The invention relates to a bicycle frame having a front fork, a back fork, a steering head sleeve and a pedal shaft sleeve.
Such a frame is generally known. The known frame comprises tubes which are mutually secured, mainly into triangles, by means of so called lugs (insert sleeves). In order to guarantee sufficient rigidity and strength against compression, flexing and torsional forces, which act in combination, this frame has to be manufactured of relatively thick and therefore heavy material.
The invention aims at obtaining a decrease of the weight and simultaneously a more rigid frame.