A strong air-ride fifth-wheel pin box should match your trailer’s mounting pattern and capacity while cushioning road shock and fore-and-aft movement. The Lippert Components L05 Flex Air 21K is a strong starting point for owners seeking an air bag, oil shock, rubberized buffer and pivoting head in one design. This roundup compares six options, including conventional replacement pin boxes, Shocker assemblies that include a kingpin, and a Reese Goose Box designed for a gooseneck ball.
Those categories are not interchangeable: confirm the trailer’s pin-box model and the truck’s hitch arrangement before choosing. Listed capacities range from 18,000 to 24,000 pounds, but the highest figure alone does not establish compatibility.
Use the product-specific fitment details and your trailer’s requirements to narrow the options.
The Lippert Components L05 Flex Air 21K leads because its listed design combines an integrated air bag, oil shock, rubberized compound and pivoting head to address road shock, rebound and chucking. Its 21,000-pound capacity suits buyers whose trailer and mounting pattern match this pin box. Confirm that fitment before buying: capacity alone cannot verify compatibility, and the product listing does not provide a complete vehicle-specific application chart.
Our Top Picks
Best OverallIts 21,000-pound rating pairs an air bag, oil shock, rubberized compound and pivoting head to address shock, rebound and chucking.
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Best 1621 ReplacementThis 21,000-pound air-ride pin box explicitly replaces a Lippert 1621 pin box and is designed to reduce road shock, vibration and chucking.
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Highest CapacityIts 24,000-pound GTW rating tops this group, and listed fitment includes Lippert 1621, 0719, RhinoBox, FlexAir, Rota-Flex and L05.
View on Amazon- Gooseneck Option Reese 94920 Goose Box
Compare the air-ride fifth-wheel pin boxes
| # | Product | Weight | Material | Compatible with Vehicle Type | Buy |
|---|---|---|---|---|---|
| 1 | 1. Lippert L05 Flex Air 21KBest Overall | 243 lb | — | — | View on Amazon |
| 2 | 2. CURT L05 Air Ride 21KBest 1621 Replacement | 170 lb | Alloy Steel | Truck, SUV | View on Amazon |
| 3 | 3. Shocker Quick Air Ride 1621Highest Capacity | 113 lb | Air Ride System, Outer Material (Powder… | 12" Wide Pin Box (Also Fits Helux), 5th Wheel… | View on Amazon |
| 4 |  4. Reese 94920 Goose BoxGooseneck Option | 220 lb | Alloy Steel | Trailer, Truck | View on Amazon |
| 5 |  5. CURT L05 Air Ride 18K18K fifth-wheel comfort | 105.23 kg | Alloy Steel | Trailer | View on Amazon |
| 6 |  6. Shocker Quick Air Ride 111624K FabEx-pattern replacement | 123.5 lb | — | 12.5" Wide Pin Box (Also Fits M19 Rota-Flex… | View on Amazon |
Detailed Reviews: Best Air Ride Hitch For Fifth Wheel
#1 · Best Overall
1. Lippert L05 Flex Air 21K
- Weight: 243 lb
Best for: 21K rebound-control towing.
Why it ranks #1: Its 21,000-pound rating pairs an air bag, oil shock, rubberized compound and pivoting head to address shock, rebound and chucking.
An oil shock absorber manages rebound while the air bag absorbs road shock, pairing impact cushioning with kickback control. This L05 Flex Air pin box also uses a rubberized compound and pivoting head to address jarring motion and fore-aft movement, with a stated 21,000-pound rating.
The air bag absorbs road shock and vibration, while the oil shock handles rebound to dampen kickback and control chucking. A durable rubberized compound adds a buffer against jarring motion, and the pivoting head helps reduce fore-aft movement between coach and tow vehicle. Those features target different parts of the towing motion rather than relying on a single cushion. The 21,000-pound rating is the listed capacity; the supplied details do not identify specific mounting-pattern compatibility.
- Air bag absorbs road shock and vibration
- Oil shock dampens rebound and kickback
- Rubberized compound buffers jarring motion
- 21,000-pound rating is specified
- Its 21,000-pound rating is below the 24,000-pound rating listed for the Shocker Hitch Quick Air Ride B0DVRZL7QY.
