Originally Posted by
cyccommute
I have taken Physics 101 (and several more physics courses as well). I see nothing wrong with CheGiantForLife‘s point. If bike weight means nothing, why has significant effort be expended in reducing bike weight? If bicycle weight doesn’t matter why don’t pro racers ride 40 lb bicycles?
We're talking about training here, not racing. You can do the same effort on a light or heavy bike, the lighter one will be faster.