Bicycles Stack Exchange
Bicycles Stack Exchange

Questions tagged [aerodynamics]

Questions relating to a bicycle's ability to efficient move through the air.

67 questions
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What is a "gram" of drag?

Bike components or upgrades are sometimes quoted as saving some number of "grams" of drag. How can a gram, a unit of mass, be used to quantify drag, which is a force? And for extra credit, why is this a useful way to quantify drag?
Phil Frost
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Accurately replicating the resistance felt whilst riding via a resistance fan diy turbo trainer

If I were to build my own Lemond Revolution style turbo trainer (link below) could I use the air speed in meters/second^2 the rider is moving into as a good indicator of what type and size of fan to use? Or put the other way around could I use the…
user95786
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Independent ranking of bicycles aerodynamics

Are there any scientific and independent evaluations of different bicycles from an aerodynamics perspective?
Eyad
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4
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3 answers

Detachable(?) velomobile inspired parts (streamlined/prism)?

Fairings for an Upright Hybrid Bicycle? Thinking about real reinventing bicycle - in my opinion both upright and recumbents are very old and bad concepts, but I realized there are people who love to ban me for that ;-( Cui bono ;-) ? My best next…
Jan
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How much aerodynamic drag does each component contribute?

Obviously numbers will vary based on the specific bike, but what are some approximations of the drag contribution of individual components in a typical (non-aero) road bike? I have read in many places that the rider accounts for most of the drag. So…
Phil Frost
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4
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Is there any benefit to riders on the front of a paceline?

You can save a lot on air resistance by drafting a rider closely, i.e. riding close to their rear wheel. What about the rider in front? Is there a benefit, a loss, or is there no difference? Edit - is there any way or position ensuring front cannot…
Jan
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Aero bike considerations for purchase

I am trying to decide between aero bikes from two different brands. What are some of the things I should think about when comparing these two (or any other) aero bikes?
Omar
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Does hub diameter or hub size have a notice able effect on the aerodynamic performance of a wheel set?

If you were to change the rear hub on your hypothetical or real zipp 808 wheel set to a large diameter internal gear hub like a shimano alfine or a rohlhoff hub would there be a measure able aero dynamic effect?
user95786
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What position of saddle is best?

Almost all cyclists who ride road bikes set the seat so high, and when they're in the drops their body can be almost parallel with the road, reducing air resistance. However,their legs can't reach the road from the saddle, and their head is pushed…
Lan...
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