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Expert Answers about Fifth Wheel King Pin


  • Reese Sidewinder or 5th Airborne Sidewinder for Forest River Sabre 37FBT
  • Your Forest River Sabre 37FBT has a 1621 pin box, so you will want the 5th Airborne Premium 5th Wheel Air Ride King Pin w/ Sidewinder and Turret - 16,000 lbs # RP61422 for an air ride option or the Reese Sidewinder 5th Wheel King Pin with Rotating Turret - 20,000 lbs # RP34FR.
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  • Comparing the 18K and 21K Lippert 1621 Flex Air 5th Wheel Pin Boxes
  • The Trailair Flex Air 5th Wheel Pin Box part # LC369535 which is rated for 21,000 lbs is constructed of a thicker metal and also has beefier welds when compared to the Trailair Flex Air 5th Wheel Pin Box part # LC328492 which is rated for 18,000 lbs. The air bag and shock that is used in each of them are the same. The thicker metal and welds are what gives the former a higher weight capacity. The best option for you would be the one that meets the GVWR of your trailer though you could go...
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  • Does Reese Goose Box Move Trailer Closer to Truck
  • A Reese Goose Box is not going to move your trailer closer to your Dodge Ram 2500. For example, as you can see by the accompanying photos the Reese Goose Box # RP94720 measures about 18-1/2 inches from the first bolt holes to the center where the ball attaches while the pin box it replaces, the Lippert 1621 # LC1191191 pin box it replaces measures a very similar 17-3/4 inches from the first bolt holes to the center of the king pin. To determine what the correct Reese Goose Box is for...
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  • Is Trailair Air Ride Pin Box Compatible with Demco Hijacker Autoslide Hitch
  • Trailair Air Ride 5th Wheel Pin Box # LC158778 is fully compatible with Demco Hijacker hitches such as the 18K # DM8550034 and 21K # DM8550035 which fit short beds fitted with standard above-bed base rails like Demco kit # DM8552025-71. You'll also want to use the Demco Capture Plates for Trailair Pin boxes # DM6171. Pin box part # LC158778 is a correct fit to replace a Lippert 1621HD 5th wheel pin box. This direct replacement will bolt right up in place of the 1621HD and give a smoother...
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  • How to Determine Fifth Wheel Pin Box Model
  • If you are unable to contact your trailer's manufacturer with your VIN to find the factory pin box model number there are some steps you can take which will allow you to determine what pin box model you have so you can purchase a new FlexAir. To do this you will need to follow the steps in the linked help article, which I will go over with you. Start by selecting your pin box style like in the accompanying photo (which you will also find in the help article). You will then need to use...
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  • Sidewinder and Fifth Wheel Hitch Recommendation for New Ram Towing Vilano 5th Wheel
  • Since your 5th wheel trailer has a Lippert 1621 pin box there is a Reese Sidewinder that will fit it as part # RP34FR. This will allow a short bed truck like yours to make tight turns but you'll have to have a fifth wheel hitch installed in the factory rail kit. For that the best option is the B and W Companion hitch part # BWRVK3600 with the custom wedge part # SWW-06. This hitch with the Sidewinder will give you the best fifth wheel towing setup around! The Companion is very easy to...
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  • Replacement Pin Box for a 2012 Jayco Eagle 5th Wheel Trailer
  • I spoke to my contact at Lippert and they informed that they did not start keeping a record of pin boxes until 2013. Therefore, the only way you are going to be able to identify what bolt pattern you have is by measuring the mounting holes using the attached photo. The most common bolt pattern is a 1621 which measures as follows: 2a: 7-7/8" 2b: 2" 2c: N/A 2d: 5/8" 2e: 15/16" 2f: 6 3a: 17-3/4" 3b: 25-5/8" 3c: 12" If your measurements match these then the correct Trailair Flex...
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  • Cushioned Sidewinder Recommendation for Grand Design Solitude Fifth Wheel
  • The type of pin box that your Grand Design Solitude has is a Lippert 1621 so for a cushioned Sidewinder to allow the needed turning clearance since you have a fixed hitch you'd want the part # RP61422 and you'd be set.
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  • Best 5th Wheel Hitch for Sidewinder on 2020 Ford F-350 Short Bed With Factory Prep Package Pucks
  • Let's go ahead and start with the best 5th wheel hitch for your 2020 Ford F-350 short bed with the factory prep package to use with a Sidewinder, which is the B&W Companion OEM 5th-Wheel Hitch for Ford Super Duty Prep Package # BWRVK3300. This hitch - which has a 20,000 lb capacity - is considered by most to be the best 5th wheel hitch on the market because of its immense jaws and cushioned bushings, which combine to give you the most comfortable and quiet towing experience possible....
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  • Is Sidewinder Pin Box Compatible with Curt A16 Fifth Wheel Hitch
  • Sidewinders can work with the Curt A16 fifth wheel hitches. One of the reasons Curt redesigned their Q series hitches was so that the new version (A Series) would be compatible with the Sidewinders. You'll just need the correct A-Series wedge part # RP31016 and your hitch will be ready to go. Sidewinders are pin box specific so you will first need to know what pin box you have now in order to pick out the correct one. There should be a sticker or a stamping on the OEM pin box of...
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  • How Often Should 5th Airborne Sidewinder be Serviced
  • Great question! The Reese Sidewinder like part # RP61422 has fairly easy maintenance in that Reese calls for lubricating parts of the pin box before each trip and then disassembling it at least once per season to clean and inspect everything. You'll probably be hearing some noise when the pin box is rotating but unless it is alarmingly loud I wouldn't worry about it. If you go to disassemble the pin box and it looks like some things need to be repaired then you can use the Repair...
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  • Ride Quality Of Reese Goosebox Versus Lippert Trail Air Rota-Flex and B&W Companion 5th Wheel Hitch
  • Given the choice between the Reese Goose Box and the Trail Air Rotaflex like the # LC328330 you'd looked at, I'd recommend the Goose Box for better ride quality. The Rota-Flex offers a pivoting foot plate that provides resistance against chucking, but it lacks an airbag, so any bouncing the front end of your fifth wheel does will be transferred directly to the truck. The Goose Box features dual shock absorbers to prevent chucking as well as an adjustable air bag to absorb the shock from...
