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1

The key factor here is that the air at the hub is dirty - it's been disturbed by passing through the spokes and around the rim, so it's moving faster than the still air at the rim (slower relative to the bike), and it's turbulent. That makes improving aerodynamics both harder, and less important. The damage has already been done. Having a smooth outer ...


11

As long as you are moving through the air, aerodynamic drag will account for some portion of total drag. Here is a plot that shows the relative contribution of aerodynamic drag vs. rolling drag on total drag for a rider at constant speed on a flat surface with the given CdA (drag area) and Crr (coefficient of rolling resistance). There is no magic threshold ...


6

Schwalbe has a great chart from their rolling resistance page on major resistance force for bicycling. Noticeable air drag started from 15km/h and increase exponential after 20km/h. At 10Mph(16Kmh), good aero bikes doesn't show significant advantages. Even above 30km/h, typical aero bike cannot do much to reduce the air resistant : human are not ...


-3

In my experience it is begin at about 30 kmh and at like 50 kmh you really feel how the wind is hitting you in the face I guess faster you goes stronger the effect is. But it is important at any speed really, if its windy and you have loose clothes they act like a sail. aero bike for like 10mph ? you can walk faster I guess it will have less air resistance ...



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