Best Gooseneck To 5Th Wheel Adapter

#1 · Best Overall

1. FlexHitch Round-Tube Adapter

• Material: Alloy Steel
• Compatible with Vehicle Type: Truck

Best for: Four-inch round-tube fit.

Why it ranks #1: Its title specifically identifies a gooseneck-to-5th-wheel adapter for a 4-inch round outer tube, and included components list a kingpin adapter and two lube plates.

The FlexHitch GC-021R is specifically identified for trailers with a 4-inch round outer tube, making that fit detail its key selection point. It converts a gooseneck connection to a fifth-wheel kingpin adapter arrangement and includes two fifth-wheel lube plates, giving buyers a listed accessory pair alongside the adapter.

The 4-inch round outer-tube specification narrows the intended trailer fit, so it is a useful first check before choosing this adapter. Alloy-steel construction identifies the adapter material, while the two included fifth-wheel lube plates provide components for the fifth-wheel interface. The listing identifies truck compatibility and the GC-021R model, but provides no towing-capacity figure in the supplied specifications. This is therefore most suitable when the tube dimension matches and the required capacity is established from applicable product documentation.

Skip it if you need height adjustment or cushioning; Lamerto C5G1216 lists a 12-to-16-inch adjustable cushioned adapter.

Choose this for a trailer with the specified 4-inch round outer tube when the included lube plates suit your fifth-wheel interface. Its supplied specifications do not state a towing-capacity figure, so capacity is a key boundary to resolve.

Listed on Amazon as: Heavy Duty Gooseneck to 5th Wheel Adapter for 4" Round Outer Tube Trailer

#2 · Best Alternate Direction Match

2. springcraze Coupler Adapter

• Weight: 39 lb

Best for: Gooseneck-to-fifth-wheel coupler.

Why it ranks #2: The listing explicitly calls this a gooseneck-to-5th-wheel adapter, matching the requested direction, though it supplies no tube-fit or towing-capacity details.

The springcraze SC1-3 is identified as a heavy-duty gooseneck-to-fifth-wheel adapter coupler, making conversion direction its clearest selection detail. Its listed package component is a gooseneck ball adapter, so buyers should use the title and supplied specifications to distinguish this product from fifth-wheel-to-gooseneck adapters.

The product title specifies a gooseneck-to-fifth-wheel adapter, a direction that matters when matching the coupler to the trailer and towing hardware. The supplied specifications identify model SC1-3, a 39-pound item weight, and a gooseneck ball adapter as an included component. They do not provide a capacity or fit dimensions in the supplied facts, so these details do not establish suitability for a particular load or connection. Treat direction and verified fit requirements as essential before selecting it.

Skip it if you need a stated 25,000-pound capacity for fifth-wheel-to-gooseneck towing; CURT 16085 lists that rating.

This may suit buyers specifically seeking a gooseneck-to-fifth-wheel coupler and whose interface and load requirements are independently established. The supplied facts do not state capacity or fit dimensions, so those are important boundaries.

Listed on Amazon as: Heavy Duty Gooseneck to 5th Wheel Adapter Trailer Coupler

#3 · Best Rail-Mounted Option

3. CURT 16085 Spyder

• Material: carbide
• Compatible with Vehicle Type: Truck
• Weight: 50 lb

Best for: Fifth-wheel rail-equipped trucks.

Why it ranks #3: This adapter mounts to industry-standard 5th-wheel base rails and has a 25,000-pound gross trailer weight rating, but converts in the reverse direction.

CURT’s Spyder 16085 mounts to industry-standard fifth-wheel base rails and carries a stated 25,000-pound gross trailer weight rating. For pickup owners who already have those rails, its four-pin installation and removal also provide a direct way to clear the truck bed when fifth-wheel hardware is not needed.

The rail-mounted design lets a truck equipped with industry-standard fifth-wheel base rails tow a gooseneck trailer, adding another towing configuration without replacing the listed rail setup. CURT specifies a welded 2-5/16-inch trailer ball and a 25,000-pound gross trailer weight rating, details that help buyers assess connection and load requirements. Its four-pin installation and removal support a more convenient changeover and truck-bed access. The key fit condition is having the compatible base rails installed in the pickup.

