With optimal track conditions for the race and plenty of time to refine a dry setup, tire choice for Sunday’s race was uniform across the whole grid with the harder front slick used in combination with the softer rear slick.Q&A with Shinji Aoki – Manager, Bridgestone Motorsport Tyre Development DepartmentQ. Motegi is referred to as a “stop-and-go” circuit. How do the frequent acceleration and braking zones influence tire development for the Japanese Grand Prix?Shinji Aoki says: “The layout of Motegi places a lot of stress on the center section of the front and rear tires, so our tire selection has to take this into account while also considering the wide range of weather conditions that are possible here. For the front tire, the frequent heavy braking requires superior front-end stability, so we provide the hard and medium compound options alongside the soft compound in case of very cool conditions.“The center section of the asymmetric rear slicks features a hard, durable rubber that can withstand the repeated acceleration on the abrasive tarmac, while the shoulders use relatively softer compounds to keep the tire in its optimum temperature window and provide good edge grip through the slower sections.”Q. Did the increased weight and power output of the 1000cc machines require any change in the tire allocation compared to last year?
Shinji Aoki says: “Over the season we have gathered a lot of data on the performance dynamics of the 1000cc MotoGP machines and have increased our knowledge significantly in this regard. Based on our data analysis, we were confident that the 2012 specification tires could be offered in the same compounds as last year at Motegi and still provide the best levels of performance.“The wider operating temperature of this year’s MotoGP tires was able to manage the increased loads under braking, cornering and acceleration, and this was reflected in a new pole position and circuit lap record being set and a total race time that was sixteen seconds quicker than last year.”Q. Every rider selected the softer rear and harder front slick for the race. Can you explain why?Shinji Aoki says: “The tire selection for the race is once again related to the ‘stop-and-go’ nature of Motegi. Track conditions for Sunday’s race were almost ideal with dry tarmac and track temperatures around thirty degrees Celsius so all riders went for the tire combination that provided the maximum level of performance as they didn’t have to consider track temperatures being too high or low.“If track temperatures were significantly cooler, which is always a possibility in Japan in October, than it is likely that some riders, particular those on CRT machines might have selected the softer front slick option for more confidence in the early laps.”Bridgestone slick compounds available at Motegi MotoGP:
Front: Soft, Medium, Hard.
Rear: Soft, Medium (Asymmetric)
Bridgestone wet tire compounds available: Soft (Main), Hard (Alternative)