Pirelli have revealed that the tyre which failed on Nico Rosberg's car at 200mph during their private test in Bahrain was a 'prototype which will not be proposed again'."Just spun at full speed 320km/h on Bahrain straight cause my tyre blew up without warning. Thanks to that need to get some toilet paper now," the German tweeted on Friday morning, before deleting it soon afterwards.
Nevertheless, the message prompted considerable alarm, with Pirelli forced to change their rubber midway through the 2013 season following a spate of blow-outs during the British GP.
However, F1's sole tyre manufacturer have now clarified that the tyre Rosberg was running at the time of the incident...
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