Behind the scenes of a Formula One tyre test

BBC Sport goes behind the scenes at a Formula One tyre test at Belgium's Spa-Francorchamps circuit with Pirelli test driver and BBC radio 5 live summariser Jaime Alguersuari.

Formula 1 tyre supplier Pirelli introduced a new range of tyres for 2012, making all four dry-weather compounds softer, as well as reducing the differences between them.

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