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need help trouble shooting my position....(3 posts)

need help trouble shooting my position....Gall
Mar 27, 2003 1:33 PM
Hello,

I m setting up my y foil with aerobars in the hope to be able to do some TT and tri's on it. It seems everyother day I come up with a new problem. Here is the new/next one:

When I drop into the aerobars I loose power. It seems like I m able to create more power in the drops or when riding on the hoods.

What do you all think this loss of power could be from?

Thanks for your helP!

gall
re: need help trouble shooting my position....brider
Mar 27, 2003 2:48 PM
Sounds like you're at the limits of your hip angle. By dropping down to the aero-bars, you're closing up your hip angle. If that's near the limits of your flexibility, you would most likely lose power. Also, you could be affecting your breathing. Solution? Well, you have two potentials:

(1) Raise the bars. Narrow is more important than low, but you still want to go as low as you can WITHOUT LOSING POWER. The most aero position is useless if you can't get power to the pedals. Jurgen Zack has a pretty high bar position, but he has been the most consistent bike performer at Hawaii Ironman, holding the course record for many years.

(2) Bring everything forward. The ideal aero position would be to rotate your most powerful road position forward about the BB. There's some GREAT fit info on the Slowtwitch site. What you may find, however, is that the bike's handling is compromised by moving a lot more weight onto the front wheel. In that case, you may need to compromise.

Hope that helps.
That's sound advice.sn69
Mar 28, 2003 11:15 AM
At Slowtwitch, Bicyclesports and Bike Sport Michigan, you'll find a trove of info related to road bike adaptation. For some people, it seems to be the key, but for others notsomuch.

If you are intent on using your Trek, then I'd agree with brider. Get a higher stem (or flip it over if it's a threadless), and think about sliding your seat forward on the rails. There are also several forward seatpost options, including tri-specific posts by Profile and Nitto, and "flippable" posts by Thompson and Control Tech.

Still, make the adjustments in small intervals. Doing too much at once can easily aggrivate tendons, muscles, etc to the point that you might injure yourself. Also, pay particular attention to your torso angle and your breathing. Not many people can hold an extreme aero position like Steve Larson, and two top tier triathletes have badly injured their colons trying to hold extreme positions for too long.

As a good starting point, I'd recommend the Karma Sutra of Bike Position at www.bikesportmichigan.com . Tom Demerly includes some great graphics that make the point.

Good luck,
Scott