The spinner on automobile wheels historically refers to knock-off hub nuts or center caps. They may be the actual, or intended to simulate, the design used on antique vehicles or vintage sports cars. A "spinner wheel" in contemporary usage is a type of hubcap or inner wheel ornament, that spins independently inside of a wheel itself when the vehicle is in motion, and continues to spin once the vehicle has come to a stop. Original use The spinner or "knock-off" originated with Rudge-Whitworth centerlock wire wheels and hubs, which were first patented in 1908. The spinner was a threaded, winged nut designed to keep the wheel fastened to the hub. They were screwed on and "knocked on tightly" using a hammer, hence the name "knock-offs". Most setups will feature right-hand threads on the left side of the vehicle, and left-hand threads (rotate clockwise to remove) on the vehicle's right side so the screw-on spinner would stay tightened as the auto was in forward motion. This style of "knock-off" wheel was common on road cars until the development of the lug nut method attaching the wheel. Spinner hubcaps The spinner hubcap was introduced into the commercial vehicle and passenger automobile market in the 1930s. Automotive designer Harley Earl expressed a brash philosophy behind his 1950s automobiles that included "glittering spinner hubcaps." During the 1950s and 1960s automobile manufacturers offered simulated wire wheel covers for a look of luxury that featured criss-crossing spokes designed to look like the real wire wheels that were used on vehicles in the 1920s and 1930s. These "spinner-wheel covers" were available on standard as well as featured on custom cars, and lowriders quickly adapted them for their own vehicles. During the early-1960s, the simulated wire wheel covers returned, but with new look designed to emphasize sportiness with their radiating spokes and center "spinner caps." These classic center spinner caps feature a rigidly mounted propeller-like center element, usually with two or three projecting "blades." They were intended to simulate the knock-off hubs that were used on vintage racing vehicles and classic sports cars where a hammer or special wrench was used on the spinner to release or tighten the wheel to the hub. These spinner hubcaps were most often an optional appearance upgrade to the standard equipment hubcaps or full wheel covers that attached to stamped steel wheels. Top trim models sometimes included spinner wheel covers as standard