Pirelli’s Paul Hembery believes that something on the track was the likely cause in most cases, while also suggesting that a piece of debris was responsible for the Vettel problem.
Inevitably, given the events of Silverstone and the high-speed nature of Spa, teams and drivers are looking for some reassurances from Pirelli.
“It looks on the Red Bull as if something has been rubbing on the surface and then cut straight through the surface,” said Hembery. “And on the Ferrari there are two quite clear holes through the top of the tread. We’ve got to go and look at the track later and see what’s been turns 13 and 15.
“To be honest, I wouldn’t say it’s normal punctures, but it’s the sort of thing you’d see throughout the weekend. We’ve seen a lot of signs on other tires, as well, with some surface cuts. There’s clearly something, although I can’t tell you what it is yet. It’s damage from external forces.
“To be honest, it could be anything. Unfortunately, like in the case of Alonso, you’ve got two holes through the top. What on earth can cause that? You’ve got to go and find it, and that’s obviously what we want to do.
“We’ve seen some cuts on some other tires, so there’s clearly something somewhere that’s causing an issue.”
Asked if it was a worry for Pirelli, he said: “It’s a worry for the sport, because we have to go and find out what it is. There’s not a lot we can do. We’ll try our very best to identify it and give indications of what can be causing it.”
Elaborating on Vettel’s issue, Hembery said: “Something’s caught up between the floor and the tire in that case.”
The FIA now monitors pressure and cambers, and Hembery insisted that everyone was running within the prescribed limits.