Best Bed Mounted Fuel Tank for Pickup Trucks

#1 · Best Overall

1. Better Built Steel Transfer Tank

• Capacity: 36 gallons
• Material: Alloy Steel
• Weight: 40 lb

Best for: Work-truck steel capacity.

Why it ranks #1: Its 36-gallon alloy-steel tank includes a mounting kit with rubber bushings, built-in baffles, a lockable cap, and an overfill restriction.

The 36-gallon capacity gives this Better Built steel tank substantial onboard fuel storage, while its automatic pump shutoff helps limit spills during filling. Built-in baffles also help keep contents from shifting in transit, making it a practical option for truck owners who need a durable, secured transfer tank.

Alloy-steel construction and built-in baffles support a sturdy setup for carrying fuel, with the baffles helping stabilize contents as the truck moves. A 2-inch flush-mounted inlet and outlet provide fast flow, while the overfill restriction shuts off at the pump to help prevent spills. The vented, lockable cap adds security, and included mounting hardware with rubber bushings helps with bed installation. Its 36-gallon capacity suits regular hauling without reaching the size of the largest tanks.

Skip it if you need more than 36 gallons onboard; the Dee Zee DZ91753 offers a listed 110-gallon capacity.

Choose this Better Built tank for work-truck hauling when 36 gallons, pump shutoff, and lockable storage meet your needs. Its steel construction and listed 11-by-17-inch dimensions are relevant boundaries when planning bed space and installation.

Listed on Amazon as: Better Built Steel Transfer Fuel Tank – 36-Gallon, Rectangular, Black, Model Number 29211584

#2 · Best Steel Capacity

2. Dee Zee DZ92556NSB Transfer Tank

• Capacity: 128 liters
• Material: Alloy Steel
• Weight: 70 lb

Best for: Baffled steel bed tank.

Why it ranks #2: This 42-gallon steel tank has mounting tabs, five stability baffles, a drain plug, and a radius-curve design.

Five stability baffles distinguish this 42-gallon Dee Zee steel tank, helping stabilize liquid as it travels in the truck bed. Its 14-gauge steel construction and radius-curve design address strength and weld pressure points, while mounting tabs provide a direct way to secure the tank to the truck bed.

The 14-gauge steel body offers a heavy-duty construction, and the radius curve is specified to eliminate weld pressure points. Five stability baffles help manage movement while carrying liquid, a useful feature for a tank traveling in a moving truck. Mounting tabs secure it to the bed, while the drain plug supports draining when needed. At 59.5 inches wide and 19 inches high, the tank’s listed dimensions should be weighed against available bed space before installation.

Skip it if you want aluminum construction to avoid a steel tank; the Dee Zee DZ91753 is an aluminum alternative.

Choose the DZ92556NSB for a steel bed tank with five baffles, mounting tabs, and a drain plug. Its 59.5-inch width and 70-pound empty weight are important boundaries when planning bed fit and handling.

Listed on Amazon as: Dee Zee DZ92556NSB Transfer Tank

#3 · Highest Capacity

3. Dee Zee DZ91753 Transfer Tank

• Capacity: 110 gallons
• Material: Aluminum
• Weight: 100 lb

Best for: Maximum listed capacity.

Why it ranks #3: Its listed capacity is 110 gallons, with truck-bed mounting tabs, three stability baffles, a lockable cap, and a venting coupler.

The 110-gallon capacity is the defining advantage of this Dee Zee aluminum transfer tank, giving truck owners a much larger reserve than the other Dee Zee tank listed here. Brite-Tread aluminum is specified as non-rusting, while mounting tabs provide a way to secure the tank to the truck bed.

The 48-by-24-by-24-inch rectangular tank combines 110 gallons of capacity with heavy-gauge Brite-Tread aluminum, offering substantial storage in a clearly specified footprint. Three stability baffles help control movement during transport, and the radius-curve design eliminates key weld pressure points. A venting coupler supports venting, while the included cap and coupler complete the tank’s listed hardware. Its large dimensions and 100-pound empty weight are practical considerations for bed space and installation handling.

