You may know what your towing equipment does without knowing its brand, model, or weight rating. That’s common when you buy a used motorhome, truck, travel trailer, or complete towing setup.
Start by determining whether you have a tow bar or a weight distribution system. They serve different purposes and have different components, so identifying which one you have is the first step. Once you know which type of equipment you have, a few labels and physical details can usually help you identify the exact system.
First, Confirm Which Type of Towing Equipment You Have
You probably have a tow bar if:
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It connects the back of a motorhome to the front of a passenger vehicle
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It has two arms that extend toward the towed vehicle
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The arms connect to the baseplate attachment points or removable tabs
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Safety cables and an electrical cable run between the motorhome and the vehicle
You probably have a weight distribution system if:
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It connects a truck or SUV to a travel trailer or other bumper-pull trailer
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The trailer coupler sits on a hitch ball
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One or two spring bars extend from the hitch head toward the trailer frame
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Brackets, chains, or latches connect the spring bars to the trailer
A standard ball mount without spring bars isn't a weight distribution system. If you don't see spring bars connected to the hitch head, you're most likely looking at a standard ball mount rather than a weight distribution setup.
How to Identify Your Current Tow Bar
The quickest way to identify a tow bar is to find its manufacturer's label or stamped model information.
Check the Tow Bar Arms
Inspect both arms closely. Look near:
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The pivot points
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The locking handles or release levers
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The center body
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The receiver connection
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The ends that attach to the towed vehicle
You may find a metal tag, a sticker, an etched number, or a stamped model name. Carefully wipe away road dirt with a damp cloth so you can read the markings without removing the label. Blue Ox product labels can be found on the underside of the driver's side leg.
Record every number you find. A model number, serial number, or partial part number can be more useful than the color or general shape of the tow bar.
Determine Where the Tow Bar Is Stored
Most RV flat-towing tow bars fall into one of two broad mounting styles. An RV-mounted tow bar slides into the motorhome’s receiver and normally stays at the rear of the RV when disconnected. Its arms fold together for storage.
A vehicle-mounted tow bar remains attached to the front of the towed vehicle when it isn’t connected to the motorhome.
You can compare your setup with RV-mounted tow bars and vehicle-mounted tow bars to see which configuration matches.
Look at the Arm Design and Release System
The arm and latch design can help distinguish one model from another. Check whether the arms are:
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Straight or offset
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Round or square
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Painted steel or aluminum
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Equipped with handles, levers, or rotating release mechanisms
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Covered by rubber boots near the inner arms
Don’t identify a tow bar by appearance alone. Different models can look similar, and replacement components may have been installed over time.
Inspect the Baseplate Connections
The connection at the front of the towed vehicle can provide another clue. Look for removable attachment tabs, crossbars, adapters, clevises, or pins.
Adapters can allow equipment from different product families to work together, so the baseplate brand doesn’t automatically confirm the tow bar model. Identify the tow bar and baseplate separately before ordering parts.
Check the Paperwork From the Previous Owner
A manual or receipt may show the complete model number even if the tow bar’s label has faded. Look through the motorhome’s records for:
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Owner’s manuals
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Installation instructions
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Purchase receipts
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Service invoices
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Warranty paperwork
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Notes from the original installer
How to Identify Your Weight Distribution System
A weight distribution system usually has more individual components than a tow bar. You may need to inspect several pieces before you can identify the complete setup.
Common components include the receiver shank, hitch head, hitch ball, spring bars, trailer-frame brackets, and mounting hardware. Some systems also include built-in or separate sway-control components.
Start With the Hitch Head
The hitch head is the main assembly that holds the hitch ball and accepts the spring bars. Check the front, sides, underside, and area near the adjustment hardware for:
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A manufacturer's name
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A model or series name
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A casting number
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A part number
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A capacity label
A casting number may identify only the head component rather than the full system, but it can still help a towing specialist narrow down the manufacturer.
Inspect the Spring Bars
The spring bars are one of the easiest parts to recognize. They run from the hitch head toward brackets on the trailer frame. Look at their shape and how they connect to the head.
Round-bar systems typically use bars that curve downward from the hitch head. Trunnion-style bars usually extend more directly from sockets in the side or lower portion of the head. Different bar designs generally require matching hitch heads, so don’t assume a replacement bar will fit simply because its weight rating appears correct.
Search the bars for stamped or printed capacity information. Check near both ends, including the section that inserts into the head. If you find numbers on only one bar, inspect the other before assuming they match.
