Bar width is one of those topics thats always hotly debated in cycling circles. Everyones got an opinion on whats right, but are we just chasing trends or is there actually some science behind it? So heres the question - why do we still insist on narrow bars for road riding and wide bars for mountain biking? Is it purely a matter of aesthetics or is there a genuine ergonomic benefit to choosing one width over another? And dont even get me started on the so-called experts who claim that a 40cm bar is the new standard for road bikes - whats the logic behind that, exactly? Are our shoulders getting narrower or something? Can someone please explain to me why were still stuck in this narrow-is-better mentality when it comes to road bike design?