.6 km (75 laps on the 2.303-mile/3.706-km permanent road course). Firestone Firehawk Race Tires Supplied: * Primary (black-sidewall) dry-condition slicks: 756, each entry gets six sets (24 total tires); * ...

Race Distance: 172.5 miles/277.6 km (75 laps on the 2.303-mile/3.706-km permanent road course).

Firestone Firehawk Race Tires Supplied:

* Primary (black-sidewall) dry-condition slicks: 756, each entry gets six sets (24 total tires);

* Alternate (red-sidewall) dry-condition slicks: 366, each entry gets three sets (12 total tires);

* Wet-condition (rain) tires with grooved tread pattern: 468, each entry has five sets available as needed.

Per series regulations, all cars must use at least one primary set of tires and one new alternate set during the race, each for a minimum of two green-flag laps, unless rain tires are used - then teams are free to use their tire allotment as they see fit. The primary tire specification for Infineon was used as the alternate tire at the 2010 Barber and Edmonton events. The alternates are new for this race. The primary spec is the "softest" primary Firestone will use all season. The alternate tires are identical in construction to the primaries but contain an even softer tread compound which will provide more grip and faster lap times, yet will trade off some compound durability in exchange for those shorter-term advantages.

From Al Speyer, Executive Director, Firestone Racing: "Even though Will Power has already clinched the road course championship and the Mario Andretti Trophy, I expect that there is still a lot of excitement in store for the final road course race of the season. The overall championship points battle is tightening up as we head to the home stretch. Firestone Racing is bringing primary and alternate tire specifications that are new to Infineon Raceway. This track is an interesting challenge with its elevation changes and big braking zones, so a tire with plenty of grip is going to be very important here. That is why our engineers selected a primary tire that has actually been used previously this season as an alternate tire at two different tracks. With an alternate specification a step softer than that, tire grip should not be an issue."

Firestone "Tire-ific" Move of the Race: Following each race, Firestone Racing nominates three drivers who best utilized their Firestone tires to make a bold, dramatic move during the event. Fans can go to www.indycar.com to vote for the nominee they believe made the most "Tire-ific" move of the race. In a record-setting vote that saw more than 213,000 total ballots cast, Ryan-Hunter Reay won the award for the Mid-Ohio race two weeks ago, after recovering from an early pit-lane incident that put him near the rear of the field to finish 10th. Hunter-Reay will receive the $10,000 prize during Sunday's pre-race activities at Infineon.

-source: firestone racing

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Series IndyCar