Aerodynamic assembly for bike handlebars

Aerodynamic assembly for a bike handlebar, the assembly including two distinct extension devices forming a first left extension device and a second right extension device, wherein each of the two extension devices comprises:

• a first armrest-forming part, able to be fastened on a transverse bar of a bike handlebars and that extends longitudinally forwards, said first armrest forming part having a longitudinal extension, perpendicularly past said transverse bar, said longitudinal extension terminating in a free open end portion, an upper surface of the first armrest-forming part with said corresponding longitudinal extension together forming a receiving surface for a forearm part of a cyclist;
• and
• a second extension forming part, fastened, in a removable manner to a corresponding said longitudinal extension, projecting from inside said free open end portion thereof, the second extension-forming part being able to slide longitudinally relative to said longitudinal extension, perpendicular to said transverse bar and extendable further therefrom, allowing an adjustment of a distance separating ends of the second extension-forming part from the said free open end of said first armrest-forming part,
• wherein, for each of the two extension devices, an upper surface of the second extension-forming part is substantially in the extension of the upper surface of the first armrest-forming part so as longitudinally to increase the receiving surface for each forearm of a cyclist and the upper surface of the first armrest-forming part and the upper surface of the second extension-forming part are substantially flat.