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  • Which Trailair Rota-Flex Pin Box Compatible with Lippert 1621 Pin Box
  • I have a solution for you, but the Trailair Rota-Flex # LC176440 pin box is designed to replace 5th wheel trailers with a Lippert 1116 pin box and not the 1621 pin box. Instead, you'll want to use either the # LC328330 (trailer with GVWR of less than 18000-lbs) or the # LC328329 (trailer of GVWR less than 21000-lbs). The Trailair Rotaflex is a great solution to help reduce the bouncing and jarring that car be experienced with an uncushioned pin box and will be a great upgrade for your towing...
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  • Reese Sidewinder to Replace Lippert 1621 Pin Box
  • What you have is the Lippert 1621 5th Wheel Pin Box - 15,500 lbs # LC1191191, and there are two options for a Sidewinder, depending on if you want just the extra clearance the Sidewinder provides or the clearance plus the improved ride a cushioned Sidewinder gives. - Sidewinder 5th Wheel King Pin with Rotating Turret - 20,000 lbs # RP34FR - 5th Airborne Premium 5th Wheel Air Ride King Pin with Sidewinder and Turret - 16,000 lbs # RP61422 I have added links to video reviews and...
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  • Which Reese Goose Box Fifth Wheel Adapter Fits 2015 Heartland Cyclone 4100HD
  • From previous customers with your same trailer we know that your 2015 Heartland Cyclone 4100 HD came with a Lippert 1621 pin box so then for a Goose Box replacement you'd want the # RP94720 which has a 20k capacity of the part # RP94716 which has a 16k capacity. I looked up the GVWR of your trailer and determined it's 18k so you'd need the higher capacity # RP94720.
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  • Cushioned Pin Box Recommendation for 2019 Keystone Fusion Impact 359
  • The mounting bolt dimensions are the same between a Lippert 1116 and a 1716 pin box so the # DM8250018 will bolt up either way. The difference is the length of the pin box. The 1116 is considered a medium length pin box and is about 7 inches shorter in length horizontally. The 1716 Demco Glide Ride will bolt up and could work well but it's going to be a bit longer. Some pin box manufacturers list 1116 and 1716 box replacements as the same part number but Demco does not. Added length could...
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  • Best Pin Box Upgrade Recommendation for 2017 Grand Design Momentum with a 1621 Pin Box
  • For your 2017 Grand Design Momentum that has a Lippert 1621 pin box the best upgrade we have is the Trailair Flexair part # LC328492. This has cushioning vertically and a pivoting king pin plate that allows for cushioning front to back as well. This will give you a noticeable smoother ride quality than what you currently have.
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  • Recommended Gooseneck Adapter for 1621 Pin Box
  • Your 2012 Forest River XLR I believe has a 1621 pin box. You can confirm this by looking at the stickers on your current pin box or measuring the bolts as shown in the attached article. The Reese Goose Box Fifth-Wheel-to-Gooseneck Adapter # RP94720 is an air ride replacement rated for 20,000 lbs and would be my recommendation. Another option is the Gen-Y Hitch Shock Absorbing 5th Wheel to Gooseneck Adapter Pin Box # 325-GH-8045 rated for 18,000 lbs. If you end up not having the...
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  • Will the Reese Sidewinder 5th Wheel King Pin Work With a 2020 Ford F-150 5-1/2' Bed
  • Yes, the Reese Sidewinder 5th Wheel King Pins will work with a 2020 Ford F-150 with 5-1/2' bed. In fact, it is one of the only options which will allow for full ninety degree turns. Please note, in order to choose the correct one you need to know the pin box type (Lippert 1621, 1716, 1116, etc). If you have a 1621 then use part # RP34FR or if you have a 1716/1116 then use part # RP77FR. If you don't already have a 5th wheel hitch picked out, I recommend the B&W Patriot 5th Wheel Trailer...
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  • Fifth Wheel Hitch and Sidewinder Recommendation for 2017 Ram 1500 5-1/2 Bed
  • The Max Turn Technology feature of your Keystone Cougar basically is a narrower nose that allows better clearance with short bed trucks. But since your truck bed is 5-1/2 feet you still would need a Sidewinder as the added clearance is not going to be quite enough. Your trailer should have a Lippert 1621 pin box so the correct Sidewinder would be the part # RP34FR. I'd still recommend verifying the pin box since you didn't mention the model of your Cougar. For a fifth wheel hitch you'd...
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  • Will Lippert Trail Air LC158777 Pin Box Provide More Clearance than Existing Trail Air Rota-Flex
  • According to Lippert, the Rota-Flex was never available as a replacement for the 1716 pin box, are you sure you don't have one that's a replacement for a 1116? The Lippert 1716 and 1116 share the same bolt pattern, but the 1716 is 6-1/2 inches longer and would provide more clearance. If you'll look at the diagram I provided, you can see the bolt spacing that the 1716 uses. You can compare that to your existing Rota-Flex, and if they're identical you could certainly use the # LC158777...
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  • Which Sidewinder is a Replacement for Lippert 1621 Pin Box with 15,500 lb Capacity
  • Thanks for that info! What you have is a Lippert 1621 pin box, and we do have two Sidewinders that will work as replacements for you. - Sidewinder 5th Wheel King Pin with Rotating Turret # RP34FR - 5th Airborne Premium 5th Wheel Air Ride King Pin w/ Sidewinder and Turret # RP61422 The latter will give you the same benefit as the standard Sidewinder in regards to turning radius, but the additional benefit of a much improved, smoother and more comfortable towing experience due to...
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  • Should Pin Box or Suspension be Upgraded to Reduce Jarring and Bouncing While Towing
  • A cushioned pin box, like the Trailair Flex Air 5th Wheel Pin Box # LC328492 for a Lippert 1621 replacement that you referenced, will greatly improve the ride between your 2016 Ram 3500 and your Forest River Chaparral 37FL whereas upgraded suspension parts on your trailer are geared more towards the ride quality of your trailer. If the jarring that you are getting is from the trailer bouncing around then I recommend starting with suspension enhancement. From the info you gave it sounds...
