Unknown devices on automobile wheels are common in classic cars. I don't know what it's called and what it's used for.

It is the decoration on the outside of the tire fastening nut, with some logo on it, which has no practical effect. Mainly plays a decorative role, showing the unique style of the vehicle.

Three protruding things such as paddles are also easy to disassemble. Look carefully, the cross-sectional shape of the blade is V-shaped. According to the aerodynamic principle, negative air pressure will be formed during the wheel rotation, which makes the blades tend to cling to the hub and not fall off easily.

In the 1950s and 1970s, during the hippie era, automobile manufacturers designed and manufactured many exaggerated models, such as exaggerated decorations on the engine cover, exaggerated colors on the side walls and exaggerated tail fins. It is not surprising that there are also decorations on the wheels that show personality and style.