Questions tagged [aerodynamics]

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

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13
votes
4answers
3k views

What would cause variable air resistance on a day with no wind?

I commute to work regularly. I find that on some days when there's no perceivable wind, I feel like there's almost no air resistance at all and it's so easy to ride at speed. It's also relatively ...
7
votes
3answers
1k views

DIY computational fluid dynamics for aerodynamics?

Has anyone experimented with using consumer 3D software to do CFD-like aerodynamics simulations? Specifically, I was thinking: Setup the bike on a trainer (with rider) Take a series photos, and plug ...
7
votes
2answers
3k views

Why choose a traditional frame over an aerodynamically streamlined frame?

I'm not talking specifically about triathlon frames, just frames which have aerodynamically shaped tubes. As I understand it, both types of frame are legal for road-racing under UCI rules. So, why ...
8
votes
2answers
4k views

How come some cyclists lean forward at a 45 - 60 degree angle and I don't?

I just wanted to ask how come some cyclists when they ride they lean forward, with their arms straight, resemble a 45 to 60 degree angle (which looks cool by the way). I have a hybrid bike and I wish ...
12
votes
3answers
2k views

What are the disadvantages of wearing an aero helmet?

During the Olympic Final of the Men's Keirin one competitor (Chris Hoy) was wearing an aero helmet (red helmet in the picture below), the other competitors wore normal helmets: The advantages of ...
19
votes
3answers
6k views

What are the most significant factors affecting downhill cruising speed?

When I'm riding with my friend, I notice that he rolls down hills significantly faster than me. We can be riding next to each other, both in a similar aerodynamic position, but if we both coast he ...
27
votes
6answers
8k views

Does drafting cause resistance to the lead rider?

I know that when riding close to another cyclist, I expend less energy to go the same speed. But does the Conservation of Energy "law" mean that the lead cyclist is going to expend more energy to ...
1
vote
1answer
1k views

Advice on aero wheels

I have decided to buy new wheels for this season. I'm currently riding the Bontrager Race Lite wheels that came with my bike, and now it's time to move to aero wheels to keep up. I'll do about 1300 km ...
1
vote
2answers
3k views

Crosswind effect on an aerodynamic front wheel vs a rear wheel

I am looking to purchase a new wheelset in the not too distant future and am debating between wheels that are 58mm and 85mm deep. Or, and this is the part I'm curious about, a hybrid of the two. (58 ...

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