SILVERSTONE, England—Pirelli Tyre S.p.A. is under the gun to explain a series of spectacular tire failures at this weekend's British Grand Prix.
Company representatives declined to speculate too much on the causes other than to insist a change made in its bonding process was not responsible.
The change, introduced at Silverstone, was designed to stop tire delaminations seen earlier in the year. At Silverstone four drivers suffered catastrophic tire failures during the race.
Several drivers also made pit stops with tires that had issues or were on the verge of failing.
"There have obviously been some issues with rear-left tire failures which we have not seen before," said Paul Hembery, Pirelli's motorsports director. "We are taking the situation very seriously and we are currently investigating all tires to determine the cause as soon as possible, ahead of the next Grand Prix in Germany."