embodiment of the inventive tool is shown in an exploded view in fig1 the tool embodiment is comprised of eight main components that are shown and labeled accordingly the components are made with metal plastic and rubber materials referring to fig1 a the inventive tool is provided with mounting base 1 which is attached to a frame member of a bicycle while in use mounting base 1 can be machined in virtually any practical shape from a variety of metal and polymeric materials in the particular embodiment presently described the base has a rectangular form factor however it is to be understood that the shape of the base is by no means limited to the presently described embodiment it is a desired aspect of the present invention that at least a portion of the top surface be planar to accommodate further assembly components of the tool as described in detail below it is also a desired aspect of the present invention that at least part of the bottom surface of the base be non planar to provide a greater contact area in comparison to a flat surface engendering increased friction between the two opposing surfaces and resulting in a highly stable and secure attachment when fastened to a bicycle frame member of elliptical or circular cross section in the present embodiment of the invention shown in fig1 v shaped groove 2 spanning the bottom surface of the base along its long.