I have a question in my mind that I need answered. I am often thinking of ideas. "gee it would be cool if..." etc.
It would seem to me that with road bikes, the lighter the wheelset the better, and as few spokes that get used, there would be a significant strength increase by shortening the wheel. Why are there not road bikes with 20" wheels? I mean, if you were to put some thought into it, the bottom bracket and all would still be the same height, but instead of the chainstay angling up, it would be angled down a bit to make the bottom bracket higher. The head tube would be signifigantly longer, to compensate for the shorter fork. See the attached image. The black outline would be the standard road layout, and the red outline would show how it would be altered to run 20" wheels.
Am I nuts? There has to be a reason this hasn't been done before. I do realize that the chainrings would have to be quite a bit bigger to compensate for the smaller wheel, but I see no other disadvantages. It seems like the light wheels would have better acceleration. The frame would have more flex, maybe? And be a tad bit heavier?
Obviously I don't know why this would or wouldn't work better or worse than what's out there. Can anyone critique my idea?