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