Williams Brothers Vintage Wheels - 5 inchLinen Color, ABS plastic Hub with Hollow, Rubber based tire stuffed with extruded foam. An Asymmetrical profile wheel. Available in Black or White tire. The White Tyre was the original color of all tires up until the mid 1910's, and used by all sides during World War One throughout the war and into the early 1920's. Pure rubber gave way to the "gray" tires with the introduction of Carbon into the rubber to increase wear resistance.