At a weight of 78kg (though he is probably lighter than this) Wout Van Aert got 3rd fastest time, around 6.4w/kg. At 78kg, that is around 500w for the climb.
Dumoulin at 69kg, would have needed around 420w or so on his TT bike with higher weight, but more aero position. 6.1w/kg.
Ritchie Porte at 62kg, would have needed around 420w for his time, about 6.77w/kg.
Maybe not, he publicly stated he was 78kg at the tour last year.
Perhaps more like 75kg? He looks more muscly than Sam Bennett, and he's a couple of inches taller as well.
At a weight of 78kg (though he is probably lighter than this) Wout Van Aert got 3rd fastest time, around 6.4w/kg. At 78kg, that is around 500w for the climb.
Dumoulin at 69kg, would have needed around 420w or so on his TT bike with higher weight, but more aero position. 6.1w/kg.
Ritchie Porte at 62kg, would have needed around 420w for his time, about 6.77w/kg.