The length of the pedals keeps changing, and you'll notice that neither of the pedals actually rotates around the hub: consistent with your point about the center of gravity being too far back, the circle the pedals are making is also shifted back too far.
The length of the pedals keeps changing, and you'll notice that neither of the pedals actually rotates around the hub: consistent with your point about the center of gravity being too far back, the circle the pedals are making is also shifted back too far.