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  • How Important Is The Shock Line on the Trailair Flex Air 5th Wheel Pin Box
  • I spoke to my contact at Lippert about the issue you are having with the Trailair Flex Air 5th Wheel Pin Box like part # LC369535 on your 2011 Ford F-350. They stated that the arrow on the shock is just a reference point and not something that you should really use as your absolute guide as they have had issues with the sticker being misplaced. The reason that the ride is so rough is that you are at near max psi of the airbag which is 120 psi. They recommend that you adjust the pressure...
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  • Is the Lippert 1621 an Extended Pin Box
  • The extended notation you have mentioned for the Lippert 1621 5th Wheel Pin Box part # LC1387883 is in regards to the style. This is also know as the "long" style and there are several other pin boxes with this style that have similar dimensions but they are not designed to move the king pin. If you take a look at the attached photo and help article that should then make things a bit more clear. The only way this extended/long style will move the kingpin further out is if you were using...
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  • Are Replacement Parts Available for the Trailair Air Ride 5th Wheel Pin Boxes
  • The reason that you cannot find the replacement shaft is because Lippert does not offer this separately. If the shaft is worn or damaged then it is time to replace the pin box. There are only very minimal replacement parts for these pin boxes (valve part # LC156740, shock part # LC177223, airbag part # LC432404) and this is intentional to discourage home repairs on such a critical component. That said, this might be a good to time to upgrade from the Trailair Air Ride 5th Wheel Pin...
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  • Can I Use the Mopar M20 5th Wheel Hitch with a Reese Sidewinder?
  • Unfortunately the Mopar M20 hitch you have is the same hitch as the Curt Q20 # C16130 hitch, which has a spherical axial bearing to improve the pivoting of the hitch head; because of this 360-degree pivot, it is not compatible with a pivoting pin box like the Reese Sidewinder # RP61421. It is not possible to lock out the head with any type of wedge, so there would be two pivot points in the towing setup, which would not work. Because of the shorter bed in your 2019 Ram 3500, you do need...
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  • Wedge for Reese M5 Fifth Wheel Hitch and Sidewinder in 2019 GMC Sierra 3500HD
  • I spoke with a representative of Reese who said that the Reese M5 5th Wheel Trailer Hitch # RP30890 does not have a custom wedge. The Sidewinder # RP61421 comes with a universal wedge, part # 201100 that you will use with your hitch. This is a great set up you have chosen for you 2019 GMC Sierra 3500HD; the Reese M5 hitch will fit directly into the puck system of your truck and has a unique jaw system called a "Talon" which is a single-piece jaw that will wrap fully around your Sidewinder's...
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  • Pin Box to Gooseneck Adapter for 2005 Wildcat 27RLWB
  • Long bed trucks typically don't need any help with cab to trailer nose clearance. What made you think you'd need more clearance? And what type of gooseneck adapter were you wanting to use?
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  • Replacement Trailair Flex Air Pin Box for 2021 Keystone Montana 3120RL
  • In order to choose the correct Trailair Flex Air pin box like the # LC328492, or any other pin box for that matter, is by checking the spec sticker on the current pin box for a model number. We don't have a database that tells us what pin box is on specific trailers, so you would need to either find the number on the sticker/plate or you can take some measurements of the bolt patterns to determine which one you've got. I've linked a brief article that explains this process. The Trailair...
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  • Is There an 18K Trailair Air Ride Pin Box for the Lippert 1621HD on a Forest River Vengeance 295A18
  • The Lippert 1621 and Lippert 1621HD Pin Boxes are very similar and can be used in place of one another if you drill out the lower front hole on each side of the trailer wings which is very easy to do. The difference between the two has to do with the mounting holes and weigh ratings. Therefore, if you do the above you can use the Trailair Flex Air 5th Wheel Pin Box part # LC328492 which is rated for 18,000 lbs or you can just use the Trailair Air Ride 5th Wheel Pin Box part # LC158778 as...
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  • Will Lippert 1621 and Lippert 1621HD Pin Boxes Fit Same Mounting Wings
  • If you have the standard Lippert 1621 you do need to replace it with the Lippert 1621 5th Wheel Pin Box # LC1191191. The reason is the mounting holes on the wings on the 1621 are slightly different than the Lippert 1621HD 5th Wheel Pin Box # LC1191151.
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  • Recommended Replacement Pin Box for Lippert 182209 1621 on 2010 KZ Durango LX
  • I reached out to my contact at Lippert and you do have the 1621 pin box on your 2010 KZ Durango LX. If you are looking for a cushioned pin box, I recommend the Trailair Flex Air 5th Wheel Pin Box - Lippert 1621 - 18,000 lbs # LC328492 or the 21,000 lb # LC369535. Either of these will work well and they not only have the air ride but also have a rubber compound and moving head to be the fist defense against road shock and chucking. If you desire greater turning clearance, then the 5th...
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  • Best Option to Provide More Turning Radius on a 2015 Ford F350 Super Duty Pulling a 5th Wheel
  • We have a solution for this but just replacing the turret is not going to give you the extra space you are looking for. If you are looking to just replace your pin box I recommend Sidewinder 5th Wheel King Pin with Rotating Turret - 16,000 lbs Item # RP61410. This pin box gives you a little extra space. Out of these options I most recommend the Demco Hijacker Autoslide 5th Wheel Hitch w/ Slider - Single Jaw - Ford Super Duty Prep Package - 18K Item # DM8550024. This gives you the...
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  • Why is Reese Sidewinder Pin Box Not Compatible with Curt Q Series Hitch?
  • The rotating pin boxes like the Sidewinder Fifth Wheel King Pin with Rotating Turret by 5th Airborne, 16K # ST400-5AS16K are not compatible with the Curt Q series hitches because of the hitch head design that had a unique spherical axial bearing. That system allowed too much movement for any of the rotating pin boxes to be compatible. If you already have a Q series hitch, I recommend simply changing the head of the hitch with the Curt A series 16K # C16520 or 20K # C16540. Either...
