Running out of fuel on a long haul or remote work site is more than an inconvenience. Saddle fuel tanks let truck owners carry extra diesel or gasoline without sacrificing bed space, fitting neatly in the saddle area between the cab and the truck bed or beneath the frame rails. Whether you drive a heavy-duty pickup, a flatbed, or a work truck that spends days far from a fuel station, these tanks can dramatically extend your range and reduce costly downtime.
We researched and compared the top saddle fuel tanks available on Amazon, evaluating build material, capacity, certifications, transfer pump options, and how well each product fits common truck configurations. From budget aluminum options to premium DOT-certified solutions, this guide breaks down the six best choices so you can find the right fit for your rig and your work demands.
| Photo | Product | Score | Buy |
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Transfer Flow 080-01-13901 Replacement Fuel Tank Best Overall 50-gallon capacity, CARB and EPA compliant, crosslinked polyethylene construction |
9.1 | 🛒 Check Price |
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RDS Aluminum Products 71088 Combination Tank Toolbox Best Aluminum Build 60-gallon auxiliary fuel tank with integrated toolbox, diamond-plate aluminum |
8.7 | 🛒 Check Price |
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Dee Zee DZ91741 Fuel Transfer Tank Best for Pickups 40-gallon aluminum transfer tank, 12V pump included, saddle-style mount |
8.4 | 🛒 Check Price |
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Better Built 29224199 Steel Transfer Fuel Tank Best Budget Steel 35-gallon steel construction, low-profile saddle design, manual pump compatible |
7.9 | 🛒 Check Price |
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Tradesman Fuel Tools TF-1010 Aluminum Saddle Tank Best Lightweight Option 50-gallon aluminum saddle tank, lightweight build, universal fitment design |
8.0 | 🛒 Check Price |
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Fuel Transfer Tank by JohnDow Industries JDI-TT50AL Best Pump Package 50-gallon aluminum tank with 20 GPM 12V pump and nozzle kit |
7.5 | 🛒 Check Price |
1. Transfer Flow 080-01-13901 Replacement Fuel Tank: Best Overall
Transfer Flow is widely regarded as the benchmark in auxiliary and replacement fuel tanks, and the 080-01-13901 lives up to that reputation. The crosslinked polyethylene shell resists the corrosion that plagues steel tanks in northern climates, and the CARB and EPA certifications mean fleet managers do not have to worry about compliance headaches. The saddle-style fitment is engineered for specific truck models, so buyers need to confirm compatibility before ordering, which can be a sticking point if your truck has a non-standard setup.
In the premium tier, this tank justifies the investment for anyone who relies on their truck daily. The optional in-tank pump upgrade is worth considering for a clean, factory-style installation. That said, the higher price and model-specific fitment make it less appealing for hobbyists or owners of older trucks with limited aftermarket support.
- DOT, CARB, and EPA certified for legal road use in all 50 states
- Crosslinked polyethylene resists corrosion and dents better than thin steel
- Available with optional in-tank fuel pump for smooth factory-style integration
Pros: Full regulatory compliance removes legal guesswork for work truck fleets; Durable poly construction holds up in harsh weather and rough terrain
Cons: Premium pricing puts it out of reach for casual or infrequent users
2. RDS Aluminum Products 71088 Combination Tank Toolbox: Best Aluminum Build
The RDS 71088 is a popular choice for contractors and tradespeople who need both extra fuel and secure storage on the same platform. The diamond-plate aluminum finish looks sharp on work trucks, and the combo design genuinely delivers on its promise by giving you a 60-gallon reserve and a lockable toolbox in one footprint. Installation is straightforward for anyone comfortable with basic hand tools, though fitting the fuel lines neatly takes some patience.
The main trade-off is that aluminum dents more easily than steel if heavy gear gets tossed onto it, so users who are rough on their equipment may find surface damage over time. At a mid-range price point, it represents solid value for tradespeople who want maximum utility from every inch of their truck bed.
