Vettel?s puncture set to go unexplained

Pirelli motorsport director Paul Hembery believes his company and Red Bull will probably never know what caused Sebastian Vettel's right-rear tyre to suffer an instant deflation while leading the Abu Dhabi Grand Prix after ruling out tyre failure. An investigation carried out by both Pirelli and Red Bull could find no definitive explanation for what happened, and Hembery admitted that in this case they did not have enough evidence to go on

Elmer George Masten Gregory Clint Bowyer Brian Gubby Dale Arnold Jarrett