Originally Posted by
vadimivich
In all practicality, for bicycle purposes that means that rotating mass is a zero sum game - bearing smoothness matters far more, since it's where friction is being applied. All in all, a 15 pound bike will go the same speed with the same power and gearing no matter how the weight is distributed.
A lot of cyclists have been wasting their money not only on lighter wheels, but more aerodynamic ones as well. Now that we know where the real gains are, we'll all add 4mph to our speeds...