- Diamond-plate aluminum construction for a rugged, professional look
- Integrated toolbox adds utility without taking up extra bed space
- Transfer pump included for easy refueling directly from the tank
Pros: Dual-purpose design saves space and money compared to buying a tank and toolbox separately; Aluminum body is lightweight and naturally corrosion resistant
Cons: Aluminum is softer than steel and can dent if heavy objects are dropped on it
3. Dee Zee DZ91741 Fuel Transfer Tank: Best for Pickups
Dee Zee has built a solid reputation in truck accessories, and the DZ91741 carries that reputation into the auxiliary tank segment. The Brite-Tread aluminum finish holds up well against road debris and weather, and the included 12V pump means you can start using the tank immediately after installation. The 40-gallon capacity is a sweet spot for pickup owners who want meaningful range extension without overloading their suspension.
Where this tank falls slightly short is pump performance. At 15 GPM, it is adequate for topping off equipment in the field but feels slow if you are trying to fill a large machine quickly. For most pickup truck owners who use this for personal range extension, that limitation rarely matters. This sits comfortably in the mid-range tier and is one of the more approachable options in this category.
- 12V transfer pump delivers up to 15 GPM for quick refueling
- Brite-Tread aluminum resists corrosion and scratches in daily use
- Saddle profile fits most full-size pickup beds without modification
Pros: Included pump adds immediate usability right out of the box; Competitive mid-range pricing makes it accessible for small fleets and individual owners
Cons: Pump flow rate is slower than premium units, which can be frustrating for high-volume users
4. Better Built 29224199 Steel Transfer Fuel Tank: Best Budget Steel
Better Built targets the budget segment and delivers a respectable steel saddle tank for the price. The powder-coated finish provides a reasonable barrier against surface rust, and the low-profile design is a genuine differentiator for owners who prioritize a clean look or frequently drive under low-clearance structures. At 35 gallons, it adds meaningful range without being excessive for lighter-duty needs.
The biggest drawback is the lack of an included pump. For buyers already owning a 12V transfer pump, this is a non-issue, but first-time buyers should factor in the added cost. The steel construction is heavier than aluminum alternatives, which can reduce payload capacity on trucks already carrying gear. Still, for the budget tier, it is a dependable choice for occasional field use.
- Heavy-gauge steel construction at a budget-friendly price point
- Low-profile saddle shape preserves sightlines and aerodynamics
- Powder-coated finish resists rust for extended outdoor storage
Pros: Most affordable entry point for a steel saddle tank with decent build quality; Low profile design integrates cleanly without adding bulk
Cons: No pump included, so buyers must budget for a separate transfer pump
5. Tradesman Fuel Tools TF-1010 Aluminum Saddle Tank: Best Lightweight Option
Tradesman Fuel Tools positions the TF-1010 as a flexible solution for truck owners who may switch vehicles or want one tank that fits multiple applications. The aluminum build keeps the weight penalty modest compared to steel alternatives, which matters if you are already hauling heavy cargo. The smooth exterior is also easier to keep clean than textured diamond-plate surfaces in environments with fuel spills or chemical exposure.
The compromise with universal fitment tanks is installation complexity. Some owners report needing additional mounting straps or brackets to achieve a rattle-free, fully secure fit, which adds time and minor cost to the setup. For anyone willing to do a careful installation, this mid-range tank is a multi-purpose performer with good capacity for its weight class.
- Lightweight aluminum reduces added weight penalty on payload-sensitive trucks
- Universal saddle design fits a broad selection of full-size and heavy-duty truck beds
- Smooth exterior finish is easy to clean and resists chemical staining
Pros: Universal fit means fewer compatibility worries compared to model-specific tanks; Lightweight construction helps preserve truck payload and fuel economy
Cons: Universal fitment can require additional hardware or strapping for a fully secure install
6. Fuel Transfer Tank by JohnDow Industries JDI-TT50AL: Best Pump Package
JohnDow Industries is less widely known than the category leaders, but the JDI-TT50AL earns attention for packing a genuinely high-flow 20 GPM pump into an all-in-one kit at a mid-range price. For farmers, landscapers, and contractors who need to refuel equipment quickly in the field, the faster pump rate is a practical advantage over budget kits that trickle fuel at 10 to 15 GPM. The included nozzle and hose mean you can be operational shortly after installation without hunting for compatible accessories.
