Riding position is the big one: recumbents can be much faster. Even with upright bikes, though, there have been a bunch of iterations. I especially like the sa

Riding position is the big one: recumbents can be much faster. Even with upright bikes, though, there have been a bunch of iterations. I especially like the saga of Obree developing two new positions and having them both banned for being too good https://en.m.wikipedia.org/wiki/Graeme_Obree https://en.m.wikipedia.org/wiki/Graeme_Obree