Red Bull, Ferrari, Mercedes and Toro Rosso have all taken part in a three-day test, which started on Tuesday at the Sakhir circuit, as the the Italian company looks to adjust to the demands next season's extensive rule changes will demand of the rubber.
Pirelli had found itself at the centre of unwanted attention when a spate of tyre failures blighted the British Grand Prix at Silverstone in June, which led to a change in tyre construction for the second half of the 2013 season.
Rosberg's Mercedes team-mate Lewis Hamilton was among the drivers to be affected on that day, and the German revealed on Twitter that he himself had suffered a frightening 200mph blow-out on Thursday morning.
The tweet, which was later deleted, read: ''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...''
But Pirelli released a statement outlining that the tyres used by Rosberg were a prototype that will not be used during the 2014 season.
It read: "The tyre tests in Bahrain regarded a number of prototypes, which were completely innovative in terms of structure and compounds, with the aim of developing the most suitable solutions for the next season.
"This morning Nico Rosberg's Mercedes was fitted with one of these prototypes, a tyre which had only been tested in the laboratory and which will not be proposed again.
"Thus, the safety of the tyres which will be supplied for the next Championship is not in question.
"The accident which happened to Rosberg's car is being investigated and the findings will be communicated to the FIA and the teams."