1-3/4" diameter 5/16" wide.Rubber Tire for Hubley Motorcycle Tire, also used on a variety of Hubley, Kingsbury, Williams, and Arcade cars, outside diameter is 1-3/4" in., inside diameter is 1-1/8 in.  For hubs that fit this motorcyle tire.  Hubs available 1-9/16" Diameter.  Rubber and plated metal material. Used on Hubley cast iron motorcycles.