A strong air ride pin box should match your fifth-wheel’s mounting pattern and weight requirements while cushioning road shock and controlling chucking. The Lippert L05 Flex Air 21,000 lbs stands out for pairing an air bag with an oil shock, rubberized buffer, and pivoting head. This roundup compares six options, from 18,000- and 21,000-pound Lippert designs to a Shocker package listed at 24,000 pounds.
Compatibility is not universal: some products name specific replacement pin boxes, and one is restricted to Rhino Box designs. Check the trailer’s existing pin box model and required capacity before choosing.
The listed weight ratings and fit claims help narrow the field, but the product data does not establish compatibility with every fifth-wheel or hitch setup.
The Lippert L05 Flex Air 21,000 lbs is the leading choice for buyers seeking an air ride pin box with several listed motion-control features. It combines an air bag, oil shock absorber, rubberized compound, and pivoting head, and is rated for 21,000 pounds. Its blend of cushioning and rebound control makes it the strongest all-around option in this group, provided its mounting configuration and rating suit your trailer.
Confirm fitment against your existing pin box before ordering.
Our Top Picks
Best OverallIts 21,000-pound rating combines an air bag, oil shock absorber, rubberized buffer, and pivoting head to address shock, rebound, and fore-aft movement.
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Best 1621 ReplacementRated for 21,000 pounds, this Air Ride model specifically replaces the Lippert 1621 pin box and uses an internal airbag with a built-in strut.
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Highest CapacityIts listed 24,000-pound GTW rating leads the group, and it includes a replacement pin box and Shocker air hitch with kingpin for specified fitments.
View on Amazon- Best 18K Option Lippert L05 Flex Air 18K
Compare These Fifth-Wheel Air Ride 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. Lippert L05 Air Ride 21KBest 1621 Replacement | 170 lb | Alloy Steel | Truck, SUV | View on Amazon |
| 3 | 3. Shocker Quick Air RideHighest Capacity | 113 lb | Air Ride System, Outer Material (Powder… | 12" Wide Pin Box (Also Fits Helux), 5th Wheel… | View on Amazon |
| 4 |  4. Lippert L05 Flex Air 18KBest 18K Option | 105.23 kg | Alloy Steel | Trailer | View on Amazon |
| 5 | 5. Lippert M19 Air Ride 21KMulti-Fit 21K Air-Ride Upgrade | 158 lb | — | — | View on Amazon |
| 6 |  6. Lippert Rhino Box Air RideRhino Box Bolt-On Replacement | 155 lb | — | — | View on Amazon |
Detailed Reviews: Best Air Ride Pin Box For 5Th Wheel
#1 · Best Overall
1. Lippert L05 Flex Air 21K
- Weight: 243 lb
Best for: Rebound-Control Flex Air System.
Why it ranks #1: Its 21,000-pound rating combines an air bag, oil shock absorber, rubberized buffer, and pivoting head to address shock, rebound, and fore-aft movement.
An oil shock absorber handles rebound while an air bag absorbs road shock, giving the Lippert L05 Flex Air two distinct damping elements. Its pivoting head and rubberized compound add further motion-control features, aimed at reducing fore-and-aft movement, kickback and jarring between a fifth-wheel RV and tow vehicle.
The air bag buffers road shock and vibration, while the oil shock dampens rebound and controls kickback and chucking; this division of work addresses both impact and follow-up motion. A pivoting head helps reduce fore-and-aft movement, and the rubberized compound adds another buffer against jarring. The 21,000-pound model measures 42 by 16.25 by 20 inches and weighs 243 pounds, useful details for planning replacement handling and space.
- Oil shock absorber dampens rebound
- Air bag buffers road shock and vibration
- Pivoting head reduces fore-and-aft movement
- Rubberized compound adds a buffer against jarring
- Its listed item weight is 243 pounds.
Skip it if you want a lighter listed pin box; Lippert Components CURT L05 Air Ride 18K weighs 105.23 kg, though its rating is lower.
This fits buyers prioritizing multiple motion-control elements for a 21,000-pound fifth-wheel setup, including rebound damping and a pivoting head. Its 243-pound listed weight is an important handling consideration during replacement.
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. Lippert L05 Air Ride 21K
- Weight: 170 lb
- Material: Alloy Steel
- Compatible with Vehicle Type: Truck, SUV
Best for: 1621-Replacement Air-Ride Option.
Why it ranks #2: Rated for 21,000 pounds, this Air Ride model specifically replaces the Lippert 1621 pin box and uses an internal airbag with a built-in strut.
An internal airbag paired with a built-in strut gives the Lippert Components CURT L05 Air Ride a two-part shock-buffering setup, helping reduce road vibration and chucking while towing. Its 21,000-pound capacity and stated replacement for Lippert 1621 pin boxes make it a fit-focused option for owners seeking air-ride cushioning.
