Bike porn

Thanks! now i understand better.
So now i also understand the bend seattubes a see now and then. And the ultimate "serious" bike would have: short wheelbase and zero clearences, "?" headtube angle and fork rake, and near to zero trail?

People do seem to like the way tight clearances look... How they actually ride/handle is a different matter.

This is a decent (if brief) overview of the forces at work:

http://www.cyclingtips.com.au/2011/02/the-geometry-of-bike-handling/

Track bikes with high bottom brackets and short chainstays are actually at a handling disadvantage compared to typical road bikes.