A Freightliner Cascadia 2018-2025 Polymer Quarter Fender Assembly is a protective component installed on the truck’s rear side, just above the wheels, designed to shield the vehicle and nearby cars from road debris, mud, and water. Made from durable polymer materials, it’s lightweight yet strong and specifically fits Freightliner Cascadia models from 2018 to 2025. This fender assembly helps maintain the truck’s appearance and reduce wear and tear by preventing damage from elements kicked up by the tires.