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  • Replacement Pin Box With Air Bag for Lippert 1716 Demco Glide Ride Pin Box
  • Thanks so much for the photos and measurements, and we do have an excellent upgrade option for your Demco Glide Ride and it looks like you had a Lippert 1716 pin box, so you will need an upgrade that is designed as a replacement for the 1716. The cushioned pin box with an air bag that will work as a replacement is the Trailair Air Ride 5th Wheel Pin Box - Lippert 1716 # LC158777. The Air Ride is going to greatly improve the overall comfort of your ride because it has both an air bag...
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  • How To Gain Vertical Clearance On A 5th Wheel Hitch And Pin Box That Is Hitting The Tailgate
  • If you have your Trailair Flex Air 5th Wheel Pin Box - Lippert 1621 - 18K # LC328492 adjusted to its lowest position and the 5th wheel hitch is adjusted all the way up and you still don't have the necessary clearance, then you will need to look into a new 5th wheel hitch that will be compatible with your setup. The Demco Hijacker UMS Double Pivot 5th Wheel Hitch # DM8550033 fits your 2021 Ford F-350 if it has the factory puck system. This has a hitch height: 16" - 19", which is the tallest...
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  • Will Replacing a Lippert 1116 Pin Box With a Lippert 1716 Pin Box Give More Room To Lower Tailgate
  • The longer (Lippert 1716 part # LC1324791) pin box will give you more clearance to open your tailgate than the shorter (Lippert 1116 part # LC1270271) pin box so if more room is what you are looking for then the Lippert 1116 Pin Box part # LC1324791 fits the bill.
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  • Are Spacers Needed for 5th Airborne When Replacing Lippert 1716 5th Wheel Pin Box
  • You will not need additional spacers when replacing your Lippert 1716 pin box with the 5th Airborne Premium Fifth Wheel Air Ride Coupler # 5AB-E510-710. This is a replacement that won't require any additional parts, and will give you a much more comfortable towing experience because of its air spring and ability to absorb shock to reduce chucking, jarring, and vibration. I have added a link to the installation instructions for you to check out as well of the 5th Airborne Premium Fifth...
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  • Flex Air Replacement Shock Availability
  • It's hard to see the dent in the picture you submitted so it's harder to say but it looks like it's probably fine. I'd probably take it on a short trip around the block keeping and eye on it and see if it works like it should. If you find you need a replacement you'd want the part # LC177223.
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  • Can the Trailer Still Be Towed With the Trailair Air Ride 5th Wheel Pin Box If the Air Bag Fails
  • If the airbag inside of the Trailair Air Ride 5th Wheel Pin Box part # LC158777 fails which is very rare then it would be best to have a backup on hand, the Replacement Air Spring for Trailair 5th Wheel Pin Boxes part # LC432404 that way you can replace this roadside because it is only held in place with three nuts/bolts so it should be rather easy. We also have the Replacement Shock for Trailair Air Ride and Flex Air 5th Wheel King Pins part # LC177223 but this is not as critical to have...
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  • Cushioned Pin Box to Replace Lippert 1716 Pin Box
  • There is a cushioned pin box that is a great replacement for a Lippert 1716, but there isn't a Flex Air, so the model you asked about won't fit. Instead, the correct cushioned pin box for a Lippert 1716 is the Trailair Air Ride 5th Wheel Pin Box # LC158777. The Air Ride is similar to the Flex Air with the exception that the Air Ride doesn't have a pivoting head. The Air Ride is still going to give you a much improved ride over your standard pin box due to its air bag that will greatly...
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  • Can a 2020 Ram 2500 with Rambox Tow Fifth Wheel Trailer
  • There is a way to to a fifth wheel trailer with your 2020 Ram 2500 that has the Ramboxes but you have to install a Sidewinder pin box on the trailer so that the pivot point is raised up high enough that there isn't interference between the pin box and the truck bed rails when turning. If you check out the picture I attached you can see what I mean. Sidewinders are pin box specific so you will first need to know what pin box you have now in order to pick out the correct one. There...
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  • Fifth Airborne Pin Box Replacement for 43 Dutchmen Voltage Toy Hauler
  • Since your serial number start with 028 you have a Lippert 1621HD pin box. Since your trailer weighs 21k you'd need then the 21k 5th Airborne for the 1621HD pin box replacement part # 5AB-E1621-610. I attached an install video for this pin box for you to check out as well.
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  • Sidewinder Pin Box that Can Replace Lippert 0719
  • We do have a cushioned version of the Sidewinder pin box with the part # RP61422 which is a fit for the Lippert 0719 that you have but the kit you mentioned is not a fit. I attached a couple install videos for this for you to check out as well.
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  • Trail Air Flex Air Replacement for Lippert 1621 OEM 5th Wheel Pin Box
  • The pin box shown in the photo you provided (thanks for that, by the way!) does indeed show a Lippert 1621 OEM pin box. The Lippert # LC369535 Flex Air you'd looked at is the correct replacement for a Lippert 1621 OEM pin box. However, since your OEM pin box only has a 15.5K capacity, there's really no reason to spend more for the 21K version. I'd recommend saving a few bucks and going with the 18K version, part # LC328492 which would still work perfectly for you. I've linked to a...
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  • Difference Between the Lippert Flex Air and Air Ride Pin Boxes
  • The difference between the Trailair Flex Air # LC369535 and the Trailair Air Ride # LC158778 is that the Flex Air has a pivoting head that is designed to help reduce chucking. Aside from that they both have the air bag and the shock to help improve ride quality. Attached are some review videos that you can check out.
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  • Correct Trailair Flex Air 5th Wheel Pin Box for a 2020 Beacon Vanleigh 39GBB
  • The correct Trailair Flex Air 5th Wheel Pin Box for a 2020 Beacon Vanleigh 39GBB is part # LC328492.
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  • Which Cushioned Sidewinder Fits 2019 Grand Design Reflections 303RLS
  • Your 2019 Grand Design Reflections 303RLS uses a Lippert 1621 pin box so the correct cushioned Sidewinder is the part # RP61422. We've verified this with Grand Design.
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  • Replacement Pin Box Options for a Keystone Challenger
  • The method you have selected of calling the trailer manufacturer is the most accurate in regards to determining the correct replacement pin box so this I would trust. There are a few options you have to replace your pin box, a standard pin box like the Lippert 1621 5th Wheel Pin Box part # LC1387883 or a cushioned pin box like the Trailair Flex Air 5th Wheel Pin Box part # LC369535. The Trailair Flex Air 5th Wheel Pin Box is gong to do wonders for ride quality as well as reducing the...
