OK. So it's late at night, you long should have gone to bed, but you can't sleep so you are channel surfing and you run across some grade B, no make that a grade C or D or F, movie from the 1950's in which Humankind, in complete madness, has committed near total thermonuclear destruction and only a handful of irradiated mutants still crawl about on the charred remains of our dear plant Earth squabbling with each other over the very few orts of ghastly tasting food left to fight over.

This is the bike they would build.

And if they built two of them, they would hold a race.

The winner, of course, gets the remaining food scraps.