I've heard it both ways. . . some people say that, if your not a featherweight, the weight of your bicycle doesn't really matter, because the combined weight is still rather high. I've also heard theories that your weight is like a baseline and the bike is something you carry with you, so its weight does matter. Lastly, someone once told me there's some kind of difference between suspended weight and weight beneath the suspension (the suspension being your legs). Anybody know enough physics to shed some light on this?