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  • 5th Airborne Pin Box Replacement for 2007 35 ft Challenger 5th Wheel
  • Our part # 5AB-E510-710 is exactly the part number you are looking for. This is a cushioned 5th Airborne pin box designed to fit several common pin box styles like the: Fabex (500, 503, 765, and 770) Lippert (1716) RBW (7028)
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  • Will the Trailair Flex Air 21K Pin Box for Lippert 1621 Work On an 18K GVWR Trailer
  • Yes, the Trailair Flex Air 5th Wheel Pin Box part # LC369535 which is rated for 21,000 lbs will work just fine on a trailer with Lippert 1621 Pin Box and 18,000 lb gross vehicle weight rating (GVWR). The gross vehicle weight rating is the most the trailer can weigh fully loaded so you will never exceed the weight capacity of the pin box and even have a few thousand lbs of wiggle room.
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  • Pin Height Difference Between 5th Airborne Premium Fifth Wheel Air Ride Coupler and Lippert 1621
  • The 5th Airborne Premium Fifth Wheel Air Ride Coupler part # 5AB-E1621-610 measures about 6" from the bottom of the skid plate to the lowermost mounting hole which will be the same if not very similar to that of the Lippert 1621 OEM. Therefore, the height will remain the same so you don't have to worry about the nose of the trailer sitting too high. The dimensions of the 5th Airborne Premium Fifth Wheel Air Ride Coupler are mirrored to the Lippert 1621 OEM. I have attached a photo with...
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  • How Tall Is the Reese 5th Airborne Sidewinder 61422 And Will It Replace a Lippert 1621 Pin Box
  • I was able reach out to my contact at Reese and come up with some dimensions on the 5th Airborne Sidewinder # RP61422, but he was not able to provide me with complete measurements on this. However, he did say that this is an exact replacement of a Lippert 1621 pin box so the dimensions, including length and width will be almost completely the same. I've added a photo with a technical drawing that shows the height from the bottom of the lowest point on the front of the pin box to the top...
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  • 5th Airborne Sidewinder and Warranty on Trailer
  • In terms of warranty for the king pin, the 5th Airborne Sidewinders do have their own 3-year warranty. As for frame damage, a Sidewinder is not going to cause any damage to the frame so long as you use it with a compatible hitch on your 2018 Ford F-250. Some fifth wheel hitches are not compatible with a Sidewinder because the pivot point gets changed to the Sidewinder's turret, but if you have the right fifth wheel hitch there is no reason to be concerned that your trailer's frame will...
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  • How to Reduce Chucking When Towing 2019 Keystone Fusion with Lippert 1116 Pin Box
  • For the Lippert 1116 pin box replacement the best cushioned option is the Trailair part # LC155943. This system uses an air bag and shock to cushion and dampen the movement of the pin box which will do a great job smoothing out your ride quality. Another really big factor with fifth wheel chucking is the fifth wheel hitch jaw system. If you have a hitch that allows a lot of movement in the hitch jaws then that's where most of the chucking is coming from. You'd want a hitch that has...
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  • Solution for Worn Out Curt Q24 Hitch Head
  • Just the top section of the Curt Q24 hitch head is not replaceable. The torn up condition you found it to be in is one of the reasons they upgraded the Q Series to the A Series as people found that the heads of the Q Series were prone to the type of damage you described. Best option would be the A25 hitch head unit replacement part # C16580 which gives you a tougher head design and also a better jaw design that will hold the king pin of the trailer tighter.
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  • 5th Airborne Sidewinder Pin Box Compatibility with 2018 Forest River Rockwood Signature Ultra Lite
  • Your 2018 Forest River Rockwood Signature Ultra Lite 8295WS came with a 1621 pin box. The 5th Airborne Premium 5th Wheel Air Ride King Pin w/ Sidewinder and Turret - 16,000 lbs # RP61422 you asked about is a perfect fit for your trailer. If you let me know what hitch you are using, there may be a custom fit wedge to make this an even better fit than the universal wedge that comes with the pin box.
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  • Dimensions of Trailair Air Ride Pin Box for Fabex 750, 765 and 770, & RBW 7028
  • I reached out to the manufacturer, Lippert, who was able to give me some of the dimensions you were looking for regarding the Trailair Air Ride 5th Wheel King Pin - Fabex 750, 765 and 770, RBW 7028 # UF35-946212. They didn't have the dimensions from the bolt holes, but were able to provide me with the spec sheet they did have, which shows the length, width, and height, which should be useful for you. As you can see by the accompanying cut out of the sheet, the Trailair Air Ride # UF35-946212...
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  • Replacing a SPB72-1621LD Pin Box with a Rota-Flex or a MORryde Pin Box with Chucking in Mind
  • If you're comparing the Tailair Rota-Flex that replaces a 1621 Lippert pin box, part # LC328330, with the MORryde equivalent (part # MR64VR for 5th-wheel trailers with up to 11,500-lb GVWR, and part # MR84VR for 5th-wheel trailers with 14,001 to 18,000-lb GVWR), then I recommend going with the Trailair. The Rota-Flex is built with chucking and road shock in mind, so it utilizes a pivoting head with a built-in rubber compound. The pivoting head allows for controlled movement of king pin...
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  • Difference Between Trailair Air Ride Pin Boxes That Replace Lippert 1716
  • The only difference between the two Trailair Air Ride Pin Boxes you asked about are the part numbers. The Trailair Air Ride 5th Wheel Pin Box # LC158777 is simply the updated part number from 155933. Both of these Air Ride Pin boxes are designed to replace Lippert 1716 pin boxes, have a 21,000 lb capacity and will provide you with a much smoother 5th wheel towing experience due to the cushioning the air bag provides.
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  • What is Recommended Torque for Pivot Bolt of Trailair Pin Box King Pin Plate
  • I checked with our contacts at Trailair and the correct torque figure for the pivot bolt of your Trailair pin box is 50 ft lbs.
