| 摘要 |
A bicycle construction includes a unitary frame having a Y shape formed by a central longitudinal bar, a lower bar and an arcuate medial bar. The central longitudinal bar is bifurcated at its trailing end, forming first and second rear wheel mounting members that are positioned on opposite sides of a longitudinal axis of symmetry of the unitary frame. A first bore formed in the common leading end of the central longitudinal bar and the lower bar accommodates a handlebar tube. A second bore formed in a trailing end of the central longitudinal bar accommodates a seat support tube. A third bore formed in a trailing end of the lower bar accommodates a primary socket wheel axle. Fourth and fifth bores formed in respective trailing ends of the first and second wheel mounting members in cooperatively aligned relation to one another accommodate a secondary sprocket wheel axle. |
