Choosing the right fuel tank for a truck bed involves balancing capacity, durability, security, and ease of installation. This guide highlights five well-regarded options that fit a range of truck bed setups—from compact auxiliary tanks to sizable 58-gallon systems—so you can compare features side by side and pick the best match for your needs.
| Product | Brand | Capacity | Key Benefit |
|---|---|---|---|
| Better Built 36-Gallon Tank | Better Built | 36 gallons | Built-in baffles and auto shutoff reduce spill risk |
| RDS MFG 45 Gallon Tank | RDS MFG INC | 45 gallons | Fully welded seams for durability |
| VEVOR 58 Gallon Portable Tank | VEVOR | 58 gallons | 10 GPM flow, lockable lid, dual filters for clean fuel |
| Spectra Premium GM23B Tank | Spectra Premium | Varies by model | OE-fit design with corrosion-resistant steel |
| RDS MFG 60-Gallon Tank | RDS MFG INC | 60 gallons | Top-siphon capable with electric pump compatibility |
Whether your aim is under-bed relocation, auxiliary fueling, or long-haul range, these products present a spectrum of capacities and build styles. The following sections break down each option, highlighting what makes it a strong choice for truck bed setups.
Better Built 36-Gallon Transfer Tank
The Better Built 36-Gallon Steel Transfer Tank offers a compact yet ample capacity for auxiliary fueling in trucks with limited bed space. Its 36-gallon size makes it a practical choice for extending range without overburdening the chassis. A notable feature is the auto shutoff at the pump, designed to prevent spills during refueling, which enhances safety and reduces waste. Built-in baffles strengthen the tank and help prevent fuel sloshing during transport, aiding vehicle control and reducing splash-back when cornering. The steel construction provides durability in harsh work environments.
Key considerations: fitment in tight spaces, spill prevention, and the reinforcement provided by baffles. For owners needing a mid-size, durable secondary tank, this model balances capacity with manageability. As with all stationary or semi-permanent tanks, proper mounting and venting are essential to ensure safe operation and compliance with vehicle standards.
RDS MFG INC 45 Gallon Rectangular Tank
RDS MFG INC offers a 45-gallon rectangular auxiliary tank designed to be compatible with a variety of truck bed configurations. The manufacturer notes a full range of tank options in various capacities and dimensions, which makes this brand a versatile choice for custom builds. This model supports gasoline auxiliary fueling when siphoned from the top using an electric pump, and it features fully welded seams for durability. The design emphasizes reliable sealing and structural integrity under typical road conditions, making it a practical option for professional and enthusiast setups alike.
Key considerations: compatibility with your truck’s bed geometry, welding quality, and ease of installation. The 45-gallon size sits between smaller under-bed relocations and larger portable tank concepts, which can help optimize payload balance and fuel capacity without sacrificing storage space or handling. As with any tank system, ensure proper venting and mounting hardware for long-term reliability.
VEVOR 58 Gallon Portable Diesel Tank
The VEVOR 58-Gallon Portable Diesel Tank is designed for versatility and mobility. Its polyethylene construction provides resistance to weather and UV exposure, while a lockable upper lid helps deter theft and maintain security during transport. The 6mm minimum thickness and up to 12mm thick areas contribute to durability in demanding environments. A 12V electric transfer pump delivers up to approximately 10.6 GPM, supported by a mechanical gauge to monitor diesel levels in real time. The tank also includes a duplex filtration system to remove larger and smaller impurities, increasing fuel quality for engine performance.
Key considerations: portability versus fixed mounting, fuel type compatibility, and filtration quality. This option suits users who need a mobile fueling solution—such as contractors or off-road enthusiasts—who may relocate a fuel source between jobs or vehicles. For long-term vehicle integration, verify fit alongside existing storage and ensure the locking lid mechanism is compatible with security needs on and off-site.
Spectra Premium GM23B Fuel Tank
The Spectra Premium GM23B fuel tank is designed to fit OE specifications, leveraging engineering expertise from OE fuel system design. The tank includes a lock ring to reduce installation time and ensure a secure repair. Crafted from corrosion-resistant Ni-Terni steel, it emphasizes durability and longevity in demanding environments. The OE-fit approach helps simplify replacement in applications that prioritize factory-style performance and compatibility with existing components.
Key considerations: factory-fit alignment, corrosion resistance, and ease of installation. For vehicle owners seeking a seamless upgrade that preserves original performance characteristics, this model offers a reliable match to many factory systems. Verify compatibility with your vehicle’s generation and fuel system layout to avoid installation challenges.
RDS MFG INC 72771 Fuel Tank
The RDS MFG INC 72771 adds another option for exterior mounting with a focus on practical features. The tank includes a locking automotive-style fill cap, designed to enhance security and reduce fuel loss. It is intended for exterior areas, and the aluminum construction helps resist corrosion. This model is well-suited for fleets or individuals seeking a robust, long-lasting tank to withstand outdoor exposure and regular use in varied conditions.
Key considerations: locking fill cap quality, exterior mounting fit, and material choice. Aluminum tanks resist rust, which is beneficial for outdoor storage or frequent weather exposure. Ensure the chosen size and mounting pattern align with your truck’s bed dimensions and mounting points to prevent clearance issues or interference with other components.
RDS MFG INC 60-Gallon Tank
The RDS MFG INC 60-Gallon Tank expands the range of high-capacity options for truck beds. It emphasizes versatility with its capacity to support gasoline auxiliary fueling via siphoning from the top when using an electric pump. The model is designed to fit some short-bed configurations, but potential buyers should measure carefully before ordering to ensure compatibility with their specific truck model and bed length. This tank is a practical choice for extended-range needs without choosing a larger, less maneuverable unit.
Key considerations: bed length compatibility, top-siphon usage, and pump integration. For users prioritizing maximum on-board fuel capacity within a manageable footprint, the 60-gallon option provides a substantial range while still offering feasible installation on certain short-bed trucks. Confirm mounting hardware suitability and clearance with surrounding components for a trouble-free setup.
Buying Guide: Key Purchase Considerations And Comparisons
- Capacity and weight: Larger tanks provide more fuel but add weight and may affect handling. Measure bed space and consider how the capacity aligns with typical trip ranges and payload limits.
- Mounting compatibility: Under-bed relocations differ from portable tanks. Confirm dimensions, mounting points, and whether a lid, locking mechanism, or venting is required for your application.
- Durability and materials: Steel tanks offer strength but may require more protection against corrosion; aluminum and certain plastics can resist corrosion but vary in weight and rigidity.
- Sealing and safety features: Welded seams, internal baffles, and automatic shutoff pumps reduce spill risk and improve stability during transport and refueling.
- Fuel type and pump compatibility: Ensure the tank is designed for the intended fuel (gasoline, diesel) and that an electric transfer pump or siphon method matches your workflow.
- Security: Lockable lids and locking fill caps help deter theft in vulnerable locations and when parking in public or remote areas.
- Installation complexity: Some tanks are straightforward bolt-ons; others require more extensive alterations to bed mounting, venting, or fuel line routing. Consider professional installation if needed.
- Maintenance and cleaning: Tanks with dual filters or accessible interiors ease maintenance and help maintain fuel quality, especially for long-term storage or frequent refueling.
In choosing among these options, align the tank’s capacity, mounting style, and fuel compatibility with your truck’s bed configuration and typical usage. For fleet or multi-vehicle contexts, standardized capacity options and identical mounting kits can simplify maintenance and replacements. Always consult vehicle specifications and, if uncertain, seek professional installation guidance to ensure safety and reliability.