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  • Can Curt A16 Head Replace Curt M20 for 2017 Ram With Puck System, and Sidewinder for Lippert 1116
  • Okay, there's quite a bit to unpack here so to make things easier I am going to take your questions one at a time. 1) Your Ram OEM M20 hitch is the same as the Curt Q20 Curt Q20 5th Wheel Trailer Hitch # C16530-16021; it uses the same legs so you can replace the head with the Replacement Head Unit for Curt A20 # C16540 or the Replacement Head Unit for Curt A16 # C16520. 2) The Sidewinder Wedge Kit for Curt A16 Fifth Wheel Trailer Hitch # RP31016 is correct for the A16 or you can...
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  • Compatibility of Andersen 5th Wheel Ultimate Connection With Lippert Trail Air Air Ride Pin Box
  • Thanks for the photo! I had Lippert run the serial number from the photo, and was told that you have a Lippert 1621 pin box. The compatible Trail Air Flex Air cushioned pin box is part # LC328492 for an 18K or # LC369535 for a 21K capacity. However, the Andersen Ultimate 5th Wheel Connection isn't compatible with the Flex Air without using a Rotaflex lock out kit, part # 3247 which is available from Andersen. Another alternative would be to use the standard Trail Air, which is # LC158778...
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  • Is Trailair Flex Air Compatible With B&W Companion Slider on 2018 Ford F-350 With Puck System
  • The Trailair Flex Air 5th Wheel Pin Box # LC369535 is absolutely compatible with the B&W Companion OEM 5th Wheel Trailer Hitch with Slider for Ford Towing Prep Package # BWRVK3370. The Companion slider is not compatible with pin boxes that change the pivot point of the king pin - rotating pin boxes - but is compatible with cushioned pin boxes that provide a better ride. The Flex Air is also going to provide benefit to you even though your 2018 F-350 has the Firestone Ride-Rite Red Label...
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  • Best 5th Wheel Trailer Hitch for Turning Clearance for a 2015 GMC Sierra 1500 Short Bed
  • There are a couple of ways you can get increased clearance between the truck cab and the 5th wheel trailer when making tight turns. In your picture it doesn't look like you have a hitch yet so the most cost effective solution is going to be a sliding 5th wheel hitch. I recommend a Demco HiJacker auto-sliding hitch. That way you don't have to get in and out of the truck to operate the sliding mechanism. I assume that your 2015 GMC Sierra 1500 is a short bed but it is the really short...
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  • How To Choose Pin Box Replacement Without a Sticker On Pin Box
  • Since trailer manufacturers do not make information like pin box models readily available to the public, you will need to contact the dealership with the serial number and they should be able to tell you what pin box is on it. Otherwise, the only other way besides a sticker is taking a few measurements. I have attached an article explaining how to measure your pin box to figure out which replacement is suitable.
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  • Replacement Pin Box Compatible with Atwood AT75700 Mounting Bolts
  • Unfortunately I don't have a cross-reference for that pin box. I've attached a help article for you to measure the bolt holes that mount it to determine what pin box replacement options you have. I've also linked the page to all your options to assist.
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  • Initial Air Pressure Setting for Trailair Flex Air 5th Wheel Pin Box LC328492
  • In an air-cushioned 5th wheel pin box like # LC328492 the amount of air pressure is to a degree up to the preferences of the driver. There is no one set correct pressure for all circumstances. 5th wheel trailer designs vary, and so do their pin weights, so it is usually best to adjust these by feel rather than by a particular spec. Your initial pressure setting can be based on the yellow sticker on the shock, which has an arrow to indicate a good starting point. Please have a look at...
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  • Is There a 5th Airborne Cushioned Pin Box that Fits Coachmen Chaparral RKS 27
  • Yes, for your Coachmen Chaparral RKS 27 that has a Lippert 1621 pin box you can replace it with a 5th Airbone Pin Box part # 5AB-E1621-610 which was designed to fit as an exact replacement for the Lippert 1621 pin box you have. I attached an install video for this pin box for you to check out as well.
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  • How To Determine If The Trailer Will Be Level After Installing the Trailair Flex Air Pin Box
  • The Trailair Flex Air 5th Wheel Pin Box part # LC369535 is an excellent option for an upgraded pin. In regards to dimensions, these will be similar to the pin box it replaces as the pin boxes that fit this bolt pattern are all relatively the same dimensions. If you have concerns of towing level then there are adjustments you can make to both the hitch and pin box. In order to be certain you will be level once everything is installed, it would be a good idea to measure this before hand....
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  • Fifth Wheel Hitch Solution for Truck with Service Body Bed and Gooseneck Hitch
  • Installing a fifth wheel hitch can be challenging on a service body truck since the frames are different and there aren't rail kits made specifically for them. But are you really having a gooseneck hitch installed? That's a totally different setup than a 5th wheel but it's easy to confuse them.
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  • Fifth Wheel Setup Is Too Tall With TrailAir Flex Air Pin Box and B&W Hitch
  • The B and W Fifth Wheel hitches for your 2020 Chevy Silverado 3500 with OEM prep package like part # BWRVK3710 for the 20K or part # BWRVK3715 for the 25K are height adjustable so if you can lower the hitch and still be level, I recommend to try that first. You also want 6" of clearance between the trailer loft and the top of the bed rails. Around 11-1/2" is the recommended height in most states because of bridges but if you are conscious about how tall the trailer is, it is up to...
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  • Pin Box Upgrade Replacement for 2019 Keystone Raptor 424 Toy Hauler
  • The Trailair you have now is our part number # LC158778 which is a different fit from the # LC155943 you referenced. If you were looking to replace the pin box you have we have the upgraded Flex Air part # LC369535 with same 21k capacity but has additional cushioning over the standard Trailair. The Flex Air has a pivoting king pin plate that is cushioned so you end up with forward and back cushioning as well as up and down like the Trailair you have now.
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  • 5th Wheel Air Ride and Sidewinder That Will Replace Lippert 1116 Pin Box
  • Thanks for that information and based on that I can tell you exactly what you need. I reached out to Lippert with your pin box serial number and they told me that your 2015 Keystone Fuzion 325 pin box is a Lippert 1116 model. The correct replacement for a Lippert 1116 is the 5th Airborne Premium 5th Wheel Air Ride King Pin with Sidewinder and Turret # RP61412. You have made a really good choice because this pin box is not only going to give you the comfort of never having to use...
