Although disc wheels have not been produced in such great quantities as some of the other types, they have advanced far enough in practical application to demonstrate their possibilities and fundamental correctness. Distinction should be made between the wheel itself, the single-taper dished disc and other features such as tire, rim and hub applications. Single-taper dished-disc wheels were developed in France and in this country at about the same time but, on account of the variation in European and American tire practice, the resultant wheels took different forms.
The author describes these forms and comments upon them, the argument being favorable to the single-taper disc, and the statement is made that, given the data as to the service expected, the weight and power of the car, the single-disc wheel will compare favorably with any other type, since, when properly designed, the strains are diffused over the entire surface.