What is a hubcap?

A hubcap is a decorative cover for the hub of a wheel on a vehicle, designed to enhance its appearance while also protecting the wheel's components. Typically made of plastic or metal, hubcaps can vary in design and size, fitting specific types of wheels. They may also serve to conceal lug nuts and help improve aerodynamics. While they were once common on many vehicles, many modern cars use alloy wheels that do not require hubcaps.