Amphibian Bicycle Can Travel on Land Or Water.
We’ll soon enter the rainy season here in Northern California, when many of our riverside bike paths will be inundated. With this bike I can just float the bike down the Guadalupe River straight to work, and then pedal upstream for the trip home. I don’t think those fat tires will fit on a bus bike rack, unfortunately.
From Modern Mechanix blog, which grabbed it from the December 1932 Popular Science magazine. There have been similar, more recent designs for the various kinetics contests out there.