What Is A Unicycle?

u-ni-cy-cle (n.) a vehicle that has a single wheel and is usually propelled by pedals, date:1869

standard   unicycle

"Regular-size" Standard Unicycles include all wheel diameters from 16" to 27" though the most common are 20" and 24". Standards can range from 10" or less (midgets) to 56 inches or more(big wheel). Ultimate wheel unicycles have no saddle or frame.

Giraffe Unicycles, usually about 5-6 feet off the ground, can be chain driven or wheel to wheel, as shown below.