Originally Posted by sivat
I'm not saying that I know better than they do, but I know enough about engineering to know that not everybody who can afford to do it, does it. I'm just wondering if the R&D was actually done, or if they are just using the designs from their road bikes. More specifically, I'm wondering, if they are doing the research and engineering, what benefits are gained by the more slack HT (Though, 73.5 isn't all that slack, i've seen as low as 72, and vintage is usually 74-75), and what is it about CF that makes it possible when it appears to be impossible with steel. Vomitron mentions it is easier to paceline, which seems to make sense, though I'm not sure exactly why that would be.
The logic (apparently) is that more riders are coming from the road world, and training on road bikes, thus they are used to less twitchy steering geometry. Now, for the average world-class sprinter, at around turn 4, you're likely to think your headset is welded shut if you don't have a 75deg ht.
Seems like the bike is designed for kilo/tt/mass start. The slack(er) ht is probably just so road-trained cyclists will feel more comfortable in the pack.