Skip it if you need a listed 24,000-pound GTW rating; the Shocker Hitch Quick Air Ride for Lippert 1621 and 0719 (B0DVRZL7QY) specifies that capacity.
This pin box suits buyers prioritizing rebound control alongside air-bag cushioning, provided their trailer’s load is within 21,000 pounds. Check the application carefully because the supplied product details do not name compatible mounting patterns.
Full product details
| Brand | Lippert Components |
|---|---|
| Item Weight | 243 pounds |
| Item model number | 369535 |
| Manufacturer | Trailair® |
| Part Number | 369535 |
| Model | L05 Flex Air® Pin Box 21,000 lbs |
| Dimensions | 42 x 16.25 x 20 inches |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer – www.P65Warnings.ca.gov |
Listed on Amazon as: L05 Flex Air® Pin Box 21,000 lbs
View on Amazon#2 · Best 1621 Replacement
2. CURT L05 Air Ride 21K
- Weight: 170 lb
- Material: Alloy Steel
- Compatible with Vehicle Type: Truck, SUV
Best for: Lippert 1621 replacement.
Why it ranks #2: This 21,000-pound air-ride pin box explicitly replaces a Lippert 1621 pin box and is designed to reduce road shock, vibration and chucking.
A Trailair air-ride buffer targets road shock, vibration, and chucking, and this model specifically replaces a Lippert 1621 pin box. Its 21,000-pound capacity makes it an option for owners seeking a stated fitment and load rating alongside cushioning during fifth-wheel towing.
The air-ride pin box acts as a buffer between tow vehicle and RV, with the listed benefits focused on reducing road shock, vibration, and chucking. Its specified replacement application is the Lippert 1621 pin box, which gives owners of that pattern a concrete fitment starting point. The 21,000-pound capacity sets the load boundary. Because the listing names a particular replacement pattern rather than a broad fitment range, buyers should match their existing pin-box application to that specification.
- Replaces a Lippert 1621 pin box
- 21,000-pound capacity
- Air ride targets road shock and vibration
- Listed to help control chucking
- Its stated replacement fitment is Lippert 1621.
Skip it if you need a listed 24,000-pound rating; the Shocker Hitch Quick Air Ride for Lippert 1621 and 0719 (B0DVRZL7QY) specifies 24,000-pound GTW.
Choose this option if your trailer uses a Lippert 1621 pin box and its load is within 21,000 pounds. Its stated replacement pattern is a key fitment boundary, so it is not a universal pin-box match.
Full product details
| Brand | Lippert Components |
|---|---|
| Compatible with Vehicle Type | Truck, SUV |
| Included Components | Pin Box |
| Item Weight | 170 pounds |
| Manufacturer | Lippert Components |
| Part Number | 158778 |
| Manufacturer Warranty Description | 90 day |
| Material | Alloy Steel |
| Model Number | 158778 |
| Style | Modern |
| Style Name | Modern |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer – www.P65Warnings.ca.gov |
#3 · Highest Capacity
3. Shocker Quick Air Ride 1621
- Weight: 113 lb
- Material: Air Ride System, Outer Material (Powder…
- Compatible with Vehicle Type: 12" Wide Pin Box (Also Fits Helux), 5th Wheel…
Best for: 24K Lippert-pattern replacement.
Why it ranks #3: Its 24,000-pound GTW rating tops this group, and listed fitment includes Lippert 1621, 0719, RhinoBox, FlexAir, Rota-Flex and L05.
This Shocker package combines a replacement pin box with an air hitch and kingpin, and lists a 24,000-pound gross trailer weight rating. It fits specified Lippert patterns and several named alternatives, giving owners of those setups an air-ride replacement that works with a bed-mounted fifth-wheel hitch.
The replacement pin box and Shocker air hitch with kingpin work in conjunction with a bed fifth-wheel hitch, so the package retains that connection workflow. The listing identifies fitment for Lippert 1621, 0719, RhinoBox, Flexair, Rota-Flex, and L05 patterns, plus a 12-inch-wide pin box. It states installation in minutes and describes reducing stress, breakage, wear, and tear. Pin box bolts are not included, so installation requires accounting for those separately.
