These protective vehicle accessories, typically constructed from rubber or plastic, are designed to be mounted behind the wheels of trucks and other large vehicles. Their primary function is to prevent road debris, such as mud, rocks, water, and snow, from being thrown into the air by the rotating tire. For example, a semi-truck traversing a gravel road would benefit greatly from the installation of these accessories to protect following vehicles.
The incorporation of these accessories contributes significantly to road safety by reducing the risk of damage to other vehicles and minimizing visibility obstructions. Furthermore, their use helps to maintain the condition of the vehicle itself by preventing excessive wear and tear from constant bombardment by road detritus. Historically, simple versions of these accessories have been employed since the early days of motor vehicles, evolving in design and materials to meet the demands of modern transportation.