Skip it if you need a smaller, lighter steel tank; the Dee Zee DZ92556NSB lists 42 gallons and weighs 70 pounds.

This Dee Zee suits buyers who need very high-volume storage and can accommodate a 48-by-24-by-24-inch tank. Its 100-pound empty weight and substantial footprint make bed space and handling central fit considerations.

Listed on Amazon as: Dee Zee DZ91753 (106 gallon) Rectangle Transfer Tank – Aluminum

#4 · Largest RDS Tank

4. RDS 71083 Transfer Tank

• Capacity: 45 gallons
• Material: Aluminum
• Weight: 42 lb

Best for: Large aluminum capacity.

Why it ranks #4: This 45-gallon aluminum tank has fully welded seams and is described as non-rusting, though mounting details are not listed.

The 45-gallon capacity makes the RDS 71083 a high-volume aluminum option for truck owners who want more onboard fuel than a 37-gallon tank provides. Its fully welded seams support durability, and the aluminum construction is described as non-rusting, relevant benefits for a tank carried through changing conditions.

With 45 gallons of capacity, this rectangular tank offers a substantial reserve for transport or auxiliary fueling. RDS lists fully welded seams for durability and aluminum construction that will not rust, linking the material choice to lower concern about rust on the tank itself. Gasoline auxiliary fueling is allowed only when siphoned from the top with an electric fuel pump, so buyers should plan around that method. The supplied information does not list dimensions, making bed-space planning less specific.

Skip it if you need listed dimensions before planning installation; the RDS MFG INC 71804 specifies a 50-by-20-by-9-inch footprint.

Pick the RDS 71083 if 45 gallons and welded aluminum construction suit your hauling needs. Its gasoline auxiliary use requires an electric pump for top siphoning, and the supplied listing lacks dimensions for checking bed layout.

Listed on Amazon as: RDS MFG INC 71083 Rectangular Auxiliary/Transfer Fuel Tank – 45 Gallon Capacity

#5

5. RDS 71804 Auxiliary Tank

• Capacity: 37 gallons
• Material: Aluminum
• Weight: 77 lb

Best for: 37-gallon aluminum storage.

Why it ranks #5: The 37-gallon aluminum tank has stated dimensions of 50 by 20 by 9 inches, giving buyers useful information for checking bed fit.

A 37-gallon aluminum tank pairs substantial auxiliary fuel capacity with a listed 50-by-20-by-9-inch footprint. RDS specifies that gasoline auxiliary fueling is allowed when fuel is siphoned from the tank’s top with an electric fuel pump, giving buyers a clearly defined operating method to consider.

The aluminum construction keeps the listed tank material distinct from steel options, while the 37-gallon capacity provides a sizable reserve for truck use. Its 50-by-20-by-9-inch dimensions help buyers assess how it may occupy bed space before installation. RDS states that gasoline auxiliary fueling is permitted when siphoned from the top using an electric fuel pump; that requirement matters for choosing a compatible fueling workflow. The listing also describes diesel gravity feed from the bottom for auxiliary applications.

Skip it if you want an explicitly listed 45-gallon size; the RDS MFG INC 71083 offers that capacity.

This RDS tank suits buyers seeking 37 gallons of aluminum auxiliary storage who can accommodate its 50-by-20-by-9-inch dimensions. For gasoline auxiliary use, the specified electric-pump top-siphon method is an important operating boundary.

Listed on Amazon as: RDS MFG INC Auxiliary Fuel Tank 37Gal – 71804

#6 · Toolbox Combination

6. RDS 72548 Toolbox Combo

• Capacity: 60 gallons
• Material: Alloy Steel, Aluminum, Stainless Steel
• Weight: 16 oz

Best for: Fuel and toolbox combination.

Why it ranks #6: This 60-gallon truck-compatible transfer and auxiliary tank combines fuel storage with a toolbox, with dimensions listed as 55 by 20 by 19.5 inches.