The main hesitation with this brand is the thinner aftermarket support network. Replacement parts and warranty service are less straightforward to access compared to Transfer Flow or Dee Zee. Buyers who prioritize long-term serviceability may prefer a more established name, but for those focused on up-front value and fast-flow performance, this kit punches above its weight in the mid-range bracket.
- 20 GPM high-flow pump included for fast field refueling of equipment
- Complete kit includes nozzle, hose, and fittings for immediate deployment
- Aluminum construction keeps weight manageable for smaller trucks
Pros: High-flow pump is the fastest included pump in this comparison; All-in-one kit reduces the hassle of sourcing compatible accessories separately
Cons: Brand recognition is lower than Transfer Flow or Dee Zee, which makes some buyers hesitant on long-term support
Frequently Asked Questions
Are saddle fuel tanks legal to use on public roads?
Legality depends on the tank’s certifications and your location. In the United States, auxiliary fuel tanks used on public roads must comply with EPA and, in California, CARB regulations. Tanks certified by the manufacturer as DOT, EPA, and CARB compliant are street legal in all 50 states. Tanks sold only as off-road or farm use units should not be used for on-highway driving. Always confirm the certification status of a tank before purchasing if you plan to use your truck on public roads.
What is the difference between a saddle tank and a standard transfer tank?
A saddle tank is designed to sit in the space between the cab and the truck bed, or to straddle the frame rails, taking up minimal bed space. A standard transfer tank typically sits flat in the truck bed and takes up more cargo room. Saddle tanks are preferred when you need to preserve bed space for cargo while still adding fuel capacity. Transfer tanks tend to offer more flexibility in placement but reduce your available hauling area.
How do I know which saddle tank fits my truck?
Fitment depends on your truck’s make, model, year, and bed configuration. Some tanks, like those from Transfer Flow, are engineered for specific vehicle applications and require you to select your exact truck at the time of purchase. Universal-fit tanks work across a wider range of trucks but may require additional hardware for a secure mount. Always check the manufacturer’s compatibility chart and measure the saddle area of your truck bed before ordering to avoid costly returns.
Do I need a professional to install a saddle fuel tank?
Many saddle tanks are designed for owner installation with basic hand tools, and the majority of buyers complete the job themselves over a few hours. However, if the tank connects to the truck’s fuel system rather than functioning as a stand-alone transfer tank, professional installation is recommended to avoid fuel leaks, electrical issues, or warranty problems. Always follow the manufacturer’s installation guide and local fire and fuel safety codes during the process.
Aluminum vs steel saddle tank: which should I choose?
Aluminum tanks are lighter, naturally corrosion resistant, and easier to keep clean, making them a strong choice for most users. Steel tanks are heavier but can be more resistant to punctures and impact damage from debris on rough terrain. If weight savings and corrosion resistance are priorities, aluminum is the better choice for the majority of truck owners. If your truck works in extremely rough conditions with heavy physical contact risk to the tank, a heavier-gauge steel option may hold up better over time.
Our Verdict
After researching and comparing the leading saddle fuel tanks for trucks, the Transfer Flow 080-01-13901 is our top pick for anyone who needs a compliant, long-lasting solution backed by a trusted name in the category. Its regulatory certifications, durable poly construction, and optional in-tank pump make it the most complete package in the premium tier. For buyers who want aluminum build quality and a practical combo design at a mid-range price, the RDS Aluminum Products 71088 Combination Tank Toolbox is the standout runner-up, delivering storage and fuel capacity in one package without a significant weight penalty.
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