Race Distance: 185.086 miles (94 laps around the 1.969-mile permanent road course). Potenza Race Tires Supplied: Bridgestone delivered 848 dry-condition ("slicks") and 304 wet-condition ("rains") Potenza race tires for use this weekend. All...
Race Distance: 185.086 miles (94 laps around the 1.969-mile permanent road course).
Potenza Race Tires Supplied: Bridgestone delivered 848 dry-condition ("slicks") and 304 wet-condition ("rains") Potenza race tires for use this weekend. All were produced at the Bridgestone Technical Center in Akron, Ohio. Per Champ Car World Series regulations, Bridgestone brought two dry-tire specifications and a single wet-tire spec, broken down in the following manner:
* Standard dry-condition tires: Each car receives six sets of standard slicks (24 tires) for the weekend, to use in practice, qualifying and race sessions. The standard dry-condition specification for this event contains the "softest" standard road-course tire compound and construction that Bridgestone employs in the series. It is the same spec run at Monterrey, Mexico, earlier this season and will be used later this season at Montreal and Laguna Seca.
* Alternate dry-condition tires: Each car receives two sets of alternate slicks (eight tires) to use this weekend. One set (new or used) must be used for a stint in Sunday's race, but there is no series mandate on when or how long it must be run. The construction of the alternate tire is identical to the standard slick, but the alternate tire possesses a tread compound with moderately increased grip ("softer"). While the alternate tire contains additional speed potential, it trades away some of the long-lasting durability that the standard spec enjoys.
* Wet-condition tires ("rains"): Each car receives up to four new sets of grooved-tread Potenza rain tires per weekend on road and street courses, as needed. In addition, each car may use two sets of same-spec rain tires issued at a previous event. Bridgestone has two rain-tire specifications at its disposal, one for the faster permanent road circuits and another for the slower, tighter street courses. The street-course rain tire is available this weekend.
Quote from Al Speyer, Executive Director, Bridgestone Motorsport:
"After discussion with Champ Car officials, we've decided to bring an alternate tire to Portland this weekend. We had a trial at Long Beach where we saw mixed results, and based on that we've worked on some improvements to the concept. The alternate tire for this course should have an even more noticeable effect than the one we saw in Long Beach, and teams should notice a tangible difference when they run their alternate sets. We've also enhanced the visual aspect of the tire with more clearly defined markings on the sidewall of the alternate tires, so it will be more obvious to the fans when teams are using their alternate sets."