1. Fifth Wheel King Pin
  2. Reese
  3. CJ13515
  4. CJ13517
  5. 221-0033-00
  6. 221-0031-00
5th Airborne Premium 5th Wheel Air Ride King Pin w/ Sidewinder and Turret - 16,000 lbs

5th Airborne Premium 5th Wheel Air Ride King Pin w/ Sidewinder and Turret - 16,000 lbs

Item # RP61452
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Fifth Wheel King Pin
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Shipping Weight: 179 lbs
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5th Airborne Sidewinder replaces your fifth-wheel trailer's king pin and alters the pivot point of your rig, enabling you to make up to 90-degree turns. Enclosed air spring in pin box absorbs shock and adjusts for a smooth ride. Call 800-298-8924 to order Reese fifth wheel king pin part number RP61452 or order online at etrailer.com. Free expert support on all Reese products. Guaranteed Lowest Price and Fastest Shipping for 5th Airborne Premium 5th Wheel Air Ride King Pin w/ Sidewinder and Turret - 16,000 lbs. Fifth Wheel King Pin reviews from real customers.
  • All Info
  • Reviews (2)
  • Q & A (24)
  • Photos
  • Why etrailer?

Reese Fifth Wheel King Pin - RP61452

  • CJ13515
  • CJ13517
  • 221-0033-00
  • 221-0031-00
  • Venture
  • Dexter
  • Reduces Bounce and Jarring
  • Reese
  • 16000 lbs GTW
  • Pin Box Upgrade
  • Cushioned
  • Rotating Turret

5th Airborne Sidewinder replaces your fifth-wheel trailer's king pin and alters the pivot point of your rig, enabling you to make up to 90-degree turns. Enclosed air spring in pin box absorbs shock and adjusts for a smooth ride.


  • 5th-Wheel trailer's pivot point is moved an extra 22" toward the rear of your tow vehicle so that you can easily make 90-degree turns, even with a short-bed pickup truck
    • No need to get out of your truck, throw a switch, push a button or mount a 5th-wheel slider
    • Trailer tracks more closely to the truck for better driveability
  • Fully enclosed, custom-tuned air spring in air ride trailer coupler - cushions and absorbs shock
    • Reduces longitudinal shock (chucking) by nearly 60 percent
    • Decreases vertical shock by 44 percent
    • Relieves stress on coach frame
    • Reduces vibration inside coach, protecting its contents
  • Air bag can be repositioned with 2 easy-to-access screws to better support varying loads
    • Move forward for light tongue weights
    • Move backward for heavy tongue weights
  • Sidewinder-and-turret assembly bolts onto your 5th-wheel trailer pin box
  • King pin connects to standard 5th-wheel trailer hitch and allows easy hookup and disconnect at any angle
  • Included locking wedge prevents king pin from rotating
    • Some 5th-wheel hitches may require custom wedge (sold separately)
  • 1-Piece, streamlined construction
  • C-Channel design of the Sidewinder provides more stability and strength than standard pin box
    • Able to support heavier loads


  • Designed for use with the following pin boxes: Venture CJ20517, CJ13515 and CJ13517
    • Also fits Dexter pin boxes: 221-0033-00 and 221-0031-00
  • Weight capacity: 16,000 lbs
  • Clearance: see formula below to ensure proper clearance
  • 3-Year limited warranty

Clearance Formula

Use the formula below to ensure that there will be enough space between your truck cab and trailer when you are executing a 90-degree turn with the 5th Airborne Sidewinder installed.

(A + B) - C = Clearance

A = Distance from center of 5th-wheel hitch jaw to truck cab in inches

B = Length of Sidewinder arm in inches (22")

C = Width of trailer in inches divided by 2

For example:

If you are using the 16,000-lb 5th Airborne Sidewinder, then B = 22"

If the distance from the center of your hitch to your truck's cab is 36", then A = 36"

And if your fifth-wheel trailer is 102" wide, then C = 51"

102/2 = 51


(36 + 22) - 51 = 7" of clearance

The 5th Airborne Air Ride Coupler with Sidewinder

16K 5th Airborne Sidewinder Diagram
  1. The rotating turret attaches to the pin box on your trailer to provide a new pivot point 22" behind the king pin.
  2. The rear mounted, heavy-duty shock absorber reduces chucking and relieves stress on your trailer frame.
  3. The air spring can be adjusted to provide a smooth ride for both your truck and trailer. Because it is fully enclosed, it's protected from UV exposure and shielded from road hazards.
  4. The reversible, adjustable king pin locking wedge (not pictured) prevents pivot at the 5th-wheel hitch.
  5. The king pin connects to the 5th-wheel trailer hitch in your truck bed.

