Depends. Are you trying to make a road bike in to a steep/low tri bike, a slack/low time trial bike, or an ITU style bike?

Hey John A, you may find this a valuable resource. I wrote it a few years ago.

http://www.xtri.com/article.asp?id=126

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Tom Demerly
The Tri Shop.com

Aero bars with road bikes was covered already today on another post.

Will you be riding in a standard 73/74 degree position or are you trying to mimic a tri bike with a forward seat post. If you're in a standard road position you want the aero bars to be shorter than on a tri bike in order not to be too stretched out. I'm 5'10" and have found the Syntace C2 small size to work excellent with my road bike. Another good aero bar is the the Profile Aerolite because of its adjustability. Try to keep a 90 degree angle from torso/shoulder/elbow. You'll need to take some photos of yourself with a digital camera while on the trainer.

Thanks, I sort of know where this is heading, the colango for the roadie stuff and a cervelo for the tri stuff. Could be worse.

But while I'm saving..... I'll use it in a standard "road position" and I have the profile carbon stryke aerobar wich looks very adjustable. And I can't afford to loose "much" handling as I'm not a bike handling master.

You have given me some good basics rules, if anyone has pictures of a person on a good fited roadbike with aerobars (and description on why it's good).

I'll try it out today on the road, I hope I survive.

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Bent Olav Olsen, recreational triathlete?