Pirelli tests at Valencia, Spain

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The test also marked the first time that Spanish driver Pedro de la Rosa drove for Pirelli, having been announced as test driver last month.

Following work carried out to define both the compound and structure of Pirelli's slick tires - which will be offered to Formula One teams in four different variants next year - the focus now switched to tires for wet conditions.

Valencia, a well-known Formula One testing venue that is also famous for hosting motorbike races was chosen because of its technical and compact nature that allowed Pirelli's engineers to assess every aspect of the tire's performance.

In order to make the track wet, it was sprayed with water during both days of the two-day test: a light covering to check the performance of the new intermediate tires and then a denser covering to try out the full wet rubber. Although conditions remained warm and dry in Valencia, with ambient temperatures in the region of 75 degrees Fahrenheit, it is easier to test wet tires when it is not actually raining as the water on the track dries more consistently. This enables accurate data to be recorded: an essential priority when testing.

Driving last year's Toyota TF109 used by Pirelli for testing, de la Rosa covered just over 650 kilometers during the course of the two days, having started his program running on slick tires in order to establish a benchmark time.

The 39-year-old Spaniard was recruited because of his recent Formula One experience and renowned testing abilities, which allowed him to give plenty of useful feedback to Pirelli's engineers.

Pirelli's motorsport director Paul Hembery commented, "As we were running our intermediate and wet tires for the very first time, effectively our program was starting from scratch once more. We worked through our schedule exactly as planned, and we were able to get an initial impression of our performance in wet and drying conditions. This has enabled us to identify the areas in which we are strong and the areas that we need to develop further, which is always the aim in testing. It's been great working with Pedro de la Rosa, whose experience has given us a well-informed perspective on the characteristics of our tires. So far our schedule is going exactly to plan, and we look forward to continuing our work at what is a very exciting time for us during the next test sessions as well as back at base in Milan."

De la Rosa added, "It's a real pleasure for me to be working with Pirelli this year, and I'm delighted to have finally had the chance to try out these tires. We completed all the work we wanted to do during this initial session, and now we have a clearer idea about future avenues for development."

Pirelli also used the Valencia test to carry out development of its new GP2 rubber, with Giorgio Pantano driving the new Renault-powered single-seater.

Pirelli's next tire test will be at the Circuit de Catalunya in Barcelona at the end of the month.

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