Abrasion resistance is key for parts exposed to high friction or road debris. Manufacturers use hardened steel, polyurethane, or specialized coatings on these components. Drive belts, brake pads, and suspension bushings need high abrasion resistance to survive years of use. If a material wears down too fast, the component fails early.
Hoses under the hood also require tough outer layers. They constantly rub against other parts as the engine vibrates. Silicone hoses often offer better wear resistance than standard rubber. Upgrading to braided sleeves provides extra protection against friction.