Obviously, I was referring to the gap of 28 seconds behind - e.g. the time delta of the pit stop. An 'undercut' only works if you can pit into a gap and then use the fresh rubber to drive faster than the car you are racing is able to do on its old tires. If Hamilton had not controlled the pace by driving slower than he needed to, the gap to Grosjean would have opened sooner. He then would have made himself vulnerable to being undercut too early in the race when a 1-stop was still too ambitious.Andres125sx wrote: ↑18 Sep 2018, 17:28Sorry but this makes no sense at all. Gaps are opened by the car in front, if he can, the one who always try to prevent an undercut from his chaser... openning a gap
So Hamilton's game plan was to drive slow and keep the traffic bunched up, so that his closest competitors couldn't pit, because if they would, they'd end up in traffic and be stuck. Obviously, this achieved another advantage too; that being: he conserved his own tires so that when Vettel/Ferrari did bounce and pitted into the first small gap that emerged (the one between Perez and Grosjean), he had enough performance in his tires to react and counter the fast outlap from Vettel.
Alternatively, if he had pushed from the beginning, he would have had the gap to Grosjean already around lap 10. If Vettel had remained close enough (all indications from FP2 were that Ferrari easily had the pace), they would have faced the dilemma of either preempting the undercut themselves, but having to go for the US tire (for a fast outlap) and then having to do 51 laps on them or again letting Vettel pounce first, but then not having enough rubber to react and counter the undercut.
Driving slow and controlling the field was the best way to ensure he kept track position.