- 24,000-pound GTW rating
- Includes replacement pin box and air hitch with kingpin
- Lists Lippert 1621, 0719, RhinoBox, Flexair, Rota-Flex, and L05 fitments
- Specified to work with a bed fifth-wheel hitch
- Pin box bolts are not included.
Skip it if you have a Lippert 1116 or FabEx 500-series pattern; the Shocker Hitch Quick Air Ride B0DVRZ7CK9 lists those fitments instead.
Consider it if your trailer uses one of the listed 12-inch-wide-compatible patterns and you tow with a bed fifth-wheel hitch. The stated 24,000-pound GTW and excluded pin box bolts are important setup boundaries.
Full product details
| Brand | Shocker Hitch |
|---|---|
| Compatible with Vehicle Type | 12" Wide Pin Box (Also Fits Helux), 5th Wheel Camper, Fits Lippert 1621 0719 RhinoBox FlexAir Rota-Flex & L05 |
| Included Components | Air Ride Hitch with Kingpin, Does Not Include Pin Box Bolts, Pin Box for 5th Wheel Camper |
| Item Weight | 113 pounds |
| Manufacturer | Shocker Hitch |
| Part Number | SH-800-KP-X |
| Manufacturer Warranty Description | Shocker Hitch Guarantee & 1 Year Warranty Policy. This Product Does Not Void Your Camper Warranty. The Magnuson-Moss Act 15 U.S.C. § 2302(c) prohibits companies who provide warranties for their products from disclaiming the warranty when a consumer uses a different company’s product in connection wi |
| Material | Air Ride System, Outer Material (Powder Coated Steel), Urethane Bump Cushions |
| Model Number | SH-800-KP-X |
Listed on Amazon as: Shocker Quick Air Ride 5th Wheel Pin Box with Kingpin, Fits Lippert 1621 0719 RhinoBox Flexair Rota-Flex & L05-24,000 lbs GTW
View on Amazon#4 · Gooseneck Option
4. Reese 94920 Goose Box
- Weight: 220 lb
- Material: Alloy Steel
- Compatible with Vehicle Type: Trailer, Truck
Best for: Goose-ball fifth-wheel towing.
Why it ranks #4: The 20,000-pound air-ride Goose Box uses an airbag, dual shocks and rubber springs for buyers towing a fifth wheel with a gooseneck ball.
A gooseneck-ball connection replaces the need for a conventional fifth-wheel hitch, while the Goose Box’s air bag, dual shocks, and rubber springs cushion the ride. Its 20,000-pound capacity suits buyers seeking this connection style with air-ride components housed inside the pin box.
The Goose Box attaches to the fifth-wheel trailer and connects to a gooseneck ball, offering a different hitch workflow from a conventional fifth-wheel hitch. Inside the box, the air bag, dual shocks, and rubber springs provide the stated air-ride cushioning. The 20,000-pound maximum capacity gives buyers a clear load limit, and listed fitments include Lippert 1621, 1716, 0719, Rhino, and Fabex PB 600 Series. Check that the trailer’s pin-box pattern is among those listed.
- Connects to a gooseneck ball
- Air-ride system includes an air bag, dual shocks, and rubber springs
- 20,000-pound maximum capacity
- Lists Lippert, Rhino, and Fabex fitments
- The listed fitments are limited to specified Lippert, Rhino, and Fabex pin-box families.
Skip it if you need a stated 24,000-pound rating; the Shocker Hitch Quick Air Ride for Lippert 1621 and 0719 (B0DVRZL7QY) lists that GTW.
This is for fifth-wheel owners whose trailer matches a listed pin-box family and whose towing setup uses a gooseneck ball. Its 20,000-pound maximum and gooseneck connection are key boundaries when checking application suitability.