Look at the Trailer-Frame Brackets
Follow the spring bars toward the trailer. You may see:
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Chains hanging from snap-up brackets
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Flat spring bars resting on L-shaped brackets
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Rotating latches or clamping brackets
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Brackets with integrated friction or sway-control surfaces
The bracket style can help distinguish product families. It can also reveal whether the setup uses a basic weight distribution, separate sway control, or sway control built into the spring-bar-and-bracket connection.
Check the Shank Separately
The adjustable shank slides into the tow vehicle’s receiver and supports the hitch head. It may have its own manufacturer and rating.
Look along the shank and adjustment holes for stamped capacity information. Don’t assume the shank rating represents the rating of the spring bars or the complete weight distribution system. Each major component must be properly rated and compatible.
Search the Trailer Storage Compartments
Previous owners often store unused or replacement towing components inside the trailer. Check the front pass-through compartment, exterior storage bays, toolboxes, and under-bed storage for:
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Installation instructions
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Product boxes or labels
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Spare spring bars
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Sway-control parts
Write Down More Than the Brand Name
Knowing that you have a Blue Ox system is helpful, but it may not be enough to order replacement parts. Record the following details:
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Complete model or part number
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Spring-bar rating
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Gross trailer weight rating
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Tongue-weight rating
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Shank size and drop or rise
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Bracket style
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Any adapter or specialty connection
Photograph the complete system and each label. Take close-ups of the hitch head, spring-bar ends, frame brackets, tow-bar latches, and connection points. These details matter because equipment within the same product family may use different ratings or replacement parts.
Do Not Choose Replacement Parts by Appearance
A replacement part that looks correct may have a different rating, attachment method, or intended application.
That is especially important with spring bars. A bar that is rated too lightly may not distribute the load as intended. A bar that is rated too heavily for the actual loaded tongue weight may create a harsher setup and may not be appropriate for the trailer.
Weight distribution equipment should be selected based on the loaded towing setup, not only on the trailer’s published dry weight. Check the vehicle owner’s manual, receiver label, trailer ratings, product instructions, and actual loaded tongue weight before changing components or settings.
Once you've identified your equipment, you can compare it with Blue Ox weight distribution hitches and parts or tow bar service parts.
What to Do When the Label Is Missing
A missing or unreadable label doesn’t mean you need to guess. Take clear photos of:
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The complete tow bar or hitch assembly
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The hitch head from multiple angles
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The trailer-frame brackets
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Any stamped numbers
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The receiver and rating label
Include the year, make, and model of the motorhome or tow vehicle, plus information about the towed vehicle or trailer. For a weight distribution system, include the trailer’s loaded weight and measured loaded tongue weight when available.
Avoid using unverified equipment until you know its ratings and condition. Cracks, bent components, worn holes, missing hardware, or damaged locking mechanisms should be inspected before towing.
Confirm Your Equipment Before Your Next Trip
A clear product identification gives you a better starting point for maintenance, replacement parts, and setup adjustments. It also helps you avoid combining components that look similar but aren’t designed to work together.
Browse Blue Ox tow bars and weight distribution systems to compare your equipment with current product styles. Still unsure what you have? Contact the Blue Ox Tow Bars team for help identifying your equipment before ordering replacement parts.
Towbar & Weight Distribution System FAQs
Can the tow bar and baseplate be different brands?
They may be, particularly when an approved adapter is installed. Don’t assume the tow bar and baseplate belong to the same manufacturer. Identify both components and confirm that the adapter is intended for that combination.
Can I identify a towing system from its serial number?
A manufacturer or knowledgeable retailer may be able to use the serial number to identify the model or production period. Provide photos as well, since serial-number records and label formats vary.
Should I replace equipment if I don’t know its history?
Unknown history deserves a careful inspection. Replace equipment that is cracked, bent, heavily corroded, incomplete, or unable to lock and articulate correctly. A qualified installer can help assess components that look usable but have no maintenance records.
Can I mix spring bars from two different systems?
Don’t mix spring bars unless the manufacturer specifically confirms that the bars match the hitch head, brackets, and required rating. Similar-looking bars may use different dimensions or attachment designs.
Where can I find installation instructions for an older system?
Start with the manufacturer, the original retailer, or the installer listed in the vehicle records. A model number or a clear photo often makes it easier to locate the correct manual.
