Originally Posted by Triguy
I wouldn't give up on trying to get low.
This is a good discussion.
I think depending on which event you are focussing on and your physiology does play a part in deciding how low to go...
From 2005 I had focussed on Duathlons and now over the last 18 months I've only been racing on the road and velodrome. In doing so my upper body has started to morph towards a roadies build, so the combination of reduced upper body mass, going lower and turtling has given my major reductions in my CdA. Noting also I now don't need to concern myself with running off the bike either means I can force myself to ride a more extreme position.
On the other hand, at the same day at the wind tunnel was a local triathlete. With his swimmers shoulder, no lowering of his positon had any impact in reducing his CdA. In fact the only way which helped him was an extreme Flandis position which as he isn't restricted by UCI rules like I am is able to use. So in the end he moved the bars back up after trying them lower, producing more power and with a more comfortable position run better after the bike.
Comfort plays an even bigger part in IM too. Take a look at footage of any IM - the number of riders in the last third of an IM bike leg sitting up! It's far better overall to compromise the drop a little and ride the whole ride in the aerobars.