It’s hard to argue that bicycles aren’t super handy. They get you from point A to B in a jiffy with little effort. Since these machines are so simple and convenient, why not use them for ...

The build takes a pretty ordinary bicycle, and replaces the rear brake disk with a large pulley for a toothed belt, which drives a smaller pulley, and through a shaft another set of pulleys to the ...

Idaho has built his very own human powered elevator as a means to gain access to his recently constructed treehouse. Schlussler came up with the idea of converting an old bicycle and pulley system ...

Some of the others are more reasonable, like a dog-wheel powered bike (don't say you haven't thought about it), which PopSci explains in the gallery The so-called "Poochmobile," invented by eighty ...