To add to your coming confusion :
http://www.peterwhitecycles.com/fitting.htm
http://www.slowtwitch.com/mainheadings/techctr/bikefit.html (not just tri athletes)
http://www.peterwhitecycles.com/fitting.htm
http://www.slowtwitch.com/mainheadings/techctr/bikefit.html (not just tri athletes)