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  • Best Air Ride Pin Box Replacement for the Reese Revolution on Rockwood Signature Ultra-Lite Trailer
  • Your Rockwood Signature Ultra-Light with Reese Revolution Kingpin is compatible with the air ride replacement 5th Airborne Premium 5th Wheel Air Ride King Pin w/ Sidewinder and Turret - 16,000 lbs # RP61422. This will give you the same turning function but will help with the shock absorption you are seeking for a smoother ride. If you prefer a fixed king pin, you can instead use the Trailair Flex Air 5th Wheel Pin Box - Lippert 1621 - 18,000 lbs # LC328492 which won't provide the additional...
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  • Should a Reese Sidewinder Arm be Level Once Installed on a Trailer
  • You would want the arm on a Sidewinder, # RP34FR to be level to that the trailer is towed level. The first thing I would do is go back and make sure that the arm is connected to the turret and torqued down according to the specs in the instructions linked for reference. I did speak with my contact at Reese and he stated that if it is off level by a few degrees that it will not be a problem, especially if the factory pin box was off level. He also stated that you should not elongate any...
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  • Troubleshooting Reese 5th Air Borne Pin Box Air Bag Mounting
  • The Reese 5th Airborne Premium Fifth Wheel Air Ride Coupler # 5AB-E510-710 you asked from is what I can only assume is what you are asking about. This pin box will have two bolts on the bottom that are tight to the air bag and yet designed to be guide pins and free moving to the bottom plate according to my tech contact at Reese. The air bag is held in place by the top two bolts that should be torqued to spec. I've attached a photo of the installation instructions to assist.
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  • Trailair Air Ride Pin Box Replacement for 1116 Pin Box on 2019 Keystone Montana
  • The correct Trailair Air Ride pin box to replace the 1116 on your 2019 Keystone Montana is the part # LC155943 which is rated for up to 21,000 lbs. I'm not sure where you're seeing that much of a savings because the replacement Trailair Air Ride for a 1716 is part # LC158777 and is priced pretty similarly. When I've reached out to manufacturers in the past they have said that the pin box needs to be an exact replacement and it has everything to do with the design and leverage of the...
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  • Measuring a Factory 5th Wheel Trailer Pin Box to Find a Replacement Air Ride Pin Box
  • Trailair Air Ride 5th Wheel Pin Box # LC155943 fits in place of a Lippert 1116 pin box so if that is what is on your 2005 Montana 5th wheel trailer this air ride pin box can be used. If there is no sticker or plate on the pin box indicating the manufacturer and model number of the pin box then there are some measurements you can take to determine which pin box you have. I have included a link to a help article that explains the measurements needed.
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  • Can Curt Q20 Fifth Wheel Hitch be Used with Sidewinder Pin Box
  • The Q20 hitches from Curt cannot be used with Sidewinders as the heads and jaws are not compatible. This is one of the reasons Curt actually redesigned the Q series as the A series so that the hitches could be used with a Sidewinder. So you are going to have to replace your hitch, and since the Sidewinder will prevent you from needing a slider hitch you may as well go with the fixed A20 part # C16140 instead. This will be much lighter weight and less moving parts since it's a fixed...
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  • Is Replacing 5th Wheel Pin Box Needed to Lower Nose of Trailer
  • Replacement pin boxes aren't the ideal solution for lowering the nose of a fifth wheel trailer. Most are all made to provide the exact same height. You might be able to remove your current one though and bolt it back in place using higher mounting holes which would give you a lowered trailer nose. Ideally you have at least 6 inches of clearance from the trucks bed rails and the overhang of the trailer. Other options for leveling the trailer would include raising the trailer suspension...
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  • Towing a 2018 Keystone Fuzion 424 Toy Hauler with a 2015 Ram 3500 Short Bed
  • Using a Reese Sidewinder with a B and W Companion hitch is the perfect setup for towing your 2018 Keystone Fuzion 424 Toy Hauler with your 2015 Ram 3500. Though you have a short bed (6-1/2 foot), I recommend the Companion without the sliding feature, part # BWRVK3600. The reason you can use this one is because the Sidewinder has enough clearance to make up for the hitch not sliding. I've included a link to a video installation of this hitch. If, however, you decide to go with a pin...
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  • Bolt Hole to Skid Plate Height of 5th Airborne 5th Wheel Air Ride King Pin with Sidewinder 61452
  • I reached out to the manufacturer, who told me the 5th Airborne Premium 5th Wheel Air Ride King Pin with Sidewinder # RP61452 measured just over 13 inches from the center of the top bolt hole to the bottom of the skid plate. This is also the correct replacement for the Venture CJ13517 pin box so it will work for you as a replacement. The lowest height hitch you can use with this pin box is the 16 inch height of the B&W Patriot 5th Wheel Trailer Hitch # BWRVK3255 with B&W Custom...
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  • How to Identify MORryde Pin Box to Select Correct Replacement
  • The easiest way to identify your MORryde pin box is to locate the pin box model number, which should be written on a label on the pin box. For example, if your MORryde pin box has a part number like MORryde SPB72-1621LD, the 1621 in the number would indicate it was designed to replace a Lippert 1621 pin box, for which the correct air ride replacement would be Trailair Flex Air # LC328492 (18,000 lbs) or # LC369535 (21,000 lbs). If you cannot find this information or it isn't legible,...
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  • Pin Box Upgrade for 2020 VanLeigh Beacon 39 FBB For Best Turning Clearance
  • For best clearance the Sidewinder part # RP34FR is the way to go as it moves the pivot point back 22-1/2 inches as you go to make turns. Now for vertical clearance between the bed rails and trailer overhang that comes down to the height of the hitch installed and what height it would take for the trailer to sit level. You ideally need the trailer to sit as level as possible and also have at least 6 inches between the rails and trailer overhang. This height is not dependent on the king pin...
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  • What Fifth Wheel and Sisewinder can I use with my 2016 Ram 2500 with RamBox
  • The Sidewinder 5th Wheel King Pin with Rotating Turret part # RP61421 is one of the more common Sidewinder's we offer. To know if it will fit your XLR Boost I would need the numbers off of the current pinbox to be able to tell for sure or I could possibly contact Forest River with the VIN if you have it. Rest assured though even if this isn't the right part number for you camper there will be a Sidewinder that will fit. As for the fithe wheel the B&W Companion OEM 5th Wheel Hitch for...
