Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Furnishings and Equipment (hierarchy name)
4. Recreational Artifacts (hierarchy name)
5. recreational artifacts (equipment)
6. [temporary alphabetical list: recreational artifacts]

Anotations

Scope note:

Exercise equipment consisting of a single wheel propelled by the user using two pedals while straddling a frame. The wheel and all elements are attached to a base, preventing locomotion. Handlebars are also sometimes present to provide support.