A 60-gallon capacity is combined with a toolbox in this RDS truck-bed unit, joining fuel storage with a place to keep tools. Its listed 55-by-20-by-19.5-inch dimensions help buyers evaluate the space commitment, while the mixed alloy-steel, aluminum, and stainless-steel material listing distinguishes its construction.

The combination of a fuel transfer tank and toolbox can consolidate two truck-bed functions in one unit, while the 60-gallon capacity provides a substantial fuel reserve. RDS describes auxiliary tanks as connecting to a vehicle’s fuel tank and says diesel can gravity-feed from the bottom; an optional diesel install kit is also mentioned in the supplied description. The listed 55-by-20-by-19.5-inch dimensions are useful for layout planning, though the unusual listed weight of 16 ounces warrants careful verification before handling plans.

Skip it if you need a standalone tank without a toolbox; the RDS MFG INC 74596 combines a transfer tank with a storage box differently.

Consider this RDS combo if you want fuel storage and toolbox function together in a truck bed. Its 60-gallon capacity and listed dimensions call for space planning, and the supplied weight entry is an important uncertainty.

Listed on Amazon as: RDS MFG INC – 72548 Fuel Transfer Tank/Auxiliary Fuel Tank/Toolbox Combo – 60 Gallon

#7

7. RDS 74596 Auxiliary Tank

• Material: Aluminum
• Weight: 70 lb

Best for: Diesel equipment transfer.

Why it ranks #7: Designed to transfer diesel and other nonflammable liquids from a pickup bed, it has aluminum mounting brackets and a storage box on top.

This RDS aluminum unit combines a transfer tank with a storage box on top, serving pickup owners moving diesel or other nonflammable liquids to remote or heavy equipment. Fully welded seams and heavy-duty aluminum mounting brackets support the listed transfer use, while its 48-by-17-by-8-inch dimensions inform bed-space planning.

The stated use is transferring diesel and other nonflammable liquids from a pickup bed to remote or heavy equipment, so it addresses a specific refueling workflow. Its tank-and-storage-box combination adds a storage function above the tank, and fully welded seams provide a construction detail relevant to durability. Heavy-duty aluminum mounting brackets support attachment in the bed. The listed dimensions are 48 by 17 by 8 inches; no capacity is supplied, so buyers cannot compare its fuel volume from the provided specifications.

Skip it if you need a stated gallon capacity to compare fuel volume; the Dee Zee DZ92556NSB lists 42 gallons.

This RDS unit suits pickup owners transferring diesel or other nonflammable liquids to equipment who also value a top storage box. Its listed dimensions help with layout, but the unspecified capacity limits volume comparisons.

Listed on Amazon as: RDS Tanks 74596 Auxiliary Fuel Tank

#8

8. Landrol 58-Gallon Tank

• Capacity: 58 gallons
• Material: Aluminum

Best for: High-capacity truck storage.

Why it ranks #8: Its 58-gallon aluminum tank lists mounting brackets, straps, and dimensions, but the seller states that it is not DOT certified.

A 58-gallon capacity gives the Landrol tank ample listed volume for transportation-truck fuel storage, while its sending unit connects to a fuel gauge to help monitor remaining contents. The 59-by-13-by-17-inch dimensions also provide concrete measurements for assessing bed layout before installation.

The aluminum tank combines a 58-gallon capacity with manual-welded joints and reinforcing covers, which the listing associates with strength. A sending unit connects to a fuel gauge, letting the operator check remaining capacity rather than relying only on an estimate. Fully welded mounting brackets support installation on a truck, and two straps make removal more convenient when the tank needs to come off the vehicle. However, the listing explicitly says the tank is not DOT certified, a key transportation consideration.

Skip it if you require a DOT-certified tank; the supplied listing does not identify another certified option in this roundup.

This Landrol tank fits buyers prioritizing 58 gallons, gauge-connected monitoring, and removable truck-bed storage. Its stated non-DOT-certified status is a decisive boundary for anyone whose transport or use requirements call for DOT certification.

Listed on Amazon as: 58 Gallon Aluminum Fuel Cell Tank Rectangular Transfer Fuel Tank Auxiliary Diesel Storage for Transportation Truck