Quadruple-axle dump trucks are available for sale online at CommercialTruckTrader.com, AtkinsonTruckSales.com and TruckPaper.com, as of 2015. Some of the manufacturers are Mack, International, Kenworth, Peterbilt and Ford.
Commercial Truck Trader's listings include new and used quad dump trucks, and users can sort the results by the manufacturer and location of the seller. Many of the models have one or two modular axles that the driver lowers to the ground for the heaviest loads.
Atkinson Truck Sales groups some of its listings by model. It has Caterpillars, Western Stars, Volvos, Sterlings and Freightliners. It lists the newer models first.
Truck Paper does not let users sort its listings by drivetrain, so the quad dump trucks are interspersed throughout the 3,500 listings.