*** Welcome to piglix ***

Ultimate wheel


An ultimate wheel is a wheel with two pedals directly connected – similar to a unicycle and impossible wheel. It has no seat or frame but offset and functional pedals. There are several different designs: the most popular involves a solid or semi-solid disk inside a regular small bicycle wheel rim with the pedals are attached directly to the disk. A less common style uses metal cross braces instead of wood.

Some mounting and riding techniques include:


...
Wikipedia

...