Skip it if you need a kingpin-mounted adapter rather than a rail-mounted plate; Misakomo 2085295 is a kingpin-to-gooseneck ball adapter.

This suits pickup owners with industry-standard fifth-wheel rails who want a gooseneck option and removable hardware for truck-bed access. Its rail requirement and 25,000-pound gross trailer weight rating define the key fit boundaries.

Listed on Amazon as: CURT 16085 Spyder 5th Wheel to Gooseneck Adapter Hitch, Fits Industry-Standard Rails, 25,000 lbs, 2-5/16-Inch Ball

#4 · Highest Listed Vertical Load

4. NUOVEPE Gooseneck Hitch Plate

• Material: Heavy Duty Hardened Steel
• Compatible with Vehicle Type: Gooseneck Trailers, Truck
• Weight: 15.94 kg

Best for: Heavy-load fifth-wheel rail plate.

Why it ranks #4: The rail-mounted plate is rated for 30,000 pounds gross trailer weight and 6,500 pounds vertical load, though its listed conversion direction is reverse.

NUOVEPE’s rail-mounted gooseneck plate lists a 30,000-pound gross trailer weight rating and 6,500-pound maximum vertical load, giving heavy-haul buyers two specific capacity figures to assess. Its stated compatibility with all industrial-standard fifth-wheel rails makes the rail interface the central fit consideration for this adapter.

The plate converts standard fifth-wheel rails to a gooseneck connection, allowing a truck with that rail interface to tow listed gooseneck trailer types. Its heavy-duty hardened-steel construction accompanies the stated 30,000-pound gross trailer weight and 6,500-pound vertical-load limits, which should be considered separately when matching trailer and truck requirements. The title specifies a 2-5/16-inch ball, while the features name dump, boat, and farm trailers among possible uses. Confirm the rail and ball interface against the intended setup.

Skip it if you need a kingpin-box-mounted conversion; Lamerto C5G1216 mounts directly to the king pin and adjusts from 12 to 16 inches.

This fits truck owners with standard fifth-wheel rails seeking a gooseneck ball plate and whose loads fit its stated ratings. Its rail-mount format and 2-5/16-inch ball are essential interface checks.

Listed on Amazon as: Gooseneck Hitch Plate, 5th Wheel Adapter with 2-5/16" Ball

#5 · Best Offset Option

5. TOWGUARD Offset Adapter

• Material: Alloy Steel, Carbon Steel
• Compatible with Vehicle Type: 5th Wheel Trailer, Convert-a-ball King Pin…
• Weight: 28.1 kg

Best for: Offset adapter for short beds.

Why it ranks #5: Its 6-inch offset and 17-to-23-inch adjustable range address a specific clearance setup; the listing rates it at 30,000 pounds gross trailer weight.

TOWGUARD’s patented 6-inch offset is the defining feature for short-bed truck owners considering a fifth-wheel-to-gooseneck conversion. The adapter also lists 17-to-23-inch height adjustment, a safety chain, and a 30,000-pound gross trailer weight rating, combining offset geometry with a taller adjustment range and a stated towing limit.

The 6-inch offset is presented for short-bed truck use, while the 17-to-23-inch adjustment range gives buyers a way to match different connection heights. TOWGUARD lists a 30,000-pound gross trailer weight rating and 4,000-pound vertical tongue weight, so both load figures matter when checking a setup. The supplied facts also identify a safety chain and cast-steel upper body. Its fit is described for fifth-wheel and Convert-a-Ball kingpin-box trailers, which makes kingpin-box compatibility a practical check.

Skip it if you need a stated 6,500-pound vertical load limit; NUOVEPE NU1287 lists that maximum vertical load.

This suits short-bed truck owners seeking offset and height adjustment, provided their trailer interface is compatible and its loads remain within the stated 30,000-pound gross and 4,000-pound vertical limits.

