I suspect that nobody thought of a 2 wheel design because nobody thought it would be stable. The hinge between the front and back wheel is crucial. Even today, few bicyclists understand how a bicycle is able to turn and remain upright.
None of the early designs seemed to have any brakes, making them quite impractical.
Without modern steel and machined parts, a bicycle of wood and iron would simply be too heavy.
None of the early designs seemed to have any brakes, making them quite impractical.
Without modern steel and machined parts, a bicycle of wood and iron would simply be too heavy.