Bicycle frame made up of welded tubes of round or oval section, changing or otherwise, allowing excellent rigidity to be obtained

摘要

The present invention describes a bicycle frame (4) made of a metal (steel or aluminium alloy or titanium alloy) consisting of an assembly of curved or straight tubes of oval or round section with changing or non-changing profile which provides excellent rigidity and optimised mechanical efficiency depending on the ability of each user. This invention is aimed at any programme of use (on-road, track, all-terrain (mountain biking), racing, triathlon, excursion (touring), etc.). <IMAGE>