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Forget the aero wheelset. Forget the "tri" water bottle holders. Get a handlebar bag.

post #1 of 9
Thread Starter 

oh, and DO drop your stem (you might need to do some stretching and core work for this).

 

 

AKA  Lance Armstrong's trainer gets ridden again:

 

http://janheine.wordpress.com/2012/05/02/aerodynamics-of-real-world-bicycles/

 

 

 

Quote:
What you wear and how you position yourself on the bike has the largest impact on the aerodynamics. For example, simply raising your stem by 20 mm (3/4 in) increases the drag by 5%. (For comparison, other studies indicate that aero wheels bring an advantage of only 3%.) The difference between a close-fitting jacket and a looser cycling jacket is a full 8% increase in the overall wind resistance of your bike!
 
Perhaps more surprising to many, front bags were more aerodynamic than rear ones. A handlebar bag was more aerodynamic than a Carradice saddlebag that extended just slightly beyond the hips of the rider (see photo at the top of this post). Front panniers (on low-rider racks) were more aerodynamic than rear panniers.
post #2 of 9

A top power analyst/aerodynamicist for cycling has said Heine's data are imprecise (I guess that's the techical term for junk).

 

Mike

post #3 of 9
Thread Starter 

OTOH, "precise" data is completely unusable by any rider other than the actual one tested.   

 

If we simply look at what he has isolated as  factors sufficient to overcome rider variation "noise" then the results can be both usable and accurate (even if they are imprecise).

 

 

Of course the experiment does not even try to address rider power, rider effort, or rider efficiency issues.    I'm sure a power analyst worth their salt can find an overall optimum that won't be the the same as the optimum based on external wind drag.

post #4 of 9

I started reading, and then realized it was on a rando site. It suddenly became irrelevant.

post #5 of 9

It's just Jan being Jan...

 

 

In engineering terms "garbage in, garbage out"

post #6 of 9

Does a dry chain increase resistance much? I rode a century Sunday on a bike that was last ridden a year ago on a dusty trail, and I forgot to  clean and/or lube before setting out.

 

 How much would you estimate the baggy shorts increased my drag?

post #7 of 9

Lamé

Quote:
Originally Posted by telerod15 View Post

 

 

 How much would you estimate the baggy shorts increased my drag?

 

 

Hotpants or a skirt/dress would increase the drag factor, but not shorts per se.  rolleyes.gif  Gold Lamé has a very high drag quotient no matter what the style.

post #8 of 9
Quote:
Originally Posted by Taxman View Post

 rolleyes.gif  Gold Lamé has a very high drag quotient no matter what the style.

 

Paola Pezzo won the Olympics wearing it!

 

pezzo.jpg

post #9 of 9

A fetching look for the Dykes on Bikes at the next Gay Mardi Gras?

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EpicSki › The Barking Bear Forums › Off-Season Sports & The Lighter Side › Cycling › Forget the aero wheelset. Forget the "tri" water bottle holders. Get a handlebar bag.