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  • Do I Need To Install a King Pin After Removing Gooseneck Adapter from 5th Wheel Pin Box
  • I would love to sell you a king pin but once you remove the gooseneck to fifth wheel adapter you have now, there will more than likely already be a kin pin installed underneath unless it was cut off which I doubt was the case. Please remove the adapter and let me know what you find. If you want to replace the entire king pin box please just let me know as we have options for that as well but we would need to know the pin box model number beforehand. In order to get the truck setup for...
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  • Using Air Ride 5th Wheel Hitch Together With Air Ride Pin Box
  • I've seen the Trailer Saver before, it looks like a great hitch but we don't have any personal experience with it. I've done some research though, and I can certainly see how a flexible linkage between the hitch and vehicle (air bags on the hitch) and a flexible linkage between the king pin and the fifth wheel (air bag in the pin box) could tend to amplify the chucking. I did some searching around, and really the only online opinions I can find pretty much mirror what Trailer Saver's...
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  • Which Wedge to Use with Sidewinder Pin Box and B and W Companion Hitch
  • The wedge needed for Sidewinders like the part # RP34FR with Companion hitches is part number # RP74FR .
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  • Sidewinder King Pin Replacement For Fifth Wheel Trailer With 1621 Pin Box
  • We offer three Sidewinders that can be used to replace the Lippert 1621 pin box on your trailer. If you have a 16,000-lb pin box, the Sidewinders we offer are part # RP34FR and part # RP61422. The # RP34FR is a standard Sidewinder with a rotating turret while part # RP61422 is the Premium Air Ride Sidewinder. The biggest difference is the # RP61422 has an air bag that reduces vertical shock by 44 percent and chucking by up to 60 percent. If you need a 19,000-lb king pin then the...
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  • Replacement for Sidewinder/5th Airborne RES61413 ST100-5AS02
  • We used to carry the part number you referenced but it was discontinued a while back. For a similar product we have the Reese Sidewinder and 5th Airborne # RP61412 which fits the same pin boxes as a replacement but has a lower capacity at 16k instead of 19.5k.
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  • Which Sidewinder Fits 2005 Yellowstone Montana 2955RL
  • From previous customers with your exact 2005 Yellowstone Montana 2955RL we know that the correct Sidewinder you need is the part # RP61410 since the type of pin box your 5th wheel came with was a Lippert 1716.
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  • Replacing Lippert 190737599 Pin Box On Trailer With Cushioned Trailair
  • I spoke with Lippert and they said it appears you have the Lippert 1116 or Lippert 1716 wing set but were not able to narrow it down any further. That said, all you need to do to determine this yourself is measure from the forward-most bolt holes to the center of the kin pin. If you get around 20" or so then you have a Lippert 1716 but if you only get around 15" or so then you have a Lippert 1116. They actually both have the same bolt pattern so you could use either really. For replacement,...
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  • TrailAir Air Ride Pin Box for a 2016 Dutchmen Voltage 3605 5th Wheel Trailer
  • I did some research and it looks like the 2016 Dutchmen Voltage 3605 comes with a Tri-Glide 21K pin box but it is unclear which specific model it is. There should be a sticker on the pin box that indicates which model it is such as an L05 or some other 3 character code. It is likely based on a Lippert 1621 or 1621HD pin box which would mean that # LC158778 would be the correct replacement. To be sure I would need to know that 3 character code on the pin box. If that is not available...
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  • Does Reese Revolution Rotating Pin Box Need to Be Locked Out When Towing With Long Bed Truck
  • Since you have a long bed truck, it doesn't really matter one way or the other if you lock out the Revolution/Sidewinder like the # RP34FR so the king pin rotates at the hitch, rather than the rotation happening occurring at the turret where the pin box meets the 5th wheel. If you wish to lock out the Revolution, follow the instructions I've screenshot for you. If it were me, I'd just leave things as they are now, since it makes no difference one way or the other. I've linked you...
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  • Which is Better Cushioned Pin Box for Lippert 1621 Replacement Sidewinder 5th Airborne or Flex Air
  • The FlexAir pin box part # LC328492 that is a replacement for your Lippert 1621 is the most cushioned option out there and will not add height to your trailer. Now that said the ultimate fifth wheel pin box replacement is the 5th Airborne/Sidewinder you also mentioned part # RP61422. The cushioning on this is one of the best options around and gives you the better turning clearances as well. Since it costs more and not a standard style of pin box we don't normally recommend it for people...
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  • 5th Wheel Hitch and Parts Needed to Tow 2014 Ram 2500 With RamBox
  • In order to tow a 5th wheel with a 2014 Ram 2500 with the RamBox cargo management you will need a Sidewinder in order to allow the proper clearances so the pin box does not hit the RamBoxes. To find the correct Sidewinder what you will need to know is the manufacturer and model number of the pin box on your fifth wheel and match that with the correct replacement, such as the Sidewinder # RP34FR. This will replace Lippert 0719, 1621 and 1621HD, Fabex 663 and 665, M&M 663 and 665, along...
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  • Sidewinder Pin Box Recommendation For 2006 Hoilday Rambler Savoy 29 ft. RKS
  • Thanks for all the info you gave me on your pin box! That makes picking out a Sidewinder very easy since I know you have the CJ 20517. Because of that you would want the Sidewinder part # RP61450 that you referenced as it is designed to fit the frame of your trailer exactly.
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  • Availability of Goosebox Upgrade or Adapter for Leland 7920 Pin Box
  • I have a solution for you, and from what I was able to determine, the Dexter 221-0023-00 has the same basic measurements as the Leland 7920 pin box. Unfortunately, I checked with Reese and they do not offer a Goosebox Coupler like the # RP94720 that is a replacement for the Leland 7920 pin box at this time. For that reason I recommend using the Convert-A-Ball Cushioned 5th Wheel to Gooseneck Adapter # CAB-C5G, which will allow you to tow your 2008 Jayco Recon Toy Hauler with a gooseneck...
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