What is the World’s Smallest Bicycle ever Ridden?

The smallest bicycle ever ridden by a person had a front wheel that was .43 inches in diameter and a back wheel just over ½ an inch in diameter. This absurdly small bicycle was successfully ridden a little over 16 feet by a Polish man named Zbigniew Rozanek in 1998. This unbelievably small bicycle was specially designed to carry the weight of a human and still balance is such an extremely small size.