The internal airbag buffers road shock between truck and coach, while the built-in strut helps control chucking; together, those features target vibration and jolting during a tow. The 21,000-pound rating identifies its stated capacity, and the Lippert 1621 replacement specification narrows the relevant pin-box fit. Alloy-steel construction and a black powder-coat finish are listed, and the 170-pound item weight is worth considering when planning the replacement installation.
- Internal airbag buffers road shock and vibration
- Built-in strut helps control chucking
- 21,000-pound capacity
- Replaces Lippert 1621 pin boxes
- Its stated replacement fit is Lippert 1621 pin boxes.
Skip it if you have a different pin-box design; Lippert Components CURT 155943 lists several replacement fits, including LCI 1116.
Choose this for a fifth-wheel owner with a Lippert 1621 pin box who wants airbag-and-strut cushioning and a 21,000-pound rating. Its stated replacement fit is specific, so the existing pin-box design matters.
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
- 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: Broad 1621-Series Compatibility.
Why it ranks #3: Its listed 24,000-pound GTW rating leads the group, and it includes a replacement pin box and Shocker air hitch with kingpin for specified fitments.
A replacement pin box supplied with its own Shocker Air Hitch kingpin makes the Shocker Quick Air Ride a complete pin-box-and-kingpin package for a bed fifth-wheel hitch. Its listed compatibility spans Lippert 1621, 0719, RhinoBox, Flexair, Rota-Flex and L05 designs, with a 24,000-pound gross trailer weight rating.
The included air hitch with kingpin works in conjunction with a bed fifth-wheel hitch, while replacing the factory pin box; that combination gives buyers a defined towing setup rather than a pin box alone. Shocker lists compatibility with several Lippert designs, including 1621, 0719, RhinoBox, Flexair, Rota-Flex and L05, making the fit range a central selection point. Powder-coated steel and urethane bump cushions are also specified.
- Includes replacement pin box and Shocker Air Hitch with kingpin
- Listed 24,000-pound GTW rating
- Fits several listed Lippert pin-box designs
- Urethane bump cushions
- Pin box bolts are not included.
Skip it if you need pin-box bolts in the package; Lippert Components 807710 lists a hardware kit with its Rhino Box-compatible air-ride pin box.
This suits buyers seeking a replacement pin box and kingpin together for use with a bed fifth-wheel hitch, especially among its listed Lippert fits. Account for the separately sourced pin-box bolts during installation planning.
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 · Best 18K Option
4. Lippert L05 Flex Air 18K
- Weight: 105.23 kg
- Material: Alloy Steel
- Compatible with Vehicle Type: Trailer
Best for: 18K Flex Air Motion Control.
Why it ranks #4: The 18,000-pound model adds an air bag and rubberized compound to buffer shock and reduce chucking, suiting buyers whose required rating is lower.
An integrated air bag and pivoting head combine to buffer road shock and reduce chucking and vertical tug-of-war in the Lippert Components CURT L05 Air Ride 18K. A durable rubberized compound adds another buffer against jarring motion, while the 18,000-pound capacity sets its operating boundary.
The air bag absorbs road shock and vibration between the tow vehicle and coach, while the pivoting-head design is described as reducing chucking and vertical tug-of-war. A durable rubberized compound adds a buffer against jarring, complementing the air ride rather than relying on one feature alone. Its 18,000-pound load capacity and long-jaw style are useful selection constraints, and the listed dimensions are 42 by 16.25 by 19.5 inches.
- Integrated air bag buffers road shock and vibration
- Pivoting head helps reduce chucking
- Rubberized compound buffers jarring motion
- 18,000-pound load capacity
- Its listed load capacity is 18,000 pounds.
Skip it if you need a higher listed capacity; Lippert Components CURT 155943 M19 Air Ride Pin Box is rated for 21,000 pounds.
Choose this for a fifth-wheel setup within its 18,000-pound capacity where airbag buffering, a pivoting head and a rubberized buffer address towing motion. Capacity and long-jaw style are relevant fit considerations.
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 |
#5
5. Lippert M19 Air Ride 21K
- Weight: 158 lb
Best for: Multi-Fit 21K Air-Ride Upgrade.
Why it ranks #5: This 21,000-pound Air Ride pin box replaces several listed LCI models, including 1621, 1716, 0719, and 1116 configurations.
An air bag that buffers the tow vehicle from the coach is the central feature of the Lippert Components 155943 M19 Air Ride Pin Box, intended to absorb road shock and vibration. Its 21,000-pound capacity and listed replacements for several popular LCI pin boxes make it a broad-fit option for compatible fifth-wheel setups.
