Standard bicycle front fork design showing crown and steerer tube configurations 插畫檔

A precise nineteenth-century black and white technical diagram illustrates a conventional front fork assembly for safety bicycles under the French title "Fourche normale." Originating in France, the mechanical line drawing presents two comparative structural layouts: a complete front fork with a defined crown and steerer tube on the left, juxtaposed on the right with a simplified profile of the hollow tubular fork legs. The schematic blueprint utilizes clean, unshaded vector lines to demonstrate the basic standardized geometry used as a manufacturing benchmark before the introduction of complex suspension links during the late-Victorian cycling boom.