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 disk of wood fitted inside a regular small bicycle wheel rim. Pedals are attached directly to the wooden disk. This design is strong and easy to build but is relatively heavy. A less common style uses metal cross braces instead of wood.
Some mounting and riding techniques include: