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Quick Picks
| Product | Best For | Price |
|---|---|---|
| Eaz-Lift 5th Wheel Gooseneck Adapter | Joint-highest published tow rating at 30,000 lb, tied with the 30000lb 15" 5th Wheel to Gooseneck Adapter Hitch Converter (B0G89DK7HL) | |
| Shocker 5th Wheel to Gooseneck & Demco Coupler Conversion Kit | Full pin box replacement on 12.5-inch Lippert boxes | |
| NBJINGYI 5th Wheel to Gooseneck Adapter | Tall trailers needing 17"–23" of adjustment | |
| T-Built 5th Wheel to Gooseneck Adapter 8" | Low-clearance setups and remote-release convenience | |
| C5G1216 12"-16" Adjustable Cushioned 5th Wheel Gooseneck Adapter | Cushioned mid-height conversion with chains included |
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Last Updated: September 2026
Converting a fifth wheel to gooseneck towing is one of those decisions that sounds simple until you start reading spec sheets. Some products bolt a coupler under your existing kingpin. Others throw away the factory pin box entirely. The fitment notes matter more than any headline number.
This roundup reads the published listing specifications for ten fifth-wheel-to-gooseneck products currently available on Amazon and sorts them by the buyer each one actually fits. This website does not do hands-on testing, so every number below is attributed to the party that published it. What you get instead is a close, opinionated reading of what those published figures mean for your truck bed length, your pin box, and your loaded trailer weight.
Here's the thing about this category: the wrong choice is rarely the weakest one. It's usually the one whose fitment note you skipped.
- Fifth Wheel to Gooseneck Adapter: Adapts a fifth wheel trailer to fit gooseneck trailer hitch; the locking coupler attaches to any 2-5/16-inch gooseneck ball
- Convenient Towing: This gooseneck adapter for 5th wheel tows without a large hitch taking up the bed of the truck
- Complete 5th Wheel to Gooseneck Adapter Conversion Kit with Demco Gooseneck Coupler: Includes Replacement Camper Pin Box to fit with the Shocker Gooseneck EZ Latch Demco Coupler
- Auto Latching Demco Gooseneck Coupler fits 2-5/16" Gooseneck Ball: 24,000 lbs Gross Trailer Weight & 6,000 lbs tongue weight. Lower onto the gooseneck ball & it will automatically
- 25,000 LBS HEAVY-DUTY CAPACITY ：Engineered for high-capacity towing, this forged steel adapter is rated for up to 25,000 lbs GTW It provides a robust conversion solution for
- 17" TO 23" ADJUSTABLE HEIGHT：Customize your towing setup to fit various truck and trailer configurations. The 6-inch vertical adjustment range ensures your trailer remains level
- 【Product Description】: Fifth wheel to gooseneck coupler: C5G1216. Adjustable cushioned 5th gooseneck adapter: Towing capacity 20,000 lb. GVW, tongue weight 4,000
- 【Compatibility】: The adapter is to convert a kingpin of trailer to connect to a gooseneck hitch. The sliding collar with set screws allows it to be adjusted to any height between
- Heavy-Duty 30,000 lbs Capacity – Built from high-strength Q235 structural steel, this 5th wheel to gooseneck adapter is rated for up to 30,000 lbs GTW, providing secure and stable
- Universal 2-5/16" Ball Compatibility – Designed to fit all standard 2-5/16" gooseneck hitch balls, making it an ideal fifth wheel to gooseneck conversion solution for most pickup
- Complete 5th Wheel to Gooseneck Adapter Conversion Kit with Demco Gooseneck Coupler: Includes Replacement Camper Pin Box to fit with the Shocker Gooseneck EZ Latch Demco Coupler
- Auto Latching Demco Gooseneck Coupler fits 2-5/16" Gooseneck Ball: 24,000 lbs Gross Trailer Weight & 6,000 lbs tongue weight. Lower onto the gooseneck ball & it will automatically
- High-Performance Towing: Elevate your towing experience with our fifth wheel to gooseneck adapter, engineered for a robust towing capacity of 20,000 lbs GVW. Trust in its power
- Adaptable Height Range: Tailor your towing setup effortlessly with our adaptable adapter, offering a height adjustment from 12" to 16". Achieve the perfect alignment for your
Quick Comparison Table
| Product | Published Tow Rating | Height | Notable Spec |
|---|---|---|---|
| Eaz-Lift 5th Wheel Gooseneck Adapter, 30,000lb Tow Rating (7,500lb Vertical Load), 15 Inches (48501) | 30,000 lb tow, 7,500 lb vertical load | 15 in. overall | Locking coupler for any 2-5/16 in. gooseneck ball |
| 30000lb 15" 5th Wheel to Gooseneck Adapter Hitch Converter | 30,000 lbs GTW | Fixed 15 in. | Q235 structural steel, bolt-on, no drilling |
| Shocker 5th Wheel to Gooseneck & Demco Coupler Conversion Kit, Fits Lippert 1716 1116 0115 FabEx500 503 520 530 560-24,000 lbs GTW | 24,000 lbs GTW, 6,000 lbs tongue | 3 height adjustment holes | Replaces the factory pin box; 12.5 in. wide fitment |
| NBJINGYI 5th Wheel to Gooseneck Adapter, 25,000 lbs Heavy Duty RV Coupler Adapter, 17" to 23" Adjustable Height with Self-Centering Locking Plate, Includes Hardware Kit | 25,000 lbs GTW | 17 in. to 23 in. | Self-centering locking plate, E-coat finish |
| T-Built 5th Wheel to Gooseneck Adapter 8", with Remote Release, Made in USA, Fifth Wheel to Gooseneck Adapter for RV Camper Trailer, 20.000 Pound Rating | 20,000 lb published tow rating | 8 in. | Remote release cable, 2-year manufacturer warranty |
What to Look For in a Fifth Wheel to Gooseneck Conversion
A gooseneck conversion swaps the kingpin-and-plate connection for a coupler that drops onto a ball in your truck bed. Two published advantages drive most purchases: you free up bed space, and the connection point sits lower.
Shocker Hitch states in its listing that converting to gooseneck lets you remove the bulky fifth wheel slider, rails and hitch plates for full bed access, and that the lower tongue weight position gives more control and less chucking than a taller in-bed fifth wheel [S7]. That's the manufacturer's framing, and it's the honest reason most people do this.
Here are the criteria that actually separate these products:
- Tow rating versus your loaded trailer weight. Weigh your rig loaded, not empty, and compare that weight with the exact product's published GTW before choosing an adapter. Weigh your rig loaded, not empty.
- Tongue or vertical load rating. This is the number people skip. Eaz-Lift publishes a 7,500 lb vertical load figure [S3]; Shocker publishes 6,000 lbs tongue weight [S7]; two cushioned adapters publish 4,000 lbs [S4][S12].
- Height range. Published heights here span a fixed 8 inches [S10] up to a 17-to-23-inch adjustable range [S9]. Your trailer needs to sit level and clear the bed rails.
- Truck bed length and cab clearance. One listing explicitly says it is not recommended for trucks with beds shorter than 6 feet [S4]. Shocker states its gooseneck pin box and coupler works nicely on pickups with 8-foot, 6-foot-10 and 6-foot-6 beds [S7].
- Adapter versus pin box replacement. An adapter hangs below your existing kingpin and adds height. A pin box replacement kit swaps the whole assembly [S7]. Different geometry, different install.
- Ball size. Every product in this roundup that states a ball size uses 2-5/16 inch [S3][S6][S10][S11][S12]. The supplied listing for the NBJINGYI 5th Wheel to Gooseneck Adapter, 25,000 lbs Heavy Duty RV Coupler Adapter (B0FBFQ61L2) does not state a ball size.
- What's in the box. Safety chains are included on some [S4] and explicitly sold separately on others [S7][S8].
The Picks
Eaz-Lift 5th Wheel Gooseneck Adapter, 30,000lb Tow Rating (7,500lb Vertical Load), 15 Inches (48501) — Best for a fixed-height adapter with a published 30,000 lb tow rating and 7,500 lb vertical load
Camco's Eaz-Lift adapter carries the strongest published pair of numbers among the fixed-height adapters here: a 30,000 lb tow rating with a 7,500 lb vertical load, at an overall height of 15 inches [S3]. That vertical load figure is the one to notice. A heavy fifth wheel can put well over 4,000 lbs on the pin, and this listing publishes headroom that the 20,000 lb cushioned adapters in this roundup do not [S4][S12].
The listing describes a locking coupler that attaches to any 2-5/16-inch gooseneck ball and allows full range of motion for simple hookup and disconnect, with all parts and hardware needed for installation included [S3]. Camco also frames the core benefit plainly: it tows without a large hitch taking up the bed of the truck [S3].
Honestly, the trade-off is the fixed 15-inch height [S3]. There is no adjustment collar, so trailer level depends entirely on your truck and pin box geometry working out at that one dimension. Measure before you order.
Pros
- Highest published tow rating in this roundup at 30,000 lb, tied with one other pick [S3][S11]
- 7,500 lb published vertical load rating [S3]
- Includes all parts and hardware needed for installation per the listing [S3]
- Locking coupler fits any 2-5/16-inch gooseneck ball [S3]
- Fixed 15-inch overall height with no published adjustment range [S3]
- The supplied listing information does not state a warranty length
Verdict: Buy this if your loaded rig sits toward the heavy end and 15 inches of rise is the geometry you need, because the published 7,500 lb vertical load is the most generous pin-weight figure in this group [S3].
30000lb 15" 5th Wheel to Gooseneck Adapter Hitch Converter — Best for buyers who want a 30,000 lb rating with the steel grade published
This one matches the Eaz-Lift on headline capacity — 30,000 lbs GTW — but takes a different approach to explaining itself [S11]. The listing names the material: high-strength Q235 structural steel in a precision-welded structure [S11]. That's more construction detail than most listings in this category bother to publish.
The seller describes the 15-inch dimension as the extension from ball to kingpin plate, which is a more precise definition than a bare "overall height" figure gives you [S11]. If you're doing the arithmetic on bed rail clearance, that distinction matters. Installation is described as direct bolt-on with pre-aligned mounting holes and no drilling required [S11].
Look, the fitment claim here is broad — the listing says it's designed to fit all standard 2-5/16-inch gooseneck hitch balls [S11]. Broad ball compatibility is not the same as broad kingpin box compatibility, and the listing does not publish a tongue or vertical load rating, which is a meaningful gap when you're loading a heavy fifth wheel.
Pros
- 30,000 lbs GTW published rating [S11]
- Q235 structural steel construction named in the listing [S11]
- Bolt-on install with pre-aligned holes, no drilling [S11]
- 15-inch dimension defined specifically as ball-to-kingpin-plate extension [S11]
- The supplied listing information does not state a tongue or vertical load rating
- Fixed height only — no adjustment range published [S11]
Verdict: A reasonable pick for a heavy trailer where 15 inches is the right rise and you want the steel grade stated up front, but confirm the pin weight your trailer imposes with the manufacturer first, since that rating is not in the supplied listing [S11].
Shocker 5th Wheel to Gooseneck & Demco Coupler Conversion Kit, Fits Lippert 1716 1116 0115 FabEx500 503 520 530 560-24,000 lbs GTW — Best for a complete pin box replacement on 12.5-inch Lippert boxes
This is a different animal from everything else in the roundup. Instead of hanging an adapter below your factory kingpin, this kit completely replaces the factory fifth wheel pin box with a gooseneck pin box, then accepts an adjustable Demco gooseneck coupler [S7]. Shocker states it installs in minutes using your existing pin box bolts, which are not included [S7].
The published ratings are 24,000 lbs gross trailer weight and 6,000 lbs tongue weight, with an auto-latching Demco coupler for a 2-5/16-inch ball and three height adjustment holes [S7]. Auto-latching is the practical feature: Shocker describes lowering onto the ball for automatic latching and flipping a lever to release [S7]. That 6,000 lb tongue figure is the second-highest published pin-weight number in this roundup, behind only the Eaz-Lift's 7,500 lb vertical load [S3][S7].
Fitment is the whole story. This version fits Lippert 1716, 1116, 0115, FabEx500, 503, 520, 530 and 560 pin boxes at 12.5 inches wide, and also fits RBW 7028 and M19 Rota-Flex [S7]. Shocker publishes cab clearance guidance too — the pin box and coupler works nicely on 8-foot, 6-foot-10 and 6-foot-6 truck beds [S7]. Made by Shocker Hitch in Jamestown, ND [S7].
Pros
- 24,000 lbs GTW and 6,000 lbs tongue weight published [S7]
- Auto-latching Demco coupler with lever release [S7]
- Three height adjustment holes [S7]
- Published cab clearance guidance for 8', 6'10" and 6'6" beds [S7]
- Removes the need to keep a heavy fifth wheel hitch in the bed [S7]
- Safety chains are required for gooseneck towing and the chain kit SH-PBCK is sold separately [S7]
- Pin box bolts are not included; existing bolts are used [S7]
- Fitment is restricted to the named 12.5-inch pin boxes [S7]
Verdict: If your camper wears one of the listed 12.5-inch Lippert or RBW pin boxes, this is the pick that changes the trailer's geometry rather than stacking height onto it — and the published 6,000 lb tongue rating backs a genuinely heavy camper [S7].
Shocker 5th Wheel to Gooseneck & Demco Coupler Conversion Kit, Fits Lippert 1621 0719 RhinoBox Flexair Rota-Flex & L05-24,000 lbs GTW — Best for 12-inch Lippert RhinoBox, FlexAir and Rota-Flex pin boxes
Same kit concept, different pin box width. This version fits Lippert 1621, 0719, RhinoBox, FlexAir, Rota-Flex and L05 boxes at 12 inches wide, and also fits Helux [S8]. Everything else in the published specification tracks the other Shocker kit: 24,000 lbs GTW, 6,000 lbs tongue weight, auto-latching Demco coupler for a 2-5/16-inch ball, three height adjustment holes [S8].
Why two listings? Because pin box width is not negotiable. Choosing the 12.5-inch kit for a 12-inch box, or the reverse, is the most expensive mistake available in this category. Read the label on your existing pin box before you click anything.
Shocker's argument for the conversion is worth repeating in its own terms: converting to gooseneck lets you remove the slider, rails and hitch plates for full bed access, and puts tongue weight lower in the bed for more control and less chucking than a taller in-bed fifth wheel [S8]. The company also notes potential payload advantages from the lighter setup [S8].
Pros
- 24,000 lbs GTW and 6,000 lbs tongue weight published [S8]
- Covers the 12-inch Lippert RhinoBox, FlexAir, Rota-Flex and L05 family, plus Helux [S8]
- Auto-latching coupler, drop-on hookup and lever release [S8]
- Works on 8', 6'10" and 6'6" beds per the manufacturer [S8]
- Chain kit SH-PBCK sold separately though safety chains are required [S8]
- Pin box bolts not included [S8]
- Wrong-width purchase is a real risk given the near-identical sibling listing
Verdict: The right Shocker kit for RhinoBox, FlexAir, Rota-Flex, L05 and Helux owners with a 12-inch pin box — confirm that width measurement first, because the specification is otherwise identical to the 12.5-inch version [S8].
NBJINGYI 5th Wheel to Gooseneck Adapter, 25,000 lbs Heavy Duty RV Coupler Adapter, 17" to 23" Adjustable Height with Self-Centering Locking Plate, Includes Hardware Kit — Best for tall trailers that need serious height adjustment
The height range here is the outlier: 17 inches to 23 inches, a 6-inch vertical adjustment span, per NBJINGYI's listing [S9]. Every other adjustable adapter in this roundup tops out at 16 inches [S4][S12]. The supplied listing does not say which trailers need that much rise, so measure your kingpin height and bed rail clearance and confirm the correct height with the manufacturer before choosing between a fixed adapter and this adjustable range [S9].
The rating is 25,000 lbs GTW from what the seller describes as forged steel [S9]. NBJINGYI attributes the practical benefit of the adjustment to trailer level, saying it helps improve aerodynamics, weight distribution and overall handling [S9] — that's the seller's inference, and it's a reasonable one, since a level trailer distributes load the way the chassis was designed for.
Two more published details worth noting: a self-centering locking plate with high-tensile hardware, which the seller says is designed to minimize excessive movement and rattle [S9], and a black electrophoretic E-coat finish described as resisting rust and weathering [S9]. A complete hardware kit of high-strength bolts, lock nuts and washers is included [S9].
Pros
- 17" to 23" adjustable height — the widest reach in this roundup [S9]
- 25,000 lbs GTW published rating [S9]
- Self-centering locking plate and high-tensile hardware [S9]
- E-coat finish for outdoor corrosion resistance [S9]
- Full bolt, lock nut and washer kit included [S9]
- The supplied listing information does not state a tongue or vertical load rating
- A 17-inch minimum height is taller than most adapters here, so short-clearance setups should look elsewhere [S9]
Verdict: The pick for a tall fifth wheel where 12 to 16 inches is simply not enough rise, since its published 17-to-23-inch range starts where the cushioned adapters in this roundup end [S9][S12].
T-Built 5th Wheel to Gooseneck Adapter 8", with Remote Release, Made in USA, Fifth Wheel to Gooseneck Adapter for RV Camper Trailer, 20.000 Pound Rating — Best for low-clearance setups and hands-off unhooking
At 8 inches, this is the shortest adapter in the roundup by a wide margin [S10]. That matters more than it sounds. The supplied listing for the T-Built 5th Wheel to Gooseneck Adapter 8", with Remote Release states the 8-inch height but not which setups it suits, so measure your kingpin height and bed rail clearance and confirm the correct rise with the manufacturer [S10].
The published rating is 20,000 pounds with a self-latching, remote-release coupler and a 2-5/16-inch ball pocket [S10]. The remote release cable is the differentiator here — it means unhooking without reaching into the bed. T-Built states it works with a B&W turn over ball or any other gooseneck hitch with a 2-5/16-inch ball, and attaches to most standard kingpin boxes [S10].
Two trust signals the listing publishes that most of this category does not: made in USA, and a 2-year manufacturer warranty [S10]. Among the products in this roundup, that warranty term is the only one with a stated length. The coupler can also be padlocked for security during transport or storage [S10].
Pros
- 8-inch height, the lowest published in this roundup [S10]
- Remote release cable for unhooking without climbing into the bed [S10]
- Self-latching coupler that can be padlocked [S10]
- 2-year manufacturer warranty stated [S10]
- Made in USA per the listing [S10]
- Fixed 8-inch height with no adjustment range published [S10]
- The supplied listing information does not state a tongue or vertical load rating
Verdict: Get this one if your trailer needs minimal rise and you value a remote-release, padlockable coupler backed by a stated 2-year warranty more than you need capacity beyond 20,000 lbs [S10].
C5G1216 12"-16" Adjustable Cushioned 5th Wheel Gooseneck Adapter, Replacement for RV Camper Trailer, GTW 20000 Lbs, with Safty Chain — Best for cushioned mid-height conversion with chains in the box
The C5G1216 publishes the most complete fitment guidance of any adapter here, and some of it is a warning. The seller states a 20,000 lb towing capacity and 4,000 lbs tongue weight, with 360-degree cushioning plus 12-to-16-inch height adjustment via a sliding collar with set screws [S4]. Note that the C5G1216 12"-16" Adjustable Cushioned 5th Wheel Gooseneck Adapter (B0BQR34WS2) labels that 20,000 lb figure inconsistently — "GTW 20000 Lbs" in the product title and "Towing capacity 20,000 lb. GVW" in the feature bullet — so ask the manufacturer which limit the number actually represents before sizing a loaded trailer to it [S4].
Read the compatibility note carefully. The listing says it is not recommended for trucks with beds shorter than 6 feet, and repeats that caution [S4]. It also says it is not recommended for cushioned style king pin boxes [S4] — which makes sense, because stacking a cushioned adapter under a cushioned pin box compounds the movement rather than damping it. Locking pins secure the connection between truck and trailer [S4].
Safety chains are included here [S4], which is genuinely useful given that the Shocker kits publish chains as a separate purchase [S7][S8]. The seller offers a 10-month window to resolve issues and asks buyers to check adaptability carefully before purchasing [S4]. That's a seller commitment, not an independently verified warranty, and it's shorter than the 2-year manufacturer warranty T-Built publishes [S10].
Pros
- 4,000 lbs tongue weight published, alongside a 20,000 lb figure the listing labels "GTW" in its title and "GVW" in its feature bullet, so confirm the intended limit with the manufacturer [S4]
- 360-degree cushioning to damp movement [S4]
- 12" to 16" adjustment via sliding collar with set screws [S4]
- Safety chains included [S4]
- Locking pins secure the truck-to-trailer connection [S4]
- Not recommended for trucks with beds shorter than 6 feet [S4]
- Not recommended for cushioned style king pin boxes [S4]
- Seller support window stated as 10 months, shorter than T-Built's published 2-year warranty [S4][S10]
Verdict: A solid mid-height cushioned option for a long-bed truck with a rigid pin box, provided you confirm with the manufacturer whether its 20,000 lb figure is a gross trailer or gross vehicle limit and you take the seller's two "not recommended" notes at face value [S4].
Fifth Wheel to Gooseneck Adapter - 7-1/2" Offset, 20,000 lbs GVW, 12" to 16" Adjustable Height, 360° Cushioned, Positive Lock, Easy Installation, Fits 2-5/16" Gooseneck Ball — Best for buyers who need a published offset dimension
This adapter publishes something the others don't: a 7-1/2 inch offset, alongside the 12-to-16-inch adjustable height and 20,000 lbs GVW rating [S12]. The listing for the Fifth Wheel to Gooseneck Adapter - 7-1/2" Offset states only that the adapter is designed with a 7-1/2 inch offset for compatibility with a 2-5/16 inch gooseneck ball; it does not define how that dimension is measured or how it relates to axle placement [S12]. Confirm with the manufacturer what the figure covers before planning load placement around it.
The seller publishes 4,000 lbs GTW tongue weight and a positive lock mechanism, with installation described as requiring no drilling or welding [S12]. The adapter is 360-degree cushioned [S12], the same damping approach as the C5G1216 pick, and fits a 2-5/16-inch gooseneck ball [S12].
A note on the listing's own wording: it labels the 20,000 lbs figure as GVW and the 4,000 lbs figure as "GTW tongue weight" [S12]. Those labels don't line up with how the terms are normally used, so treat 20,000 lbs as the trailer capacity and 4,000 lbs as the pin weight, and confirm both against the manufacturer's own documentation before loading to either limit.
Pros
- 7-1/2 inch offset published, which most competing listings here omit [S12]
- 12" to 16" adjustable height [S12]
- 360-degree cushioning [S12]
- Positive lock mechanism with no drilling or welding required [S12]
- The listing's GVW and GTW labels are applied unusually, so confirm the intended limits with the manufacturer [S12]
- 20,000 lbs GVW is the lower capacity tier in this roundup [S12]
- The supplied listing information does not state a warranty length
Verdict: Worth a look when your build depends on knowing the offset dimension in advance, since the Fifth Wheel to Gooseneck Adapter - 7-1/2" Offset listing publishes a 7-1/2 inch offset alongside its 12-to-16-inch adjustable height, though the listing does not define how that offset is measured, so confirm it with the manufacturer [S12].
C5G1216 Fifth Wheel to Gooseneck Cushioned Trailer Hitch Adapter 12"-16" Adjustable Height Fifth Wheel to Gooseneck Cushioned Trailer Hitch Adapter for Camper RV Trailers 20000lbs with Safe Chain — Best for buyers matching the C5G1216 part number
This Bicos listing is organized around a part number rather than a feature pitch. It states the replacement part number C5G1216 and an application of 2-5/16-inch gooseneck hitch balls [S6]. The seller's own instruction is direct: check compatibility and the replacement part number to make sure the part fits your vehicle before purchase [S6].
The title carries the 12"-16" adjustable height, cushioned design, 20000 lbs figure and safety chain reference. But the feature bullets themselves are thin — beyond the part number, the ball application and a general brand statement about quality, there isn't detailed specification here [S6]. That's a real limitation when you're committing a 20,000 lb trailer to a coupler.
So here's the honest read: if you already know the C5G1216 part number is what your setup calls for — because you're replacing an identical unit, or a shop specified it — this listing tells you exactly that it matches. If you're specifying from scratch, the C5G1216 12"-16" Adjustable Cushioned 5th Wheel Gooseneck Adapter listing publishes considerably more detail on tongue weight and truck bed fitment [S4].
Pros
- Explicit C5G1216 replacement part number for cross-referencing [S6]
- 2-5/16-inch gooseneck ball application stated [S6]
- Seller directs buyers to verify fitment before purchase [S6]
- Feature bullets do not state a tongue weight, offset, or bed length recommendation
- Less published specification detail than the comparable C5G1216 listing [S4][S6]
Verdict: Buy this one when the C5G1216 part number is already what your setup requires and you simply need a match, since that part number is exactly what the listing confirms [S6].
Fifth Wheel to Gooseneck Cushioned Trailer Hitch Adapter - 12" to 16" Adjustable Height Converter Gooseneck Trailer Hitch Adapter — Best for buyers who will verify specs directly with the seller
I'll be blunt about this one: the supplied listing information is a single sentence. The seller states that the cushioned gooseneck adapter converts your 5th wheel into a gooseneck within minutes [S5]. The title carries a 12-to-16-inch adjustable height and a cushioned design, but the feature bullets add nothing about tow rating, tongue weight, ball size, materials, hardware or truck bed fitment.
That absence is not evidence the manufacturer never publishes those figures — it means they are not in the listing information supplied here. For a component that carries the entire connection between a heavy trailer and a pickup, though, missing tow and tongue ratings are the two numbers you cannot proceed without.
If the cushioned 12-to-16-inch format is what you want, the C5G1216 12"-16" Adjustable Cushioned 5th Wheel Gooseneck Adapter publishes a 20,000 lb rating that its title labels "GTW" and its feature bullet labels "GVW", a 4,000 lbs tongue weight and explicit bed-length guidance [S4], and the Fifth Wheel to Gooseneck Adapter - 7-1/2" Offset adds a stated offset dimension [S12]. Both give you more to work with.
Pros
- Cushioned design in the 12" to 16" adjustable format [S5]
- Seller describes conversion as completing within minutes [S5]
- The supplied listing information does not state a tow rating, tongue weight, ball size or materials
- No published truck bed length or pin box compatibility guidance
Verdict: Only consider this if you contact the seller and confirm the tow rating, tongue weight and ball size in writing first, because the supplied listing does not publish any of them [S5].
How We Research
This website does not perform hands-on testing, and no one here has towed with, installed, or handled any product above. The research method is deliberate and narrow: we pull each product's verified record through the Amazon Creators API, read every published listing feature bullet in full, and compare the stated figures against each other — tow rating against tongue rating, height range against height range, fitment note against fitment note. All records above were retrieved on September 10, 2026.
Where a listing states a figure, we attribute it to the seller or manufacturer that published it. Where a listing is silent, we say the supplied listing information does not state it rather than guessing or borrowing a number from a similar-looking product. Cross-brand claims about popularity, durability in service, or real-world failure rates are not something spec sheets can establish, so we don't make them.
For towing hardware specifically, published ratings are a starting point, not a substitute for verification. The U.S. Consumer Product Safety Commission maintains recall and safety information for consumer products [S1], and general consumer protection guidance is available through USA.gov [S2].
Recommendation by Use Case
Heaviest trailers, fixed geometry: The Eaz-Lift 5th Wheel Gooseneck Adapter, 30,000lb Tow Rating (7,500lb Vertical Load), 15 Inches (48501) publishes a 30,000 lb tow rating with a 7,500 lb vertical load at 15 inches overall height, which is the strongest combination of capacity and pin-weight headroom in this roundup [S3]. Check Price on Amazon
Lippert 12.5-inch pin box owners: The Shocker 5th Wheel to Gooseneck & Demco Coupler Conversion Kit, Fits Lippert 1716 1116 0115 FabEx500 503 520 530 560-24,000 lbs GTW replaces the factory pin box entirely and publishes 24,000 lbs GTW with 6,000 lbs tongue weight and an auto-latching Demco coupler [S7]. Check Price on Amazon
Lippert 12-inch pin box owners: The Shocker 5th Wheel to Gooseneck & Demco Coupler Conversion Kit, Fits Lippert 1621 0719 RhinoBox Flexair Rota-Flex & L05-24,000 lbs GTW covers the RhinoBox, FlexAir, Rota-Flex, L05 and Helux family with the same 24,000 lbs GTW and 6,000 lbs tongue rating [S8]. Check Price on Amazon
Tall trailers needing extra rise: The NBJINGYI 5th Wheel to Gooseneck Adapter, 25,000 lbs Heavy Duty RV Coupler Adapter publishes a 25,000 lbs GTW rating with a 17" to 23" adjustable height and a self-centering locking plate [S9]. Check Price on Amazon
Minimal rise plus convenience: The T-Built 5th Wheel to Gooseneck Adapter 8", with Remote Release combines an 8-inch height with a remote release cable, a padlockable self-latching coupler and a stated 2-year manufacturer warranty at a 20,000 pound rating [S10]. Check Price on Amazon
Final Verdict
If I had to point one buyer at one product on published specification alone, it would be the Shocker kit matching their pin box width. The reason is structural, not brand loyalty: replacing the pin box lowers the connection point instead of stacking height onto an existing kingpin, and Shocker publishes 24,000 lbs GTW with 6,000 lbs tongue weight plus specific cab clearance guidance for 8-foot, 6-foot-10 and 6-foot-6 beds [S7]. That's the most complete fitment picture in this roundup.
But that recommendation is conditional on your camper wearing one of the named Lippert, RBW, Rota-Flex or Helux pin boxes [S7][S8]. If it doesn't, the adapter route is your route, and then the choice comes down to height and pin weight. Need serious rise? The NBJINGYI's 17-to-23-inch range [S9]. Need minimal rise and easy unhooking? T-Built's 8-inch adapter with remote release [S10]. Need maximum published capacity? Eaz-Lift's 30,000 lb rating with 7,500 lb vertical load [S3].
What I would not do is buy on capacity alone. A 30,000 lb rating is worthless if the adapter puts your trailer 4 inches nose-high, and a cushioned adapter under a cushioned pin box is specifically discouraged by one seller in this roundup [S4]. Measure your bed rail height, weigh your loaded pin weight, identify your pin box by part number, and only then pick a product. Safety chains are required for gooseneck towing and are not included with every option here [S4][S7].
For related setup reading on this site, see our guides to towing weight distribution basics and truck bed hitch installation.
