Firestone Racing will provide a total of eight sets of primary and alternate Firehawk tires for the Honda Indy Toronto race weekend. Additionally, each entry will have five sets of Firestone's new rain tire available.
The Firestone primary and alternate tire specifications for the 1.75-mile, 11-turn Exhibition Place street course are the same as those used earlier this season on street circuits at St. Petersburg, Long Beach, Brazil and Detroit. The specs feature updated tread compounds for 2012 applied to the same Firehawk street-course tire construction used throughout 2011.
The alternate tire program, a staple of the IZOD IndyCar Series since 2009, mandates a second tire specification at a road- or street-course race weekend using the same tire construction as the primary specification, but with a softer tread compound to provide more grip and faster lap times while trading off compound durability in exchange for those shorter-term advantages. Firestone's alternate tires are easily identified by their bright red sidewalls.
Per series regulations, all cars must use at least one set of primary tires and one new alternate set during the race, each for a minimum of two green-flag laps. Otherwise, teams are free to use their tire allotment as they see fit, though each car is limited to one set of tires (team choice of primary or alternate) for each qualifying segment.
The rain tire specification that debuted last month in Detroit is inspired by the Firestone Firehawk Wide Oval Indy 500 passenger car tire.