| 摘要 |
A wheel assembly ( 10 ) is disclosed, including a wheel base ( 14 ) and a wheel rim member ( 16 ). The wheel base ( 14 ) has along at least a portion of its length a non-circular cross sectional outer surface ( 86 ). The wheel rim member ( 16 ) has along at least a portion of its length a mating non-circular cross sectional inner surface ( 88 ). The inner surface ( 88 ) of the wheel rim member ( 16 ) interacts with the outer surface ( 86 ) of the wheel base ( 14 ) to restrict relative rotation of the wheel rim member ( 16 ) on the wheel base ( 14 ).
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