2027 Smithco Dump Trailers For Sale

Smithco dump trailers are best known in the aggregate, road building, excavation, and heavy dirt markets for side dump configurations that prioritize stability, fast cycle times, and clean material discharge. On current-spec trailers, buyers will commonly see 40-foot tandem axle units and longer tri-axle versions with air ride suspension, heavy-duty cylinders, and rock tubs built from abrasion-resistant steel such as AR450. For operators hauling riprap, shot rock, sand, millings, or wet clay, tub material and cylinder design matter as much as rated capacity. A quarter-inch AR450 side and floor package is a common choice when trailer life in abrasive applications is a top priority.

A big buying decision in this category is tandem versus tri-axle. Tandem side dumps in the 40-foot range are common for general construction work, with water-level and heaped capacities often landing in the low-to-mid 20 cubic yard range and around 30-plus cubic yards heaped, depending on tub shape and spec. Tri-axle Smithco dump trailers add payload flexibility and can improve weight distribution, especially when spec'd with a rear lift axle and pressure regulation. Axle ratings around 25,000 pounds, 49-inch axle spacing, 11R24.5 rubber, and 16.5-inch brakes are all familiar specs in this class. Air ride remains a preferred suspension for many buyers because it helps protect the trailer structure, improves ride quality on rough haul roads, and can reduce shock to the tub and hinge system.

On a Smithco side dump, pay close attention to the hydraulic and chassis details. Features like a 2-way valve wired to the front, dump valve controls, remote grease lines to the fifth wheel plate and cylinders, and a removable kingpin with an 18-inch setting all affect daily usability and fleet compatibility. A bolt-on push block, ICC bumper, 2-speed landing gear, liquid-filled air gauge, and mechanical scale or scale gauge can make the trailer easier to run efficiently on jobsite and highway combinations. Buyers hauling in regulated environments should also verify ABS configuration, lighting package, and kingpin placement against their tractor setup and bridge law requirements.

Tarp and body details are equally important because they affect cleanup time, safety, and compliance. Electric mesh rollover tarps with lock-out systems are common on newer Smithco dump trailers and are especially useful for aggregate and demolition debris. Poly fenders, steel or mixed steel-aluminum wheel setups, and half-round or rock tub designs should be matched to the material stream and route conditions. If the trailer will spend most of its life off-road or in quarry service, prioritize tub steel, pivot design, and cylinder protection. If it will split time between paving support and regional hauling, focus more on suspension spec, axle spread, tare weight, and serviceability.