Up to 90-Degree Turning

90 Degree Turns with 5th Airborne Sidewinder

It is now possible to turn your short-bed truck 90 degrees without having to worry that your trailer will collide with the cab of your truck. The universal king pin locking wedge included with this Sidewinder prevents your trailer from turning or pivoting at the fifth-wheel hitch. Instead, the rotating turret at the end of the Sidewinder allows turning and pivoting to take place an additional 22 inches away from the cab.

King Pin Locking Wedge Locations for Specific Hitches

5th Airborne Sidewinder Locking Wedges

1. Draw-Tite, Hidden Hitch and Reese (15K, 16K and 20K Select Series); Husky; Owens; Valley; and similar units

2. Reese Signature Series, Elite Series and similar units

3. Holland and similar units

A. Bolt locations

B. King pin

Custom King Pin Locking Wedges: The included universal wedge prevents the king pin from rotating in most fifth-wheel trailer hitches. Certain hitches, however, require a custom wedge (sold separately).

Note: Do not use the 5th Airborne Sidewinder with any of the following:

  • Curt Q5 5th-wheel trailer hitch
  • PullRite SuperGlide 5th-wheel trailer hitch
  • Reese Trail Boss 5th-wheel trailer hitch
  • B&W Companion 5th-wheel trailer hitches that mount in the Turnoverball gooseneck hole
  • Colibert 208BW 5th-wheel trailer hitch
  • Hi-Rise gooseneck-to-5th-wheel adapter by Draw-Tite, Hidden Hitch, Bulldog and Reese
  • Any other gooseneck-to-5th-wheel adapter

Note: It is recommended that if sitting idle longer than a week, the air springs be drained to relieve pressure on the system.

61452 (5AS16K and 61302) Fifth Airborne Side Winder Premium Fifth-Wheel Air-Ride Coupler

Replaces ST300-5AS16K

RP61452 Installation InstructionsInstallation Details RP61452 Installation instructions

Customer Reviews

5th Airborne Premium 5th Wheel Air Ride King Pin w/ Sidewinder and Turret - 16,000 lbs - RP61452

Average Customer Rating:  5.0 out of 5 stars   (2 Customer Reviews)

5th Airborne Sidewinder replaces your fifth-wheel trailer's king pin and alters the pivot point of your rig, enabling you to make up to 90-degree turns. Enclosed air spring in pin box absorbs shock and adjusts for a smooth ride.

- RP61452

Good value, eliminated the close clearance problem I had with a short bed. I highly suggest using a forklift to install... 734515

- RP61452

Nice pin box, I like the function with the trailer pivoting on the turret instead of the 5th wheel hitch. Fast shipping good prices on etrailer and as usual REESEā€™s good quality. 447226


