In 1948, a group of makers in Chicago's "National Bicycle Dealers’ Association" took to modding their bikes in very creative and downright weird ways. They are the progenitors of Cyclecide, San Francisco's crazy bike carnival and rodeo creators! Above, the "Gangbusters Bike" outfitted with "13 shotguns, two revolvers, six bayonets and a flare gun." At right, the "Uno-Wheel," which "if braked suddenly, has been known to spin its rider round and round inside the big main wheel." More photos at LIFE. "Hell on Wheels: Life With Mutant Bicycles"