Deda elementi m35 carbon road bar the deda elementi m35 handlebar and its stem trentacinque are the greatest innovation in the field of components for high performance road racing bicycles no handlebar in the world has such a diameter the diameter is the main factor of magnitude in the moment of inertia of the section of the handlebar the moment of inertia is what defines the rigidity of your handlebars what all riders are looking for as insufficient stiffness causes dissipation of your