Road Cycling - this may be a bizarre idea

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View Full Version : this may be a bizarre idea


usnagent007
06-06-02, 08:20 PM
I have an aluminum frame, somewhat normal geometry, but I'd like to push the aero envelope.

What I'm envisioning is filling in the area between the seatstays and seat tube (above the rear tire) with some kind of aerodynamic shielding....plastic, aluminum, whatever...not as a permanent attachment, but as something that can be added during races to streamline the frame (clip on? velcro? clamp?). The Kestrel Talon's aero framework inspires this thinking.

Because the front of the seat tube is round and not elliptical, I'd like to consider doing something there too....and perhaps immediately behind the headtube.

Is this preposterous? Not legal? Are there companies that already do what I'm talking about? Is it even worth it? Just go buy a Kestrel Talon already??? :confused:

Many thanks for whatever insight you are able to provide.


usnagent007
06-06-02, 08:23 PM
Kestrel Talon above; my bike is below. Many thanks.

ljbike
06-06-02, 08:32 PM
You might want to look at the Litespeed BLADE www.litespeed.com


usnagent007
06-06-02, 08:38 PM
:eek:

oxologic
06-06-02, 10:58 PM
Hmm, I don't think the Litespeed Blade is VERY aerodynamic. If you look carefully at the weld at the seat collar, it is really bad. If it wasn't for another website, I probably would not have noticed it on the Litespeed website either. I think they will improve on it.

Anyway, I don't think having any special designs to make it more aerodynamic is very legal, other than a few exceptions like the wheel eating into the seat tube.

MichaelW
06-07-02, 02:52 AM
In UCI races, you cannot have non-structural aerodynamic elements.
The bike accounts for about 10% of aerodynamic drag. You can get more aero by reducing your frontal area. Get low and thin. Move your hands and feet closer together and your back horizontal.

You can try and stop air entering between your knees. A wider seatpost is more helpful here than a very narrow one. The round front is not a problem, but the trailing edge could be a bit more aero.

AndrewP
06-07-02, 10:36 AM
These bikes are shaped for style, not performance. Since the airflow is pretty disturbed by the front wheel, forks and handlebars before it gets to the frame, aerodynamic shaping of the frame will have negligible effect. I would still like to have any of those bikes.