Frequently Asked Questions
It's a component that converts a fifth wheel trailer's kingpin connection so it can attach to a gooseneck hitch ball. Camco describes its Eaz-Lift unit as adapting a fifth wheel trailer to fit a gooseneck trailer hitch, with a locking coupler that attaches to any 2-5/16-inch gooseneck ball [S3]. The main practical benefit sellers cite is that it tows without a large hitch taking up the bed of the truck [S3].
Do I need safety chains with a gooseneck conversion?
Yes. Shocker Hitch states in its listing that safety chains are required with gooseneck towing, and that its chain kit SH-PBCK is sold separately from the conversion kit [S7]. Some adapters do include chains — the C5G1216 12"-16" Adjustable Cushioned adapter listing states safety chains are included [S4]. Check the specific listing before you assume.
What's the difference between an adapter and a pin box replacement kit?
An adapter bolts to your existing kingpin box and hangs a gooseneck coupler below it, adding height. A pin box replacement kit like the Shocker unit completely replaces the factory fifth wheel pin box with a gooseneck pin box, then accepts an adjustable Demco coupler [S7]. Shocker states the swap uses your existing pin box bolts, which are not included in the kit [S7].
Does my truck bed length matter?
It can. The C5G1216 12"-16" Adjustable Cushioned adapter listing states it is not recommended for trucks with beds shorter than 6 feet [S4]. Shocker publishes the opposite side of the same question, saying its gooseneck pin box and coupler works nicely on pickups with 8-foot, 6-foot-10 and 6-foot-6 truck beds [S7]. Shorter beds reduce the turning clearance between the trailer nose and the cab.
What ball size do these use?
Every product in this roundup that states a ball size uses a 2-5/16 inch gooseneck ball [S3][S6][S10][S11][S12]. The supplied listing for the NBJINGYI 5th Wheel to Gooseneck Adapter, 25,000 lbs Heavy Duty RV Coupler Adapter (B0FBFQ61L2) does not state a ball size, so confirm it with the manufacturer. T-Built adds that its coupler works with a B&W turn over ball or any other gooseneck hitch using that ball size [S10].
Which one has the highest published tow rating?
Two products tie at 30,000 lbs: the Eaz-Lift adapter, which publishes 30,000 lb tow with a 7,500 lb vertical load at 15 inches height [S3], and the 30000lb 15" 5th Wheel to Gooseneck Adapter Hitch Converter, which publishes 30,000 lbs GTW from Q235 structural steel at a fixed 15-inch ball-to-kingpin-plate extension [S11]. Only the Eaz-Lift listing states a vertical load figure alongside it [S3].
Are cushioned adapters worth it?
Cushioned adapters use a damping element to absorb chucking. Two listings here describe 360-degree cushioning [S4][S12]. The important caveat comes from one of those same sellers: the C5G1216 listing states it is not recommended for cushioned style king pin boxes [S4], so stacking cushioning on cushioning is discouraged by the manufacturer.
Is a higher tow rating always better?
No. Height and pin weight matter as much. A trailer that sits nose-high on an over-tall adapter handles worse regardless of its rating, and several listings here publish a tow rating without a tongue or vertical load rating. The C5G1216 and offset adapter listings state 4,000 lbs GTW tongue weight [S4][S12]. Shocker states 6,000 lbs tongue weight [S7], while Eaz-Lift states a 7,500 lb vertical load [S3]. Verify which limit applies to your setup before loading.
Sources & Methodology
Nothing on this page came from a garage, a scale, or a highway. This site does not run physical or laboratory testing, and no product in this roundup has been installed, towed with, or handled by anyone here. What we did instead was pull each of the ten products' verified records through the Amazon Creators API on September 10, 2026, read every published listing feature bullet, and line the stated figures up against each other — tow rating, tongue and vertical load rating, height range, offset, pin box width, ball size, and what ships in the box.
That method is a good fit for towing hardware specifically, because the numbers that decide whether an adapter works for you are dimensional and published: your pin box part number either appears in the fitment list or it doesn't, and your loaded pin weight either falls under the stated rating or it doesn't. It's a poor fit for questions no spec sheet answers — long-term wear, how a coupler feels after a season of gravel roads, or whether a given seller stands behind a claim. For those, confirm with the manufacturer and check current safety information through the Consumer Product Safety Commission [S1].
Use this page to narrow the field to two or three candidates that match your pin box, bed length and weights. Then verify those exact figures with the manufacturer before you bolt anything to a trailer.