Minimizer is the leading manufacturer of poly fenders and mud flaps for semi-trucks, producing heavy-duty polyethylene fenders and mud flap systems that outlast steel in the corrosion and impact demands of commercial trucking. Their fenders are a popular upgrade on Peterbilt trucks for drivers who want a low-maintenance alternative to traditional steel fenders that rust and dent. Browse Minimizer poly fenders and mud flap systems compatible with Peterbilt drive axle configurations.