Bridgestone rider tire choice analysis, MotoGP Laguna Seca USA

Bridgestone talks about the new 2010 dual-compound rear slicks used at Laguna Seca, and what tires were used by whom in the race

Mark Wernham

Round 9: United States GP – Mazda Raceway Laguna Seca, Sunday 25 July 2010

Bridgestone slick compounds available: Front: Medium, Hard. Rear: Medium, Hard (asymmetric)

Fiat Yamaha’s Jorge Lorenzo won the United States Grand Prix, setting an impressive pace throughout on harder front and softer asymmetric rear Bridgestone slicks to record a new fastest total race time at Laguna Seca. In response to rider requests made last season, Bridgestone brought their asymmetric rear slicks to Laguna Seca this year. The performance improvement provided by these tires was also highlighted by a new lap record set by Ducati Marlboro’s Casey Stoner, who finished second, whilst a resurgent Fiat Yamaha rider Valentino Rossi grabbed the final step of the podium from Repsol Honda’s Andrea Dovizioso.

Every rider favored the softer option asymmetric rear slick tire which featured the improved-for-2010 medium compound rubber to offer better warm-up performance. Its increased level of performance at higher temperatures was the reason it was sufficiently durable for race distance even as the track temperature reached 44 degrees Celsius (111 degrees Fahrenheit). Last year the top five riders used the harder rear, but this year all riders used the softer option, which is a good comparison of the improved durability of this improved medium compound. As a further performance indicator, during the morning’s warm-up session when the track temperature was just 21 degrees C (70 degrees F), Lorenzo and Stoner both went quicker using the asymmetric rears than last year’s fastest race lap.

Hiroshi Yamada – Manager, Bridgestone Motorsport Department
"I am happy with the overall result here as it shows that we have a good process of turning rider feedback into positive action, the results of which have been very good here this weekend. I'd like to congratulate Jorge for his sixth win of the season, and also to Casey for setting a new lap record here. It is great to see Valentino back on the podium again, too."

Tohru Ubukata – Manager, Bridgestone Motorcycle Tire Development Department
"The consistency and level of performance of our softer asymmetric rear slick tires was good this weekend so I am very happy. Not only did Casey set a new lap record, but his fastest lap was more than 0.5seconds quicker than the best lap from last year's race and the total race time was over six seconds faster, both of which are good indicators of the improved performance provided by our asymmetric slicks here at Laguna."

Jorge Lorenzo – Fiat Yamaha Team – Race Winner
"This is very special. I made a good start but was overtaken on the outside into turn one. I tried to overtake as soon as possible and once I was in third I thought 'now we are here and can push'. This track was very painful for me last year so for this it was important to finish, and we won so now I have more points for the gap in the championship which is so nice. Now I holiday and relax, draw away the tension and the pressure before Brno."

Top ten classification (Sunday 14:03 GMT-7)

Pos. Rider Team Race time Gap Front spec Rear spec
1. Jorge Lorenzo Fiat Yamaha Team 43m54.873s Hard Medium
2. Casey Stoner Ducati Marlboro Team 43m58.390s +3.517s Hard Medium
3. Valentino Rossi Fiat Yamaha Team 44m08.293s +13.420s Hard Medium
4. Andrea Dovizioso Repsol Honda Team 44m09.061s +14.188s Hard Medium
5. Nicky Hayden Ducati Marlboro Team 44m09.474s +14.601s Hard Medium
6. Ben Spies Monster Tech 3 Yamaha 44m13.910s +19.037s Hard Medium
7. Colin Edwards Monster Tech 3 Yamaha Team 44m35.594s +40.721s Hard Medium
8. Marco Melandri San Carlo Honda Gresini 44m42.092s +47.219s Hard Medium
9. Mika Kallio Pramac Racing Team 44m42.092s +47.219s Medium Medium
10. Loris Capirossi Rizla Suzuki MotoGP 44m47.687s +52.814s Hard Medium

Weather: Dry. Ambient 23°C (73.4°F); Track 36°C (96.8°F) [Bridgestone measurement]