| 摘要 |
PURPOSE: A front wheel hub of a bicycle is provided to secure the smooth rotation of a wheel by reducing load and impact by using a dual bearing. CONSTITUTION: A front wheel hub of a bicycle comprises a hub flange(10), a holding protrusion(15), a hub cap(50), and a hub shaft(20). The hub flange comprises wire spoke connection hole(12). The hub flange comprises a through hole and a female thread portion is formed in the through hole. The hub cap covers the left end portion of the through hole of the hub frame by being coupled with the female thread portion. A protrusion sill(27) is formed in the hub shaft.
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