Explore top-quality Freightliner Classic diesel fuel tanks at 4 State Trucks, available in sizes ranging from 50 to 150 gallons. Built with corrosion-resistant aluminum, these tanks come in lengths from 57 to 87 inches and diameters of 23 or 24 inches. Choose from front, center, or rear fill configurations, with popular options like 100-gallon front-fill and 150-gallon rear-fill models designed for durability and compatibility.