Full product details
| Brand | REESE |
|---|---|
| Compatible with Vehicle Type | Trailer, Truck |
| Included Components | 94920 |
| Item Weight | 220 pounds |
| Manufacturer | Reese |
| Part Number | 94920 |
| Manufacturer Warranty Description | Lifetime |
| Material | Alloy Steel |
| Model Number | 94920 |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: This product can expose you to chemicals including styrene which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov |
Listed on Amazon as: Reese 94920 Goose Box 5th Wheel Pin Box, Air Ride 20,000 lbs. Capacity, Fits Lippert (1621, 1716, 0719, Rhino), Fabex PB 600 Series
View on Amazon#5
5. CURT L05 Air Ride 18K
- Weight: 105.23 kg
- Material: Alloy Steel
- Compatible with Vehicle Type: Trailer
Best for: 18K fifth-wheel comfort.
Why it ranks #5: Its air bag and rubberized compound buffer road shock, but its 18,000-pound rating is lower than the other listed capacities.
An integrated air bag paired with a durable rubberized compound buffers road shock between the tow vehicle and coach. That two-layer cushioning targets vibration, jarring motion, and the vertical tug-of-war that can make fifth-wheel towing uncomfortable, while the 18,000-pound rating defines its load ceiling.
The internal air bag absorbs road shock and vibration, while the rubberized compound adds another buffer against jarring motion. Together, these features address both the impact felt through the tow vehicle and the movement transferred to the RV. Its 18,000-pound load capacity makes the rating a key selection boundary: buyers should match it to their trailer’s requirements. The supplied information identifies it as a trailer pin box, but does not specify a vehicle-mount fitment range.
- Integrated air bag buffers road shock and vibration
- Rubberized compound adds protection from jarring motion
- Targets chucking and vertical tug-of-war
- 18,000-pound load capacity is specified
- Its 18,000-pound capacity limits it to loads within that rating.
Skip it if you need a 21,000-pound rating; the Lippert Components CURT L05 Air Ride 21K (B00JMHFIPO) has the higher stated capacity.
Choose this pin box if your fifth-wheel setup falls within its 18,000-pound rating and you want air-bag and rubberized-compound cushioning. Confirm the application matches your trailer; the supplied details do not list specific mounting patterns.
Full product details
| Brand | Lippert Components |
|---|---|
| Color | Black |
| Compatible with Vehicle Type | Trailer |
| Included Components | Pin Box |
| Item Dimensions | 42 x 16.25 x 19.5 inches |
| Item Weight | 105.23 kg |
| Load Capacity | 18 ,000 lbs |
| Manufacturer | Lippert Components |
| Part Number | 328492 |
| Manufacturer Warranty Description | 1 Year |
| Material | Alloy Steel |
| Model Number | 328492 |
| Style Name | Long Jaw |
| Additional Information | Important Information Proposition 65 Warning for California Consumers WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov |
#6
6. Shocker Quick Air Ride 1116
- Weight: 123.5 lb
- Compatible with Vehicle Type: 12.5" Wide Pin Box (Also Fits M19 Rota-Flex…
Best for: 24K FabEx-pattern replacement.
Why it ranks #6: This 24,000-pound assembly includes a replacement pin box and air hitch with kingpin, but fitment is limited to a different listed pattern group.
This Shocker package pairs a replacement pin box with an air hitch and kingpin, and lists a 24,000-pound gross trailer weight rating. Its fitment list targets Lippert 1116 and 0115, several FabEx patterns, and RBW7028, providing a pattern-specific air-ride replacement for bed-hitch towing.
The included replacement pin box and Shocker air hitch with kingpin work with a bed-mounted fifth-wheel hitch, keeping that connection arrangement in the described setup. Fitments include Lippert 1116 and 0115, FabEx 500, 503, 520, 530, and 560, and RBW7028; it also lists 12.5-inch-wide pin boxes and M19 Rota-Flex. The product states installation in minutes and reduced towing stress and wear. Pin box bolts are excluded, so they are not part of the included installation components.
- 24,000-pound GTW rating
- Includes replacement pin box and air hitch with kingpin
- Lists Lippert 1116, 0115, FabEx, and RBW7028 fitments
- Specified to work with a bed fifth-wheel hitch
- Pin box bolts are not included.
