| 摘要 |
A tubular frame (1) for bicycles, particularly with classic diamond shape, comprising a tubular structure (2) that forms at least one front head tube (3) that can be connected to a front fork, a first substantially horizontal tubular body (4) that is functionally connected to the head tube (3) and forms an inlet (5) for mounting a saddle and a second oblique tubular body (6) that is functionally connected to the front head tube (3) and can support a central mechanism. At least one of the two tubular bodies (4,6) has a structurally asymmetric resisting transverse cross-section for asymmetric flexural and torsional stiffening with respect to the longitudinal plane of the frame (1). More specifically, the longitudinal plane is formed by the plane that passes through the axis of the first substantially horizontal tubular body (4) and through the axis of the second oblique tubular body (6).
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