Formula 1 isn't the only championship where tyre degradation is one of the biggest talking points this year. Junior single seater series have often tried to mimmick what we see at the top of the tree - although in the past that usually applied to the styling of the cars.
But for 2011, GP2, GP3 and the F3 Euro Series have all adopted the idea of having tyres that can't last as long as they should - be that a race distance, or in the case of GP2's feature race, a full stint.
GP2, as expected, has the most in common with what we've seen in the first four grands prix of the season. Some drivers were getting into all sorts of trouble in Turkey last weekend, and there was lots of yellow Pirelli tape being put over tyres that were in particularly bad shape in parc ferme after the race.
Some drivers had their tyres down to the canvas by the end of the race, while Dani Clos spoke of one of his front tyres deforming "like a head was trying to come out of it" as he plummeted down the order in the closing laps on Saturday.
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