Skip it if you have a Lippert 1621 or 0719 pattern; the Shocker Hitch Quick Air Ride B0DVRZL7QY lists those fitments instead.
This model fits buyers with one of its listed Lippert, FabEx, or RBW patterns who tow using a bed fifth-wheel hitch. Verify the named pattern and account for excluded pin box bolts before planning installation.
Full product details
| Brand | Shocker Hitch |
|---|---|
| Compatible with Vehicle Type | 12.5" Wide Pin Box (Also Fits M19 Rota-Flex (Doesn't Fit 1716), 5th Wheel Camper, Fits Lippert 1116 0115 FabEx500 503 520 530 560 RBW7028 |
| Included Components | Air Ride Hitch with Kingpin, Does Not Include Pin Box Bolts, Pin Box for 5th Wheel Camper |
| Item Weight | 123.5 pounds |
| Manufacturer | Shocker Hitch |
| Part Number | SH-800-KP-SH-GPB-Plates-X |
| Manufacturer Warranty Description | Shocker Hitch Guarantee & 1 Year Warranty Policy. This Product Does Not Void Your Camper Warranty. The Magnuson-Moss Act 15 U.S.C. § 2302(c) prohibits companies who provide warranties for their products from disclaiming the warranty when a consumer uses a different company’s product in connection wi |
| Model Number | SH-800-KP-SH-GPB-Plates-X |
Listed on Amazon as: Shocker Quick Air Ride 5th Wheel Pin Box with Kingpin, Fits Lippert 1116 0115 FabEx500 503 520 530 560 RBW7028-24,000 lbs GTW
View on AmazonAvoid the pin-box fitment trap
The main compatibility risk is buying by capacity or brand name without matching the trailer’s existing pin-box pattern. The listings distinguish several fitment groups: the Shocker Quick Air Ride 1621 lists Lippert 1621, 0719, RhinoBox, FlexAir, Rota-Flex and L05; the Shocker Quick Air Ride 1116 lists Lippert 1116 and 0115, several FabEx models and RBW7028. The Reese 94920 lists Lippert 1621, 1716, 0719 and Rhino, plus Fabex PB 600 Series.
These are not interchangeable merely because they share a capacity figure or air-ride feature. Before ordering, identify the current pin-box model and compare it against the specific product’s fitment statement.
The Shocker listings also say pin-box bolts are not included, so check what installation hardware your setup requires. When a fitment detail is unclear, verify it with the manufacturer or trailer documentation rather than assuming a match.
Choose the right air-ride arrangement
Air-ride pin boxes and gooseneck couplers solve different truck-side connection needs. The Lippert and CURT L05 listings describe replacement pin boxes for conventional fifth-wheel arrangements, while the Shocker Quick Air Ride products include a replacement pin box and an air hitch with kingpin that works with a bed fifth-wheel hitch. By contrast, the Reese Goose Box is specifically for owners who want to tow with a gooseneck ball.
That can avoid using a conventional fifth-wheel hitch, but it is not simply a capacity upgrade for an existing setup. The Goose Box’s 20,000-pound capacity, airbag, dual shocks and rubber springs should be considered alongside its connection type and specified pin-box fitment.
Pick the design around the truck’s installed connection and trailer’s approved configuration first; then compare capacity and cushioning features. A product that does not match that arrangement is the wrong choice regardless of its advertised rating.
How to Choose an Air-Ride Fifth-Wheel Pin Box
Match capacity to your trailer
Look for a listed capacity that meets the requirements of your trailer and towing setup, without treating capacity as proof of fitment. This group ranges from the CURT L05 Air Ride 18K at 18,000 pounds through the Reese 94920 Goose Box at 20,000 pounds and the Lippert and CURT 21K models, up to both Shocker options at 24,000 pounds GTW. A buyer whose verified requirements are within 18,000 pounds can consider the 18K option if its pattern matches.
Those needing a higher listed rating can compare the 21K or 24,000-pound products, while checking the exact terminology and fitment. The trailer’s actual requirements and compatible hardware should decide; do not select a pin box on the largest number alone.
