One particularly creative tinkerer in China recently unveiled what might be the largest motorcycle on the planet.

Riding this bike takes balls. Gigantic balls. Quite possibly the largest pair of balls you've ever seen in one place. Round wheels are out and spherical wheels are in with this project from students at San Jose State University, the end result of which will be a rideable electric motorcycle that uses balls instead of wheels.

No longer will you have to decide between the comfort and convenience of a car and the unadulterated chick magnetism of a motorcycle. In one sexy concept vehicle, you can now have both.

Dutch vehicle designer Allert Jacobs has been working on his "Aerocycle" for well on three years now. Yet even with its fiberglass shell and heavy modifications, the whole thing didn't cost much more than $5,000. All his hard work paid off, too: he gets an impressive 214 miles to the gallon.