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How can I get more aero?
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I measured my frontal area with bike to be about 0.435 m^2. Using a Cd of 0.7. That corresponds to a CdA of 0.305.

Any constructive tips to getting more aero.

Here are some pictures. Thanks




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Re: How can I get more aero? [therascal] [ In reply to ]
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white background? No messy rooms or garages?

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I'll be what I am
A solitary man
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Re: How can I get more aero? [last tri in 83] [ In reply to ]
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get s-bend bars instead of cervelo standard aerobar

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Latest Duct tape QR Superfull fashion model
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Re: How can I get more aero? [therascal] [ In reply to ]
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Shave your legs

Lose the saddle hydration

go lower

aero helmet

race wheels

shoe covers

why did you photo shop the picture, ashamed of where you live?

Jonathan Blyer,
ACME Bicycle Co., Brooklyn, NY
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Re: How can I get more aero? [jonblyer] [ In reply to ]
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BTW: All my spacers are out and my 10 degree stem is already flipped down
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Re: How can I get more aero? [therascal] [ In reply to ]
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they make 17 degree stems.

if there are spacers under your elbow rests you could remove those.

Jonathan Blyer,
ACME Bicycle Co., Brooklyn, NY
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Re: How can I get more aero? [therascal] [ In reply to ]
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How long did it take you to "white-out" everything???? lost hours of training...
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Re: How can I get more aero? [3forall] [ In reply to ]
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I needed to white everything out to calculate my frontal area, and wanted to create an image mask so that I can more easily compare position changes on the side and frontal views.
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Re: How can I get more aero? [therascal] [ In reply to ]
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Remember that if you calculate your cda to use the position you will use in riding on the road and at the load you will use tt'ing. You can get a pretty narrow profile if you are spinning easy and looking at the floor. it's not all about aero. Comfort/power/aero trade off means there is a wide fluctuation with the fastest being the best mix of all components.

Andrew
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Re: How can I get more aero? [therascal] [ In reply to ]
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You look good. I'll see you in Kona.
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Re: How can I get more aero? [yeahitsgotahemi] [ In reply to ]
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s-bends are only good for slam position
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Re: How can I get more aero? [Manko] [ In reply to ]
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Thanks. I averaged the calculated frontal area from 5 frontal photos riding at power. I just posted these as an example. If you look carefully, the black and white one is not the same silhouette as the color one.

Just looking to see how I can get more aero. It seems that it would be "easier" to gain speed by becoming more aero as opposed to increasing power which takes more time. Obviously, I'd like to do both.

Of course, there is a tradeoff in aeroness and comfort and power generation. I am comfortable now, but maybe could push it by going slightly lower.
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Re: How can I get more aero? [therascal] [ In reply to ]
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Don't listen to these "low hawks." You are PLENTY low. If you were to relax your shoulder blades, you'd have a damn flat back!

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Re: How can I get more aero? [therascal] [ In reply to ]
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Could try moving the elbow pads in.

This is your life, and it's ending one minute at a time. - Fight Club
Industry Brat.
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Re: How can I get more aero? [therascal] [ In reply to ]
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Wear sunglasses.

fka: bassman

After the swim, I'm a fish outta water.
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Re: How can I get more aero? [bassman] [ In reply to ]
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Call Gary T up and get a spot in the fall wind tunnel session in SD. All the eyeball comments from the gallery are worth about what you paid for them. Look at Lance, Floyd, and Tyler. Three of the top TT riders in the world. They all look different and they all could be ripped apart by the folks on this board, yet from what I have read they are all pretty slick in the tunnel and maximise their Watts for the position they ride in.

I don't think a cookie cutter approach like low and narow or try to look like Basso is the end all for positioning. In my opinion Basso is one of the best looking riders in the bunch. I don't think you can possibly figure out your fastest position without some flow studies.
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Re: How can I get more aero? [therascal] [ In reply to ]
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Post this on biketechreview.com.

You won't get any sense from the fools over here.
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Re: How can I get more aero? [Andy G] [ In reply to ]
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AndyG wrote: Post this on biketechreview.com.

You won't get any sense from the fools over here.

This comment gets the second "AMEN" from me today.



Quid quid latine dictum sit altum videtur
(That which is said in Latin sounds profound)
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Re: How can I get more aero? [therascal] [ In reply to ]
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First off- it looks like you have a great position. My guess is you're on the larger side to still have an approximate CdA of 0.3.

You could try raising your forearms until the tops are about parallel to the ground. This should result in a slight decrease to your frontal area, and is what John Cobb used to stress at the best arm angle.

I'm not sure going lower will help. That hunch in your back will likely stay in the same place and not result in less frontal area. You can even produce more frontal area with a lower position when your elbows and upper arms begin to get wider than your knees. Of course you could get lower and pull the elbows in, but then you're opening up a few more variables with possible reduced power, comfort, etc.
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Re: How can I get more aero? [swimbike] [ In reply to ]
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Thanks for the tips. I guess I'll post to biketechreview.
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Re: How can I get more aero? [therascal] [ In reply to ]
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You have the bike on a trainer but it does not seem as if there is a riser for the front wheel which makes your front end artificially lower than where it would be on the road which makes me wonder if the calculations presented are valid?

Is there a riser there that I am not seeing? It seems to me as if the top tube is slanting downward.
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Re: How can I get more aero? [konaby2008] [ In reply to ]
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I agree... nice attention to detail


- Nick
Now that I know some of you guys look through the special needs bags for kicks, I'm gonna put some really weird stuff in mine. I can see it now. "What the heck was he going to do with a family pack of KFC chicken, a football helmet full of peanut butter, a 12 inch rubber dildo, and naked pictures of Bea Arthur?"
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Re: How can I get more aero? [therascal] [ In reply to ]
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Here is my 2 cents. You look great in a static pic, I would work on not gawking while riding. Everytime you look down or up or over you break the aero position. You may already be able to hold your position for a long time if not work on conditioning your body for that.

Being aero is more about riding in the correct position than about having the fancy aero stuff.

Shad
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Re: How can I get more aero? [therascal] [ In reply to ]
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Your position looks good to me. It may not be as low as it appears. Looking at the relative positions of your wheels your bike is not level in the picture, rather it is is pointing somewhat "downhill."
I would also add that you should tuck in the helmet strap, anything that flaps around will create drag
Last edited by: Johnny99: Aug 19, 05 9:33
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Re: How can I get more aero? [therascal] [ In reply to ]
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smaller frame... i am 6'2 and ride a 55cm TiPhoon with flat headset cap and no spacers

36 kona qualifiers 2006-'23 - 3 Kona Podiums - 4 OA IM AG wins - 5 IM AG wins - 18 70.3 AG wins
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