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Are the benefits of Aero Wheels negated by wide downtubes?

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Are the benefits of Aero Wheels negated by wide downtubes?

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Old 12-21-10, 08:40 PM
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Originally Posted by khill
My results for our local 10mile TT series...(Over the last year..)

Std road bike-24:41
Std road bike with clip on bars-23:38
TT bike non-aero. (Std wheels, helmet, water bottle in back pocket, etc) 22:36
TT bike full aero-22:15
Always keep in mind that times are not necessarily an absolute measure of what's working or not; conditions can often greatly impact performance, and depending on where you are in training often you'll improve because of the motor.
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Old 12-21-10, 08:53 PM
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Originally Posted by Racer Ex
Always keep in mind that times are not necessarily an absolute measure of what's working or not; conditions can often greatly impact performance, and depending on where you are in training often you'll improve because of the motor.
For Sure! All of these were repeated in those forms at least 2x over the last year and the times were all pretty close, except the non aero TT bike. I did get quicker at it since I rode that way the most.

Ken
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Old 12-23-10, 08:10 PM
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Originally Posted by spessx
Hey guys,

I have an '08 Trek Madone. Anyone familiar with that bike or a lot of the non aero carbon frames on the market know that the downtubes on these bikes are pretty wide - probably 3-4x the width of the front wheel.

So my question is this: Is there any advantage to putting aero wheels on this type of bike? Let me know what you think.

-s

Ok, so I read the question and thought to myself, Hmm, good question! Then I remembered that aero wheels aren't aero because of their front profile -- they're aero because of the deep dish rims and the type of spokes; you never see a rim that is wider than the tire anyway. So the front profile of the bike is not the only thing that matters for aerodynamics. Good question.
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