The colnago v1 rall the tube shapes on this frame including the fork legs and the rear triangle have been tested and studied in the wind tunnel to minimize drag from a structural point of view the best shapes for bicycle frame tubes have been circular or polygonal shaped as they are able to maximize the flexural and torsional rigidity regardless of frame size from the aerodynamic point of view the best sections have a drop shape they minimize wind resistance with the same front footpri