Monowheels are a very odd and futuristic means of transport, but despite that they have a long and rich history. This is one of the earliest known monowheels, built in the 1869, it was in direct competition with the early bicycles and we all know how that went. This is an accurate model, exported in fbx and obj formats, you can find more information on :http://www.douglas-self.com/MUSEUM/TRANSPORT/motorwhl/motorwhl.htm#rous