Prepare your semi to be Ready for the Road Ahead , with the Fleet Engineers Poly Aerodynamic Quarter Fender that provides enhanced wheel protection. Due to its exterior design, this replacement component is able to create a cover around the wheel to protect the axle and metallic components from rust, corrosion, and other damage. Constructed with resilient materials to endure the wear and tear of everyday working conditions. FleetPride is your First Click in Heavy Duty .