Verify the mounting pattern
Look for an explicit match to the model or pattern of the pin box currently on your trailer. The listings show how much fitment varies: the CURT L05 Air Ride 21K says it replaces Lippert 1621; the Shocker Quick Air Ride 1621 lists several patterns including 1621, 0719 and RhinoBox; and the Shocker Quick Air Ride 1116 lists 1116, 0115 and multiple FabEx models. The Reese 94920 names Lippert, Rhino and Fabex series compatibility.
Choose the product with a verified match to your trailer, not simply a similar brand or capacity. If your current model is unknown or absent from the listing, pause to confirm it with the trailer manufacturer or product maker before ordering.
Choose the connection and cushioning design
Look for a design that suits your truck’s hitch arrangement and the kind of movement you want to buffer. The Lippert L05 Flex Air 21K lists an air bag, oil shock, rubberized compound and pivoting head; the CURT L05 Air Ride 18K lists an internal airbag and rubberized buffer. The Shocker units combine a replacement pin box with an air hitch and kingpin for use with a bed fifth-wheel hitch, while the Reese Goose Box is for a gooseneck ball and lists an airbag, dual shocks and rubber springs.
Buyers keeping a conventional bed fifth-wheel hitch should compare compatible pin-box replacements or the Shocker assembly. Buyers specifically towing from a gooseneck ball should assess the Goose Box, provided its fitment is confirmed.
Which air-ride fifth-wheel option should you choose?
For a conventional replacement pin box with several listed cushioning elements, choose the Lippert L05 Flex Air 21K, our Best Overall. If you need a 21,000-pound option that explicitly replaces a Lippert 1621, consider the CURT L05 Air Ride 21K. For a listed 24,000-pound GTW rating and a compatible 1621-family pattern, the Shocker Quick Air Ride 1621 is a candidate; verify your exact pattern first.
The Reese 94920 Goose Box suits buyers whose truck connection is a gooseneck ball and whose trailer matches its stated fitment. The CURT L05 Air Ride 18K is the lower-capacity listed choice.
The Shocker Quick Air Ride 1116 serves a different pattern group. In every case, match the pin-box model, connection type and required capacity before ordering.
Frequently Asked Questions
How do I identify my fifth-wheel trailer’s pin-box model and mounting pattern?
Check the pin box for a model or part number, then compare its mounting pattern with your trailer documentation and the replacement product’s fitment information. If the identification is unclear, ask the trailer or pin-box manufacturer or a qualified installer to verify the exact pattern before ordering.
How should I set air pressure and maintain an air-ride pin box?
Use the pin-box manufacturer’s instructions for the pressure setting; do not rely on a generic value. Follow the specified inspection and maintenance steps, checking the air bag, shock, fittings and mounting hardware for damage or leaks. If pressure will not hold or a component looks damaged, seek qualified service.
Will an air-ride pin box fit my truck’s fifth-wheel hitch and bed setup?
Confirm both the trailer-side mounting pattern and the truck-side connection type. Most pin boxes connect to a fifth-wheel hitch, while the Reese Goose Box is intended for a gooseneck-ball connection. Check your hitch and bed arrangement against the product’s stated fitment, and get confirmation if any detail is uncertain.
How much capacity should I look for in a replacement pin box?
Choose a pin box whose stated capacity is suitable for your trailer and towing requirements, and verify that its mounting pattern also matches. A higher rating alone does not establish fitment. The listed options include different capacities, so confirm the required rating in your trailer information before selecting a product.
What should I verify before ordering a pin box listed for a family of patterns?
Treat a family name or list of compatible patterns as a starting point, not confirmation that every trailer in that group will fit. Compare your exact pin-box model and mounting pattern with the product listing, and contact the manufacturer or a qualified installer if the listing does not resolve your application.
Final Words
For a conventional replacement, the Lippert L05 Flex Air 21K is the leading choice for its listed combination of air bag, oil shock, rubberized compound and pivoting head, provided its pattern and capacity match your trailer. Consider the CURT 21K for a stated 1621 replacement, or other options when their connection and fitment suit your setup. Verify the exact pin-box model, pattern, connection type and required capacity before ordering.
