Connecting cantilever structure for bicycle mud-guards

A connecting cantilever structure for bicycle mud-guards comprising:

• an inversed U groove shaped connecting cantilever with a contracting annulus that provides an adjustable affixing means adapted to receive a seat post pipe of a bicycle, said offering means coupled to a mounting shelf with a curved mudguard formed integrally to said mounting shelf;
• wherein
• said connecting cantilever is formed with a flat upper surface and two side walls extending downward therefrom, a bottom and tailing end of said connecting cantilever are open, said side walls of said connecting cantilever include a lateral unsymetric undulated inner side walls for increased strength and rigidity so that said inner surfaces of said side walls are reinforced for support of said connecting cantilever, and
• said connecting cantilever comprises a longitudinal slot in an upper surface thereof, a releasable securing means extends through said slot and is received in a fixed receiving means said mounting shelf so that a position of said mounting shelf, and therefore a position of said mudguard, can be adjusted relative to the seat post pipe of the bicycle, in a longitudinal direction along the said slot.