| 摘要 |
A tube for use in a bicycle frame in which the tube has a first end and a second end, and a middle section extending between the ends. The first end, second end, and middle sections each have oval-shaped planar cross-sections. In the cross-sections of the first and second ends, the height is greater than the width. In the cross-section of the middle section, the width is greater than the height. This arrangement allows the middle section of the tube to flex vertically between it is narrower in the vertical direction. Likewise, this arrangement provides a strong connection point at the first and second ends which resists flex and movement vertically because the tube is thicker in the vertical direction. |