Listed on Amazon as: Patented 6" Offset Cast Steel 5th Wheel to Gooseneck Adapter, 17-23" Adjustable, 30K GTW, for Short Bed Trucks, with Safety Chain

#6

6. PSAUTO Cushioned Adapter

• Material: Alloy Steel
• Compatible with Vehicle Type: Fifth Wheel RV

Best for: Cushioned adjustable conversion.

Why it ranks #6: The adjustable cushioned model lists a 9,071.85-kilogram maximum towing capacity and a limited lifetime warranty, but converts 5th wheel to gooseneck.

PSAUTO combines a cushioned fifth-wheel-to-gooseneck conversion with a stated 12-to-16-inch adjustable height range. That pairing gives RV owners both a way to accommodate different connection heights and a cushioning feature intended for towing comfort, without the listing requiring a more elaborate feature set to make those benefits clear.

The 12-to-16-inch adjustment range helps buyers account for height differences between the trailer kingpin and gooseneck ball. PSAUTO describes the converter as cushioned and says it converts a fifth wheel into a gooseneck within minutes, linking the feature to both towing and setup workflow. Alloy-steel construction is specified, and the compatible vehicle type is a fifth-wheel RV. The listed maximum towing capacity is 9,071.85 kilograms, so buyers should treat that figure as a firm selection boundary for their trailer.

Skip it if you require the listed 30,000-pound gross trailer weight rating; TOWGUARD FG-61-E6-L specifies that rating.

This fits fifth-wheel RV owners seeking an adjustable cushioned conversion and whose towing requirements remain within its listed 9,071.85-kilogram maximum. The stated compatible vehicle type is fifth-wheel RV, making that a central fit consideration.

Listed on Amazon as: Fifth Wheel to Gooseneck Cushioned Trailer Hitch Adapter – 12" to 16" Adjustable Height Converter Gooseneck Trailer Hitch Adapter

#7

7. Convert-A-Ball C5G1216

• Weight: 67 lb

Best for: Cushioned adjustable fifth-wheel.

Why it ranks #7: Its cast-steel adapter adjusts from 12 to 16 inches and lists 20,000-pound towing and 4,000-pound pin-weight capacities; conversion is reverse.

Convert-A-Ball combines adjustable 12-to-16-inch height with poly cushions that absorb shock, making its C5G1216 a fit for buyers focused on both connection height and towing bounce. The listed ratings are 20,000 pounds towing capacity and 4,000 pounds pin weight, providing clear load limits for setup decisions.

The adjustable height allows the adapter to serve multiple applications, while poly cushions are specified to absorb shock for a smoother ride. The manufacturer also says the cushioning reduces bounce and vibration and minimizes wear on the trailer and vehicle, connecting the material to potential towing and equipment benefits. Its cast-steel construction is listed alongside 20,000-pound towing and 4,000-pound pin-weight capacities. Buyers should account for both load figures and the stated 12-to-16-inch adjustment range when assessing fit.

Skip it if you need an offset for a short-bed truck; TOWGUARD FG-61-E6-L lists a patented 6-inch offset.

This suits fifth-wheel owners who want a cushioned, height-adjustable gooseneck adapter within the listed towing and pin-weight limits. Match the 12-to-16-inch range and both capacity figures to the trailer and towing setup.

Listed on Amazon as: C5G1216 Adjustable 5th Wheel/Gooseneck Adapter – 12"-16"

#8

8. Lamerto C5G1216

• Material: Stainless Steel
• Compatible with Vehicle Type: Car, Trailer, Truck
• Weight: 27.8 kg

Best for: Adjustable cushioned RV towing.

Why it ranks #8: This 12-to-16-inch adjustable cushioned adapter includes a safety chain, but its stated use converts a 5th-wheel kingpin to a gooseneck.

A 12-to-16-inch adjustable body lets this Lamerto adapter match the height between a gooseneck ball and a fifth-wheel kingpin plate. Its built-in cushioning structure is intended to reduce towing shock and vibration, while the included safety chain adds a listed safety component for compatible camper, RV, and trailer setups.

