Drivers will start the Belgian grand prix unsure as to what caused Nico Rosberg's horror 300kph tyre blowout of Friday. Pirelli said on Saturday that it had ruled out a structural failure, while the FIA made tweaks to the kerbs at the fabled Eau Rouge corner ahead of qualifying. As to the exact cause of the blowout, however, Mercedes' Rosberg said on Saturday: "It is still not understood. "What is assumed is that it must have been something from the outside -- that is the theory. But nobody actually knows," he is quoted by Speed Week. "So that is still worrying for everybody. We have done a few things to help it, but for sure we need to keep a close eye on it so that it...
Full Story »