6 Best RV Base Plate Adapters For Secure Towing

Flat towing a dinghy vehicle behind a motorhome offers unparalleled freedom once you reach your destination, but the connection between the two vehicles must be absolutely bulletproof. When mixing and matching tow bars and base plates from different manufacturers, a high-quality adapter is the single point of failure that cannot be compromised. Choosing the correct adapter ensures a secure link, preventing catastrophic towing failures on the highway while saving you from buying an entirely new towing setup.

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Blue Ox BX88185: Best for Roadmaster Tow Bars

If you own a premium Roadmaster tow bar but your towed vehicle is outfitted with a Blue Ox base plate, this adapter is the gold standard for bridging the brand gap. It eliminates the need to replace expensive towing components by converting the triple-lug connection of the Roadmaster to fit the double-lug receiver of Blue Ox. The steel construction ensures that structural integrity is maintained across the entire tow assembly.

The fitment is incredibly tight, which is crucial for preventing the deadly “slop” or play that can cause swaying at highway speeds. Some users might find the initial pin alignment slightly stubborn during the first few hookups, but this close tolerance is actually a safety benefit rather than a defect. It ensures that force is distributed evenly across the frame.

This adapter is ideal for RVers who upgraded their towed vehicle but kept their trusted Roadmaster tow bar. Choose the Blue Ox BX88185 if you want a zero-compromise connection that retains the full weight capacity of your existing Roadmaster setup. If your towing components are mismatched between these two leading brands, this is your definitive solution.

Roadmaster 039: Best for Blue Ox Base Plates

Navigating the hardware differences between a Roadmaster base plate and a Blue Ox tow bar can be a headache, but the Roadmaster 039 simplifies the equation. This robust adapter allows a Blue Ox tow bar to latch securely onto Roadmaster classic-style base plates. It provides a clean, heavy-duty link that handles the heavy lateral forces experienced during tight turns.

A key benefit of this design is its simplicity, utilizing high-grade steel pins and clips that resist road grime and corrosion. The downside to consider is that this adapter does not fit Roadmaster EZ, EZ2, or MX style base plates, meaning you must verify your exact base plate model before purchasing. This limitation requires a quick inspection of your vehicle’s front-end setup to avoid ordering mistakes.

For those running a classic Roadmaster base plate who prefer the ease of use of a Blue Ox tow bar, this adapter is unmatched. The Roadmaster 039 is the perfect fit if you need to salvage an older, dependable base plate setup without compromising on a modern tow bar. It is a durable, targeted solution that does exactly what it promises.

Demco 9518010: Best for Demco to Blue Ox

Demco tow bars are highly regarded for their self-aligning features, but mating them to a Blue Ox base plate requires a specialized adapter. The Demco 9518010 serves this exact purpose, converting the tow bar end to seamlessly integrate with Blue Ox’s tab system. The engineering behind this kit focuses on minimizing play, which protects both the tow bar and the base plate from premature wear.

The kit includes high-tensile hardware that can withstand the jarring impacts of pothole-ridden roads. The tradeoff is that the installation requires a bit of mechanical patience, as you must swap out the existing ends on your Demco tow bar. This is a semi-permanent modification, meaning you will not want to switch back and forth between different vehicles frequently.

If your towing setup relies on a Demco tow bar and a Blue Ox base plate, this adapter is non-negotiable. The Demco 9518010 is the ultimate choice for RVers who demand a rock-solid, rattle-free connection between Demco and Blue Ox hardware. It ensures your towing geometry remains perfect over thousands of miles.

Curt 70002: Best Budget-Friendly Adapter Kit

Towing accessories can quickly drain your road-trip budget, making the Curt 70002 an incredibly attractive option for cost-conscious travelers. This budget-friendly adapter kit allows a Curt tow bar to connect to standard Blue Ox or Roadmaster base plates, offering surprising versatility for its price point. It proves that safety and security do not always have to come with a premium price tag.

While the price is accessible, Curt does not skimp on the structural steel or the powder-coated finish, which prevents rust in damp environments. However, the budget price does mean fewer convenience features, such as quick-release mechanisms or integrated pin storage. It is a straightforward, utilitarian piece of hardware that requires manual alignment and secure pinning every time.

If you are setting up a secondary towed vehicle or need a reliable backup adapter for your emergency kit, this is the one to get. The Curt 70002 is the best option for budget-conscious RVers who refuse to compromise on structural safety. It delivers basic, robust performance without any unnecessary bells and whistles.

Roadmaster 031: Best for Tracker Tow Bars

Tracker tow bars are highly popular among off-road enthusiasts and those towing lighter utility vehicles, but connecting them to a standard Roadmaster base plate requires specific hardware. The Roadmaster 031 adapter bridges this gap with a heavy-duty design that matches the rugged nature of tracker setups. It ensures that the pivot points align perfectly, preventing binding when driving over uneven terrain.

The adapter’s compact footprint means it does not add unnecessary length to your towing setup, keeping the towed vehicle tracking tightly behind the RV. One potential drawback is its specificity; it will not work with most other standard tow bar brands, limiting its usefulness if you plan to upgrade your tow bar later. It is highly specialized hardware designed for a specific towing niche.

For those towing a jeep or lightweight tracker vehicle with a dedicated tracker bar, this adapter offers peace of mind. Invest in the Roadmaster 031 if you need a durable, specialized link for your tracker-style towing system. It provides the heavy-duty reliability required for both highway transit and trail-head transitions.

