Max had actually reported on the radio before the pitstop that he was getting vibrations, and that he thought the tyre didn't look good.

The teams explanation about the state of the tyre make it sound as if it might have failed, and the tyre company haven't worked out yet what the cause of the failures was - but among their suspicions are things that make it sound like it was risky for Max to carry on.

We'll probably never know for sure if it would have failed, and with hindsight he should have just slowed down by about 2 seconds a lap to try make sure it was safe... but they couldn't have known at the time, so playing it safe was a good way to go, especially as they were getting a 2nd place when they expected 3rd.