The sliding collar and set screws let you adjust and lock the adapter across its stated 12-to-16-inch range, helping accommodate different kingpin-box heights. Lamerto says it mounts directly to the king pin and converts a fifth wheel to gooseneck towing within minutes, without drilling or welding, which can simplify installation. Its cushioning structure addresses shock and vibration during towing, and the supplied safety chain is part of the package. The listing says it fits most camper, RV, and trailer kingpin boxes.

Skip it if you need a stated rating above 20,000 pounds; NUOVEPE NU1287 lists a 30,000-pound gross trailer weight rating.

This suits RV and trailer owners converting a compatible kingpin box to gooseneck towing who value height adjustment and cushioning. Check that its 12-to-16-inch adjustment range and 20,000-pound rating meet your setup.

Listed on Amazon as: C5G1216 12"-16" Adjustable Height Cushioned 5th Wheel to Gooseneck Adapter w/Safety Chain for Camper/RV/Trailer's Kingpin Box, Fifth Wheel to Gooseneck Coupler Towing Adapter, GTW 20000

#9

9. MFZDQL C5G1216

• Material: Alloy Steel
• Compatible with Vehicle Type: Trailer
• Weight: 23.13 kg

Best for: High-capacity adjustable towing.

Why it ranks #9: It lists a 20,000-pound towing capacity, 4,000-pound maximum vertical pin weight, and two-year warranty, but serves the reverse conversion.

MFZDQL pairs 12-to-16-inch height adjustment with stated limits of 20,000 pounds gross towing capacity and 4,000 pounds vertical pin weight. This gives trailer owners concrete height and load figures to compare against their setup, while its cushioned adapter format converts a kingpin connection to a gooseneck hitch.

The adjustable 12-to-16-inch height range helps match the adapter to a trailer kingpin box and the truck’s gooseneck connection. Cushioning is specified in the product title and features, offering a listed means of addressing shock during towing. The 20,000-pound towing capacity and 4,000-pound maximum vertical pin weight provide separate limits to consider, rather than relying on gross trailer weight alone. Alloy-steel construction is also specified, and the product is listed for trailer compatibility.

Skip it if you need a 25,000-pound rating for a rail-mounted setup; CURT 16085 lists that gross trailer weight capacity.

This is a fit for trailer owners who need adjustable height, cushioning, and ratings up to the stated 20,000-pound gross towing and 4,000-pound vertical pin limits. Verify both figures against the intended trailer and kingpin box.

Listed on Amazon as: C5G1216, 5th Wheel to Gooseneck Adapter 12"-16", Adjustable Cushioned Fifth Wheel to Gooseneck, Towing Capacity 20000 Lbs

#10

10. Misakomo Kingpin Adapter

• Material: Alloy Steel
• Compatible with Vehicle Type: Truck, Tractor, Trailer

Best for: Forged-steel kingpin adapter.

Why it ranks #10: Its 2-5/16-inch ball and 2-inch kingpin dimensions identify a specific reverse-direction adapter, not the requested gooseneck-to-5th-wheel conversion.

Misakomo uses solid forged steel and one-piece machining for its kingpin-to-gooseneck ball adapter, a construction choice the listing associates with even force distribution and resistance to breakage. Its specified 2-inch kingpin size and 2-5/16-inch ball size make connection dimensions central to deciding whether this adapter suits a towing setup.

The one-piece machined steel body is described as distributing force evenly, while a protective coating is intended to resist rust in weather exposure. Those details matter for buyers prioritizing durable construction and outdoor use. The adapter is specified for a 2-inch kingpin and a 2-5/16-inch gooseneck ball, so both interfaces must match the intended equipment. Its listing identifies truck, tractor, and trailer compatibility, but does not provide an adjustable-height range or a numerical towing capacity in the supplied facts.

Skip it if you need a stated 12-to-16-inch adjustment range; PSAUTO GN-PSAUTO-01 lists that adjustable height.

This suits buyers whose kingpin and ball dimensions match the stated 2-inch and 2-5/16-inch interfaces and who value forged, coated construction. Height adjustment is not specified, so it is not the choice for a height-matching requirement.

Listed on Amazon as: Fifth Wheel to Gooseneck Adapter, Kingpin to Gooseneck Ball Hitch Adapter