Formula One world championship leader Max Verstappen said on Thursday he was unhappy with Pirelli's explanation for a high-speed tire burst that led him to victory at the Azerbaijan Grand Prix.
Red Bull's Verstappen suffered a direct left-back failure while leading up to the end of the 6 June race in Baku.
Aston Martin's Canadian Lance Stroll had crashed earlier with a similar failure.
Sole supplier Pirelli on Tuesday denied any production or quality defects and acknowledged that the teams had followed set standards when it came to tire fit.
This indicates how the tires were run contributed to the incidents.
Asked at the French Grand Prix if he was happy with Pirelli's clarification, the 23-year-old Dutch driver replied: "Not personally.
"I think the team did everything they should have done, they followed all the guidelines with the tire pressure in the beginning.
"Of course we will increase the pressure here for this weekend. 100% sure we will. Maybe it has something to do with what happened in Baku, but it would also be nice to know if it was related to tire pressure Just speak.
"It will be a little easier to understand than the explanation we've found so far."
Pirelli said in its statement that the cause was "a circumference break on the inner sidewall, which may be related to the condition of the tire's tread."
Verstappen said he felt lucky to have narrowly escaped the accident.
"I was actually lucky enough to hit the wall on the right instead of the left. I think it would have been a really big impact if I went to the left," he said.
Speaking later on Thursday, Pirelli Motorsport boss Mario Isola gave further explanation of the failures, claiming that the tread pressure on the two cars was lower than expected after being on the track, creating additional stress on the shoulder of the tire. and resulted in failure.
He reiterated that neither team had broken the rules regarding tire pressures because they met the minimum pressure when the tires were checked before getting on the car, but that the pressure had not reached the pressure that Pirelli once had. It was expected to be on track - something that will be regulated next season but is not currently monitored by the FIA.
"The rules don't say what pressure you have to respect," Isola said. "So I can't say that we are doing anything against regulation looking for more performance because if they respect the initial pressure, then at the moment they are following the rules.
“If the same thing happens next year, with a standard sensor [supplied by the FIA], and we put [minimum] running pressure, in that case they would be against the rules. But this year it is not, and It is not possible to do this as we do not have sensor where we can rely on the measurement.
"Obviously, every team is looking for performance. They're racing here, they're not here just to cruise around the track. And that means, looking for performance, we know if you're looking for a little less pressure. You will get some exposure if you go for .
"This means they are looking for performance and running parameters that did not match our prediction."