Demco 9518286: Best for Blue Ox Tow Bars

When your RV is equipped with a premium Blue Ox tow bar but your towed vehicle features a Demco base plate, the Demco 9518286 is the adapter you need. This kit converts the clevis ends of your Blue Ox tow bar to fit the tab spacing of a Demco base plate. It maintains the critical alignment necessary for the self-locking arms of the tow bar to function correctly.

The engineering of this adapter is focused on smooth rotation, ensuring that your towed vehicle can negotiate sharp turns without binding the hitch assembly. The installation is highly secure, but it does require removing the original Blue Ox clevis ends, which can be difficult without the right tools. It is best suited for those who intend to keep this vehicle-and-tow-bar combination for the long haul.

This adapter is a must-have for anyone looking to pair the convenience of a Blue Ox tow bar with a Demco base plate. The Demco 9518286 is the premier choice for maintaining the sophisticated features of your Blue Ox tow bar on a Demco foundation. It is an investment in smooth, predictable towing performance.

How to Match Your Tow Bar and Base Plate

Matching a tow bar to a base plate from a different manufacturer requires careful attention to the physical connection points, known as ears or lugs. Standard tow bars typically use either a double-lug or triple-lug design, which must interlock perfectly with the base plate’s receiving tabs. Attempting to force a mismatch or using makeshift hardware can lead to metal fatigue and catastrophic failure under tow loads.

To make an accurate match, several physical dimensions and specifications must be analyzed:

• Lug Configuration: Match a double-lug bar to a double-lug receiver, or use an adapter designed specifically to convert them.
• Tab Spacing: Measure the precise distance between the mounting tabs on the base plate to avoid binding.
• Pin Diameter: Ensure the adapter’s pins match the receiver holes to prevent dangerous play or rattling.

Weight ratings are another non-negotiable factor when matching these components. An adapter is only as strong as its lowest-rated component, meaning a 10,000-pound tow bar paired with a 5,000-pound adapter can only safely tow 5,000 pounds. Always verify that the adapter’s weight rating meets or exceeds both the weight of your towed vehicle and the capacity of your tow bar.

Step-by-Step Installation Safety Tips

Safety during installation begins with parking both the RV and the towed vehicle on a flat, level surface. Ensure both park brakes are engaged before attempting to align the towing components to prevent accidental rolling. Once positioned, dry-fit the adapter to both the tow bar and the base plate to confirm that all holes align without forcing the pins.

When assembling the adapter, always use the high-tensile bolts, lock washers, and nylon-insert lock nuts provided by the manufacturer. Apply a medium-strength thread locker to the bolt threads to prevent them from backing out due to road vibrations. Use a calibrated torque wrench to tighten all fasteners to the exact foot-pound specifications detailed in the installation manual.

After securing the main bolts, insert the safety pins and lynchpins through the towing ears, ensuring the wire loops snap securely over the pin ends. Double-check that the safety cables are routed correctly, crossing under the coupler to catch the tow bar in the event of a connection failure. Perform a visual walk-around and a low-speed pull test before hitting the open highway.

Key Features of a Reliable Towing Adapter

A reliable towing adapter must be constructed from high-grade, structural steel to withstand the immense dynamic forces of flat towing. Look for adapters that feature a durable powder-coated or zinc-plated finish, which protects the raw steel from road salt, moisture, and debris. Any signs of cheap welding or thin metal should be an immediate red flag when choosing this critical link.

High-quality models generally offer specific design characteristics that guarantee safety and ease of use:

• High-tensile steel fasteners: To prevent shear failure under heavy braking.
• Self-locking pins: To ensure that road vibrations cannot shake the connection loose.
• Corrosion-resistant finishes: To prolong the service life of the adapter in coastal or winter climates.

Finally, clear and certified weight ratings are essential for any adapter you trust behind your motorhome. Reliable manufacturers subject their adapters to rigorous stress testing and prominently display the Gross Vehicle Weight Rating (GVWR) on the product. Never use an unrated or custom-fabricated adapter, as the risks to road safety are simply too high.

How to Inspect and Maintain Your Adapter

Routine maintenance is the key to longevity and safety when it comes to towing adapters. Before every trip, inspect the adapter for hairline cracks, bent ears, or elongated pin holes, which indicate metal fatigue. Pay close attention to the welds and the areas around the bolt holes, as these are the most common points of stress concentration.

Keep the adapter clean by washing away road grime, salt, and mud after each journey, as these contaminants can accelerate rust and bind the moving parts. Lubricate the pivot pins and moving joints with a high-quality dry silicone spray rather than grease, which can attract dirt and create an abrasive paste. Store the adapter in a dry, protected area when it is not in use to prevent environmental degradation.

Replace any worn or damaged hardware immediately, using only grade-8 replacement bolts and manufacturer-approved safety pins. Never attempt to weld or straighten a bent adapter, as heating or bending the steel permanently compromises its structural strength. A proactive approach to inspection ensures that minor wear is addressed before it can escalate into a dangerous highway emergency.

Finding the perfect match between your tow bar and base plate does not have to mean buying an entirely new system. By choosing a high-quality, properly rated adapter and maintaining it diligently, you can enjoy the freedom of flat towing with absolute confidence. Safe travels begin with a secure connection, allowing you to focus on the road ahead and the adventures that await at your next destination.