Originally Posted by
bikecommuter13
I have two wheels with the same cassette. When I put wheel #1 into the bike, spin it, I rotates well and stops slowly. For wheel #2, it rotates and then stops faster than wheel #1. Can I assume the hub on wheel #1 is better and faster? Is there such as a thing as a faster hub and thus a faster bike?
In general, no. Mechanical resistance is a small portion of the drag on you and the bike and it becomes proportionally less with greater speed. Here's a nice graph:
(From
Bicycle Drag Force Formulas )
If you want to go faster, work on these things in this order:
1. Your physical condition
2. Your aero position
3. Your bike's implementation