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2026 Big Tex 25DU-20 Tandem Dual Gooseneck Dump Trailer

2026 Big Tex 25DU-20 Tandem Dual Gooseneck Dump Trailer · Big Tex 25DU-20 – 20′ Tandem Dual Gooseneck Dump Trailer with Ramps When you need a dump trailer that can handle serious material without apologizing for its size, the Big Tex 25DU-20 brings the muscle. This 20′ tandem dual gooseneck dump trailer combines a 25,000-lb GVWR, 16,500-lb factory cargo capacity, 48″ tall sides, 7-gauge steel floor and 45° dump angle into one heavy-duty package. This particular configuration also includes the 8′ slide-in ramp package, making it useful for more than just hauling and dumping material. Need to load equipment? You’ve got ramps. Need to haul dirt, gravel, brush or demolition debris? You’ve got a 20′ dump box. Need to get a big load out of the trailer? The 45° dump angle and hydraulic scissor lift are ready to earn their keep. The pictures may show a tarp, but here’s the important distinction: Big Tex provides the formed tarp shroud as standard equipment, while the actual roll tarp is an option available at Old South. Specifications Specification Details Manufacturer Big Tex Trailers Model 25DU-20 Trailer Type Tandem Dual Gooseneck Dump Trailer Pull Type Gooseneck GVWR 25,000 lbs GAWR 10,000 lbs per axle Factory Empty Weight 8,500 lbs Factory Cargo Capacity 16,500 lbs Bed Length 20′ Bed Width 92″ Side Height 48″ Dump Angle 45° Approx. Standard Volume 20.5 cubic yards Axles Tandem 10,000-lb Cambered Axles Hubs Oil Bath with Valcrum Caps Brakes Forward Self-Adjusting Electric Brakes on Both Axles Suspension Heavy-Duty 30,000-lb Adjustable Frame 12″ I-Beam Crossmembers 3″ Channel on 16″ Centers Floor 7-Gauge Smooth Steel Coupler Square Adjustable Crank 2-5/16″ Gooseneck Jacks Dual 12,000-lb Side-Wind Drop-Leg Hydraulics Self-Contained Scissor Lift Dump Function Power Up / Gravity Down Rear Gate Double Rear Doors Ramps 8′ Slide-In Ramp Package — Equipped Top Rail 4″ × 2″ Rectangular Tubing Sides 48″ Tall, 12-Gauge with Formed Channel Supports Tie-Downs Four 5/8″ D-Rings Cargo Control J-Hooks Along Sides and Rear Stake Pockets Along Both Sides Tarp Shroud Fully Formed Tarp Shroud Roll Tarp Not equipped but available Tires ST235/80R16 Load Range E Radial, Dual Wheels 8-Lug Black Mod Steel Spare Mount Side Spare Tire Mount Lighting Recessed, Grommet-Mounted LED Trailer Plug 7-Way RV Battery 12V Deep Cycle Battery Charger 5A 110V Onboard Charger Breakaway Complete Breakaway System Color Black Big Tex currently lists the 25DU-20 at 25,000-lb GVWR, 8,500-lb factory empty weight and 16,500-lb factory cargo capacity. The manufacturer’s current page also lists the 8′ slide-in ramps as an available package and the formed tarp shroud as standard, with roll-tarp options available separately. Factory weights and capacities are manufacturer-listed figures. Actual trailer weight and available payload can vary with configuration and installed options. The certification/VIN label on the individual trailer is the final authority. Features & Benefits 25,000-Lb GVWR The 25,000-lb GVWR puts the 25DU-20 firmly into the heavy-duty dump-trailer category. With a manufacturer-listed 16,500-lb cargo capacity, there’s enough trailer underneath you to tackle serious loads of dirt, gravel, demolition debris, brush and other jobsite material. Of course, material density matters. A trailer can have room left in the box and still be overweight, so always load according to the actual material weight and the trailer’s ratings. 20′ Dump Box with 48″ Sides The 20′ bed gives you substantial hauling volume without needing to step up to a longer trailer. The 48″ tall, 12-gauge sides use formed channel supports to provide the structure needed for demanding dump-trailer work. Big Tex’s current dump application guide lists the 25DU-20 at approximately 20.5 cubic yards of standard volume. 7-Gauge Steel Floor The floor is built from 7-gauge smooth steel, giving the dump box a heavy-duty foundation for material hauling. That’s the sort of construction you want when the daily routine involves more than a few bags of mulch and a shovel. 45° Dump Angle When it’s time to unload, the hydraulic system raises the bed to a 45° dump angle. That helps material slide out of the box rather than requiring you to chase it around with a skid steer, loader or shovel. Big Tex identifies the 45° dump angle as a key feature of the 25DU. Self-Contained Scissor Lift The 25DU-20 uses a self-contained scissor hydraulic system with power-up/gravity-down operation. The scissor design provides substantial lifting leverage while keeping the hydraulic system integrated into the trailer. 10,000-Lb Tandem Dual Axles Two 10,000-lb cambered axles give the 25DU-20 the axle capacity needed for its heavy-duty rating. Big Tex pairs them with oil-bath hubs and Valcrum caps, while forward self-adjusting electric brakes are standard on both axles. 