I have a few questions about the Y-Foil frame (beam frame)
Firstly as far as i have seen, there is no rear suspension system, does the fact that there is no seat tube offer suspension and dampening, or is the frame to ridged and strong to do that?
Secondly, i am having trouble understanding where the advantages come from and why it was banned. I understand that while made from carbon fiber and the shape of the tubing would mean it is lightweight and aerodynamic, but ofcourse a frame with a seat tube can also be designed with those 2 aspects. so what advantages does having no seat tube provide?