| http://www.w3.org/ns/prov#value | - hubless wheel; at least two wheel assemblies wherein at least one of the at least two wheel assemblies is a hubless wheel comprised of a non-rotational inner rim in communication with the foot support, a rotatable outer rim in communication with and rotating around the non-rotational inner rim; a wheel frame attached to the non-rotational inner rim and surrounding the rotatable outer rim, wherein
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