8′ Slide-In Ramps This particular Old South configuration includes the 8′ slide-in ramp package. That changes the trailer from strictly a material-hauling machine into a much more versatile piece of equipment. When the job calls for moving a skid steer, compact equipment or another machine, the ramps give you a loading solution without needing a separate equipment trailer. When you don’t need them, the ramps can be stored rather than permanently occupying the rear of the trailer. Equipment-Ready Cargo Control Big Tex equips the 25DU with four 5/8″ D-rings, J-hooks, stake pockets and a complete breakaway system. The D-rings are positioned inside the bed for securing equipment, while the additional cargo-control points provide more options for securing loads appropriately. 12,000-Lb Drop-Leg Jacks Dual 12,000-lb side-wind drop-leg jacks provide substantial support when connecting and disconnecting the gooseneck. They’re built for a trailer that spends its working life carrying serious weight. Heavy-Duty 30,000-Lb Adjustable Suspension The 25DU uses a 30,000-lb heavy-duty adjustable suspension designed for demanding hauling applications. That gives the trailer a stout foundation underneath the dump box and helps it handle the kind of loads this class of trailer was built to carry. Tarp Shroud The formed tarp shroud is standard equipment. The actual roll tarp is and available option. Big Tex lists both a crank-style roll tarp and an industrial roll tarp with side flaps as available options. So if your Old South unit actually has the tarp installed, advertise the tarp. If it doesn’t, don’t let the pictures accidentally promise something the customer isn’t getting. Dual Tires The 25DU-20 uses ST235/80R16 Load Range E radial tires in a dual-wheel configuration. The dual-wheel setup provides the foundation needed for a heavy-duty tandem dual dump trailer, while Big Tex also offers a 17.5″ tire upgrade that includes a spare. Who Is the Big Tex 25DU-20 For? The 25DU-20 is built for customers who need a serious dump trailer rather than a light-duty material hauler. It’s particularly well suited for: Excavating contractors Site-work contractors Grading contractors Demolition contractors Landscaping companies Concrete contractors General contractors Construction companies Property-development crews Heavy equipment operators Municipal and commercial maintenance Aggregate and material hauling And because this particular configuration includes the 8′ slide-in ramps, it’s also a strong choice for contractors who need one trailer that can move both material and equipment. Frequently Asked Questions How much can the Big Tex 25DU-20 carry? Big Tex currently lists the 25DU-20 at 25,000 lbs GVWR, 8,500 lbs factory empty weight and 16,500 lbs factory cargo capacity. Always verify the actual trailer’s certification label before loading. How much material can the 25DU-20 hold? Big Tex’s current dump-trailer application guide lists the 25DU-20 at approximately 20.5 cubic yards of standard volume. Actual usable volume depends on how the material is loaded and the material’s characteristics. Does this 25DU-20 include ramps? Yes. This Old South configuration includes the 8′ slide-in ramp package. Big Tex lists the 8′ slide-in ramp package as an available option on the 25DU, and the specific trailer configuration being described here is equipped with it. Does the 25DU-20 come with a tarp? The formed tarp shroud is standard, but the actual roll tarp is an option. Big Tex lists crank-style and industrial roll-tarp systems as available options. Verify the actual tarp equipment on the trailer before advertising it as included. What size are the sides? The 25DU-20 has 48″ tall, 12-gauge sides with formed channel supports. What size are the axles? The 25DU-20 uses two 10,000-lb cambered axles with oil-bath hubs and Valcrum caps. What kind of brakes does it have? Forward self-adjusting electric brakes are standard on both axles. What is the dump angle? The 25DU-20 has a 45° dump angle. What type of hitch does it use? The 25DU-20 is a gooseneck trailer with a square adjustable crank 2-5/16″ gooseneck coupler. Can I use the 25DU-20 to haul equipment? Yes. The installed 8′ slide-in ramps make this configuration particularly useful for loading equipment, while the dump body handles material-hauling duties. Always confirm that the equipment’s weight, dimensions and loading method are appropriate for the trailer’s ratings. Safety & Cargo Securement Before loading, verify the combined weight of the trailer and cargo against the trailer’s GVWR and axle ratings. Material density can vary considerably, so do not assume that a full dump box is automatically within the trailer’s weight rating. When hauling equipment with the ramps, secure the equipment with properly rated tie-downs at the manufacturer’s recommended attachment points. Inspect the coupler, safety chains, tires, brakes, hydraulic system, ramps and lights before every trip. To cross-verify that your trailer configuration conforms to modern cargo security standards, review the safety regulations listed on the NATM Website. If you are looking to cross-shop this trailer with other configurations in our active inventory lot, feel free to browse our full catalog of trailers for sale right here on our digital showroom. Video · Dump Trailer