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Home > Forum > Triathlon Forum > FOP (top 5%) AG IM Bikers - what is your CdA & post a photo of your position?

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FOP (top 5%) AG IM Bikers - what is your CdA & post a photo of your position?
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Tri Wannabe
Sep 23, 14 10:10
Post #1 of 10 (2923 views)
This question comes up as an extension of a great thread from andreasjs (FOP (top 5%) AG IM bikers - what is your FTP per kg?)

For the fast bikers with an officially measured coefficient of drag, would you please share your CdA in your triathlon bike position and a profile photo of you in action on the bike?


Please also share your height, bike size, helmet choice, decision making process for equipment choice and any other pertinent measurements.


Let us learn how the best bikers become wind stealth...


Disclaimer: Of course, we all understand that many factors come into play in determining one's most efficient position on the bike, and a person's fit may not necessarily be appropriate for another person...

Thank you
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Re: FOP (top 5%) AG IM Bikers - what is your CdA & post a photo of your position? [Tri Wannabe] [ In reply to ]
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jackmott
Sep 23, 14 10:11
Post #2 of 10 (2921 views)
any interest in estimated CdA from field tests or collection of races?

Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter
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Re: FOP (top 5%) AG IM Bikers - what is your CdA & post a photo of your position? [jackmott] [ In reply to ]
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Tri Wannabe
Sep 23, 14 10:21
Post #3 of 10 (2897 views)
Absolutely! As long as the method of calculation for your CdA value is identified, it will allow us to be the judge.
Thanks
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Re: FOP (top 5%) AG IM Bikers - what is your CdA & post a photo of your position? [Tri Wannabe] [ In reply to ]
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jackmott
Sep 23, 14 10:26
Post #4 of 10 (2878 views)
Estimated CdA around .22-.23 from various TT results at 6'3" 175lbs



Estimated .19-.20 from various TT results at 5'10" 135lbs


Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter
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Re: FOP (top 5%) AG IM Bikers - what is your CdA & post a photo of your position? [jackmott] [ In reply to ]
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motoguy128
Sep 23, 14 14:51
Post #5 of 10 (2706 views)
BBS estimated @ 0.24 (best I can do.... my Stages PM is of course useless for precise measurement.... and as a result my BBS estimate is therefore suspect as well.

The best photo I have. Sorry.





TrainingBible Coaching
http://www.trainingbible.com
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Re: FOP (top 5%) AG IM Bikers - what is your CdA & post a photo of your position? [jackmott] [ In reply to ]
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Murphy'sLaw
Sep 23, 14 16:46
Post #6 of 10 (2606 views)
jackmott wrote:
Estimated CdA around .22-.23 from various TT results at 6'3" 175lbs



Estimated .19-.20 from various TT results at 5'10" 135lbs

JM - when'd ya score a P5??

And why doesn't the fastest rider in the family have it? ;-)

float , hammer , and jog

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Re: FOP (top 5%) AG IM Bikers - what is your CdA & post a photo of your position? [Murphy'sLaw] [ In reply to ]
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jackmott
Sep 23, 14 18:29
Post #7 of 10 (2513 views)
I borrowed it for a few duathlons and stage races in 2012-2013, marketing for the LBS, was the owner's bike.

At that time, I had all the TT records in the house, took them back while wife was pregnant. Genius. She got all but one back. Mopac TT no longer exists, so I own it by 2 second forever. muhahaha

Nevermind that she beat my 40k time by minutes..ugh

Murphy'sLaw wrote:

JM - when'd ya score a P5??

And why doesn't the fastest rider in the family have it? ;-)

Kat Hunter reports on the San Dimas Stage Race from inside the GC winning team
Aeroweenie.com -Compendium of Aero Data and Knowledge
Freelance sports & outdoors writer Kathryn Hunter
Last edited by: jackmott: Sep 23, 14 18:30
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Re: FOP (top 5%) AG IM Bikers - what is your CdA & post a photo of your position? [Tri Wannabe] [ In reply to ]
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desert dude
Sep 23, 14 19:17
Post #8 of 10 (2427 views)
Photo 17 I'll have to look up my CdA but it's pretty low maybe .20x iirc. I tested at the first AeroCamp.

I use a different helmet than pictured.

http://www.slowtwitch.com/..._Aero_Camp_4145.html
Brian Stover USAT LII
Accelerate3 Coaching
Insta

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Re: FOP (top 5%) AG IM Bikers - what is your CdA & post a photo of your position? [desert dude] [ In reply to ]
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PT
Sep 23, 14 23:39
Post #9 of 10 (2311 views)
Hi Brian,

Seeing as both you and the photo caption mention helmets, would you mind elaborating a little on that?

tx
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Re: FOP (top 5%) AG IM Bikers - what is your CdA & post a photo of your position? [desert dude] [ In reply to ]
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knighty76
Sep 24, 14 3:00
Post #10 of 10 (2212 views)
Brian do you mind me asking what your effective seat-tube angle is there? Hard to tell from the picture, but doesn't look mega aggressive, almost as if you are sitting back a little and stretching out at the front. Can imagine the benefit in reduced frontal area for your upper arms, stretched out that way. Ok getting the power out?

Big thanks, Rich.
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