The air bag acts as a buffer between truck and coach, helping absorb road shock and vibration while improving ride quality and reducing driver fatigue. Its stated replacement list covers LCI 1621, 1716, 0719 and 1116 configurations, including specified jaw variants, which helps owners compare an existing pin box with the listed fits. The product includes a pin box and weighs 158 pounds, details relevant to replacement planning.
- Air bag buffers road shock and vibration
- Listed to improve ride and reduce driver fatigue
- Replaces several popular LCI pin-box configurations
- 21,000-pound capacity
- The listed capacity is 21,000 pounds.
Skip it if you need a capacity above 21,000 pounds; Shocker Hitch Quick Air Ride lists a 24,000-pound GTW rating.
Consider this for a fifth-wheel owner whose existing pin box matches one of its listed LCI configurations and who wants airbag buffering. Its 21,000-pound rating is a key boundary when assessing the towing setup.
Full product details
| Brand | Lippert Components |
|---|---|
| Color | Black |
| Included Components | Pin Box |
| Item Weight | 158 pounds |
| Manufacturer | Trailair® |
| Part Number | 155943 |
| Model Number | 155943 |
Listed on Amazon as: CURT Lippert Components 155943 M19 Air Ride Pin Box, 21K (Replaces LCI 1116 Pin Box), Black, Medium Jaw (21,000 lbs. Capacity)
View on Amazon#6
6. Lippert Rhino Box Air Ride
- Weight: 155 lb
Best for: Rhino Box Bolt-On Replacement.
Why it ranks #6: It offers an internal airbag, built-in strut, and bolt-on installation, but the listing restricts replacement compatibility to Rhino Box designs and gives no capacity.
Bolt-on installation with no assembly required is a defining convenience of the Lippert Components 2020 Air Ride pin box. Its internal airbag and built-in strut absorb shock and vibration, while the listed compatibility boundary is explicit: this replacement is only compatible with Rhino Box pin-box designs.
The bolt-on installation and no-assembly listing simplify the stated installation process, while the internal airbag and built-in strut work to absorb road shock and vibration during towing. Steel construction and a black powder-coat finish are specified, with the coating described as protection against rust. At 155 pounds and 36 by 18 by 15 inches, the unit also has concrete handling and space requirements for replacement planning.
- Bolt-on installation
- No assembly required
- Internal airbag and built-in strut absorb shock and vibration
- Steel construction with black powder-coat finish
- Compatible only with Rhino Box pin-box designs.
Skip it if you do not have a Rhino Box design; Lippert Components CURT 155943 lists replacements for several LCI pin-box configurations.
This is for a Rhino Box owner wanting a bolt-on air-ride replacement with no assembly required. Its exclusive stated compatibility with Rhino Box designs makes verifying the existing pin-box type essential before choosing it.
Full product details
| Brand | Lippert Components |
|---|---|
| Item Weight | 155 pounds |
| Item model number | 807710 |
| Manufacturer | Lippert |
| Part Number | 807710 |
| Model | 807710 |
| Dimensions | 36 x 18 x 15 inches |
Listed on Amazon as: LIPPERT COMP PINBOX 2020 AIRRIDE W/HDWR KIT
View on AmazonAvoid a pin box fitment mismatch
A fitment mismatch can make an otherwise suitable air ride pin box unusable, so identify the existing pin box model before selecting by capacity alone. The listings show how specific these claims can be: the Lippert L05 Air Ride 21K replaces a Lippert 1621, while the M19 Air Ride 21K lists replacements for 1621, 1716, 0719, and 1116 pin boxes. The Shocker Quick Air Ride lists compatibility with Lippert 1621, 0719, RhinoBox, Flexair, Rota-Flex, and L05 configurations, but its package also includes a pin box and air hitch with kingpin.
The Rhino Box Air Ride listing says it is only compatible with Rhino Box designs. Compare your current pin box label and mounting arrangement with the selected model’s fitment details, and verify the complete combination with the manufacturer or seller if the listing is unclear.
Air cushioning and rebound control differ
Air ride designs can combine cushioning with different ways of managing movement, so an airbag alone does not describe every product’s approach. The L05 Flex Air 21K explicitly lists an oil shock absorber for rebound, a rubberized compound for additional buffering, and a pivoting head intended to reduce fore-aft movement. The L05 Air Ride 21K and Rhino Box Air Ride instead describe an internal airbag with a built-in strut, while the M19 Air Ride 21K highlights its air bag as a buffer against road shock and vibration.
These design descriptions indicate different feature sets, not measured comparative performance. Consider which motion concerns matter in your towing setup, then weigh those features against fitment and capacity.
More listed components are only useful if the pin box fits and suits the trailer’s required rating.
