I hear people talking about a bike weighing too much, or don't put that on the bike it will weigh it down. Whats up with this talk? Will 8 oz really make a bike harder to pedal? I was in a store today and I picked up a water bottle cage and the dude there says "no, no, get this one it weighs half of what that one weighs".
Maybe someone could shed some light on this subject.
Does weight really matter much?
If so, how much weight can be added before you feel the difference?