Following the third and final round on U.S. soil at Indianapolis Motor Speedway, the 2013 MotoGP Championship headed back to Europe this weekend for the Czech Grand Prix at Bruno.
The track is challenging from a Bridgestone tire perspective due to the technical corners of the 3.34-mile circuit with huge elevation changes.
Brno has numerous straight sections joined together by a series of technical corners including four left-right corner combinations.
The circuit also features an elevation difference between the highest and lowest part of the circuit of over 70 meters which make braking into the downhill sections challenging, thus requiring the front tire to provide excellent stability. A high grip levels from the rear tire is also important to ensure good drive onto the straight parts of the circuit. Adding to the technical complexity of this circuit for tires is the abrasive tarmac which demands superior durability.
There are eight right-hand and six left-hand corners at this circuit and though asymmetric rear slicks are provided, the loads imposed across the left, center and right of the rear tire are similar. The rear slick tire options for CRT riders at Brno are the soft and medium compounds, while the works riders get the medium and hard compound options.
Bridgestone originally planned to introduce a new hard compound rear tire at the Czech Republic Grand Prix, but after recent testing at the Brno circuit has decided to change supply. Another hard tire specification which has a softer compound on left side with current hard compound on the right side will be supplied this weekend and this change was made in agreement with the Grand Prix commission at Indianapolis. Front slick options for the Czech Grand Prix are the soft and hard compounds and the main wet tire is the soft compound option.
Hiroshi Yamada (Manager, Bridgestone Motorsport Department) says: “For good reason Brno is one of the favorite tracks on the calendar for MotoGP racers and fans as it is a wide circuit with a technical layout that has produced many thrilling races over the years.
“There is always a huge crowd in the Czech Republic for MotoGP races and this also adds to the allure of the event. Last year at this circuit we saw an amazing last-lap battle between Jorge and Dani and I expect both these riders to be very competitive this weekend as they continue their recovery from injury, and focus on closing the championship points gap to Marc who is riding extremely well at the moment.”
Shinji Aoki (Manager, Bridgestone Motorsport Tire Development Department) says: “The Brno circuit was resurfaced in 2008 and since then has been quite abrasive on tires, posing more of a challenge for tire durability and requiring harder rubber compounds, particularly for the front tire. The corners are generally fast and flowing so the lateral loads generated are high – particularly on the right shoulders – and the elevation changes also present a challenge for the front tires, especially into the downhill corners where the weight transfer under braking places them under extreme loads.
“The medium speed corners require good shoulder stability from the rear tires and good traction on corner exit. Finding a good setup at this circuit is important, as excessive sliding from the rear at this circuit can hurt lap times and also rapidly accelerates tyre wear given the abrasiveness of the tarmac.”
Bridgestone slick compounds available: Front: Soft & Hard. Rear: Soft, Medium & Hard (Asymmetric)
Bridgestone wet tire compounds available: Soft (Main), Hard (Alternative)