Pentacycle said:I'll explain as far as I understand myself: Let's say two riders are riding together and have to ride same w/kg.(it's true what you say but a little more complicated) One rider is 48 kg, the other 61 kg. If both riders have a max of 6.5 W/kg they can sustain(so they'll be dropped if they get above that) and they both have the same 6.8 kg bike, the 61 kg rider has an absolute max power of 397W, the other of 312. But with their bikes they only have left: 5.7 W/kg for the 48kg rider and 5.85 W for the 61 kg rider.
Yea... but we don't know their max W/kg so we can't say who is more talented.
For air resistance if both riders have the same resistance the lighter one also has that disadvantage, because it's the same as with the fixed bike weight.
This means a rider who is heavier and thereby can produce more absolute power always gets the upper hand, if equally talented. The hypothetical 0.15 W/kg difference is a lot. Rujano on the Etna could only follow when he was completely behind Contador, but he was dropped when the wind came from the side.
But then again a smaller rider will have less air resistance as far as I know.