How to Choose a Fifth-Wheel Air Ride Pin Box
Rated capacity
Choose a pin box whose listed capacity suits your trailer and towing requirements, and do not treat the highest number as automatically best. This selection includes 18,000 pounds for the Lippert L05 Flex Air 18K, 21,000 pounds for the L05 Flex Air 21K, L05 Air Ride 21K, and M19 Air Ride 21K, and 24,000 pounds GTW for the Shocker Quick Air Ride. The Rhino Box Air Ride listing does not state a capacity, so its rating needs confirmation before purchase.
Buyers with requirements within the 18,000-pound range can consider the 18K model; those requiring a higher listed rating should compare 21K or 24K options, while verifying how the rating applies to their setup.
Mounting and replacement fit
Match the pin box to the existing mounting configuration and confirm the exact replacement claim before ordering. The L05 Air Ride 21K replaces Lippert 1621; the M19 Air Ride 21K lists several replacements, including 1621, 1716, 0719, and The Shocker Quick Air Ride lists compatibility with multiple named designs, including 1621, 0719, RhinoBox, Flexair, Rota-Flex, and L05, while the Rhino Box Air Ride is explicitly limited to Rhino Box designs.
Buyers replacing one of the named models can start with those stated fitments. If the existing pin box model is unknown or absent from a listing, identify it and verify fitment rather than assuming that a similar capacity guarantees compatibility.
Suspension and motion-control features
Compare the listed suspension components to decide which kinds of movement the design is intended to address. The L05 Flex Air 21K combines an air bag with an oil shock for rebound control, rubberized compound, and pivoting head; the L05 Air Ride 21K describes an internal airbag and built-in strut. The 18K Flex Air highlights an air bag and rubberized compound, while the M19 Air Ride emphasizes its air bag buffer.
Shocker’s package includes an air ride hitch with kingpin as well as a replacement pin box. Buyers looking for explicitly listed rebound and pivoting-head features should examine the 21K Flex Air; those seeking the simpler airbag-and-strut description can compare the L05 Air Ride or Rhino Box model, subject to fitment.
Which Air Ride Pin Box Should You Choose?
For a 21,000-pound option with the broadest set of explicitly described motion-control features, choose the Lippert L05 Flex Air 21K, ranked first. If your existing pin box is a Lippert 1621 and you want an airbag-and-strut design, the Lippert L05 Air Ride 21K is a direct listed replacement. Buyers seeking the highest stated capacity can consider the Shocker Quick Air Ride, listed at 24,000 pounds GTW, but should verify the combined package and fitment.
For an 18,000-pound requirement, the Lippert L05 Flex Air 18K is the specific lower-capacity choice. The Lippert M19 Air Ride 21K lists several replacement models.
Choose the Lippert Rhino Box Air Ride only if the Rhino Box restriction fits and its capacity is confirmed.
Frequently Asked Questions
How do I identify which pin box mounting pattern my fifth wheel uses?
Check the label or documentation for your existing pin box and compare its mounting pattern and model with the replacement’s listed fitment. If those details are unclear, contact the trailer or pin-box manufacturer with your trailer information. Confirm the configuration before ordering; a product’s capacity alone does not establish that it will fit.
How should I determine the pin box capacity needed for my loaded fifth wheel?
Use the loaded fifth wheel’s relevant pin-box requirements and compare them with the capacity stated for the replacement. Do not select by capacity alone: the mounting configuration must also match. The listed options here include 18,000-, 21,000-, and 24,000-pound ratings, but verify the rating and fitment for your specific trailer.
What maintenance does an air ride fifth-wheel pin box require?
Follow the maintenance instructions for the specific pin box and inspect it regularly for visible damage or changes in operation. Pay attention to the air bag, shock or strut, and mounting points where those components are present. If you notice a problem, consult the manufacturer’s guidance before towing rather than assuming adjustment or repair steps.
How can I confirm a replacement pin box will fit my trailer?
Compare the replacement’s stated fitment with the model and mounting configuration of your current pin box before ordering. For example, the listed L05 Air Ride is described as a direct replacement when the existing pin box is a Lippert When fitment is uncertain, verify it with the manufacturer using your trailer details.
Does choosing the pin box with the highest stated capacity guarantee it is the right option?
No. The Shocker Quick Air Ride is listed at 24,000 pounds GTW, but its stated capacity does not confirm that it suits every trailer or package. Check the applicable capacity requirement and mounting fitment, and verify the combined package as advised in the article before choosing it.
Final Words
For the broadest set of listed motion-control features, the L05 Flex Air 21K is the leading choice when its rating and mounting configuration suit your trailer. Match the pin box to your existing mounting pattern and required capacity first. Consider the Shocker for its listed 24,000-pound GTW only after verifying package and fitment; choose the 18K option when that rating meets your requirement.
Confirm compatibility before ordering.
