Originally Posted by
RubeRad
I think droy45 was just talking about the comfort factor of weight on the torso (adding to pressure at the butt/seat interface) vs weight on the bike. But perhaps you meant to respond to Aravilar, who was asking about mass and speed...
Precisely so, I must have clicked on the wrong post to quote.
I'm just letting the side conversation run, although I will say that weight matters on the coast-down due to higher density objects having a higher terminal velocity. And more momentum per drag area when the slope levels off. Not sure where a vacuum enters into it.