Erik Voldengen

I believe there's more to it than that. The best way I've found to transfer
bike fit is by using Park's worksheet. It requires a lot of patience and
precision, but it works.

http://www.parktool.com/repair/readhowto.asp?id=130

-Erik

-----Original Message-----
From: obra-bounces@list.obra.org [mailto:obra-bounces@list.obra.org] On
Behalf Of T. Kenji Sugahara
Sent: Thursday, February 22, 2007 10:29 AM
To: obra@list.obra.org
Subject: [OBRA Chat] Bike Measurement Transfer Question

Hey folks,

A question for the list:

I had a really good bike fit this year on my road bike. I want to transfer
those measurements to a TT bike.
My road bike has a STA of 74 degrees (52.5 ETT) and the TT bike has a STA of
76 degrees (50.5 ETT).

I know the more aggressive TT angle engages more the hamstrings and glutes-
for tri-geeks- to save the legs for running. As I don't do tri's, would it
be more advantageous to set up the bike as close as I can to my road bike
setup? If that's the case, is it correct that I need to move the saddle
back and drop the saddle a bit to maintain the same distance to the BB? (.5
cm drop for every cm movement back?)

Would the correct equation for the required change in distance be the
following?
(52.5*cos(74)) - (50.5*cos(76))= difference (2.26 cm)

Any suggestions, pointers would be appreciated.

Thanks!

Kenji
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