Ask the Experts about this Reese Fifth Wheel King Pin

  • Solution for Sidewinder Pin Box that Doesnt Straighten Out Totally When Towed Behind Truck
    When we hear about the situation you described where the Sidewinder doesn't straighten totally out as it's being towed behind the truck and there is noise around corners the issue is that the wedge isn't the correct one for the hitch being used or it's not properly installed. What fifth wheel hitch does your customer have? Do you know which wedge they are using? Ideally you use a custom wedge like the # SWW-06 which is designed for the jaws of a B and W hitch.
    view full answer...
  • 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...
    view full answer...
  • Can a Sidewinder Pin Box be Used with a Sliding 5th Wheel Trailer Hitch on a 2008 Dodge Ram
    To use a Sidewinder pin box with a slider 5th wheel trailer hitch you just have to make sure that the slider stays locked in the towing position at all times. Do not slide it back when using the Sidewinder. Doing so will put extra stress on the truck and trailer. Also, some 5th wheel trailer hitches cannot be used with a Sidewinder. I have linked a help article that covers this for you.
    view full answer...
  • Adjusting a Dexter 221-0031-00 Pin Box on Jayco Trailer for Bed Clearance on 2019 GMC Shortbed
    On your 2012 Jayco Trailer, the Dexter pin box 221-0031-00 can simply be adjusted by removing the bolts as you stated and reinstalling them after adjusting the height. If you determine you want better turning clearance for your 6-1/2 foot bed on your 2019 GMC 3500, we have one pin box replacement that will assist. It is the 5th Airborne Premium 5th Wheel Air Ride King Pin w/ Sidewinder and Turret - 16,000 lbs # RP61452. This pin box will not only move the pivot point of your trailer...
    view full answer...
  • Sidewinder 5th Wheel Pin Box Availability For a Venture 20513 Pin Box
    At this time the only Sidewinder pin boxes that we have to replace a Venture pin box are the standard Sidewinder, part # RP61450, and the 5th Airborne Air Ride Sidewinder, part # RP61452. These pin boxes are designed to replace the Venture CJ13515 and CJ13517 pin boxes. You can measure your existing pin box to determine if one these pin boxes, or another, will work on your trailer. We have an article that details how to measure and it has a chart the will allow you to compare your measurements...
    view full answer...
  • Recommended Custom Wedge For Sidewinder 5th Airborne Compatibility With Curt A20 5th Wheel Hitch
    The Reese 5th Airborne Premium 5th Wheel Air Ride King Pin w/ Sidewinder and Turret - 16,000 lbs # RP61452 does have a custom wedge to work with the Curt A20 5th Wheel Trailer Hitch w/ R20 Slider - Dual Jaw - 20,000 lbs # C16541. The custom wedge you want is the Sidewinder Wedge for Curt A16 and A20 5th Wheel Trailer Hitches # C16992. When using the Sidewinder with a sliding 5th wheel hitch, you will want the slider locked in the front towing position at all times. You may also choose...
    view full answer...
  • Can a 5th Wheel Trailer Hitch be Installed in a 2015 RAM 3500 Short Bed with Rambox
    I can set the record straight for you. No manufactures fit the Ram trucks that have the Rambox feature. The issue is the bed is more narrow and the trailer pin box will hit the sides of the bed when you turn. Some customers have used a Sidewinder pin box in place of the regular pin box on the trailer. This moves the pivot point of the trailer back 22 inches. We have been told by customers this works. However, none of the manufacturers have tested this to confirm. Customers would start...
    view full answer...
  • Will a B and W Companion Hitch Work with a Sidewinder Pin Box Replacement
    If the B and W Companion hitch is one like the # BWRVK3600 that attaches using the 4 pucks it will work with a Sidewinder. If the Companion hitch is like the # BWRVK3500 which only attaches with the center post for the gooseneck hitch it can't be used with a Sidewinder due to the torque the Sidewinder would put on the attachment point. You will want to use the proper wedge, part # SWW-06, with the Sidewinder. I attached a help article on Sidewinders for you to check out as well.
    view full answer...
  • Fifth Airborne and Sidewinder for a Forest River Sierra with a Venture CJ13515 Pin Box
    The 5th Airborne and Sidewinder together for a Venture CJ13515 pin box is # RP61452. This unit has a maximum capacity of 16,000 pounds so make sure your trailer, when loaded and ready to tow, does not exceed the 16K limit. I have included a link to the installation details for you to view. I have also included links to an FAQ on 5th Airborne units and to Sidewinders for you. The Sidewinder moves the pivot point of the trailer back 22 inches. If you have a slider trailer hitch, it must...
    view full answer...
  • Can a Sidewinder Pin Box be Rotated By Hand and 5th Wheel Hitch for 2015 Chevy Silverado 3500
    A Sidewinder pin box would be very difficult to move by hand. It is designed that way on purpose because if it was easy to move that could increase the likelihood of trailer sway. As far as the angle you would have the same limitations using a Sidewinder as you would with any pin box. To compensate for awkward angles a hitch that has a full floating head (can move freely in any direction, not just side to side and front to back) would be the best hitch to use. If you choose to go...
    view full answer...
  • Sidewinder King Pin to Replace Venture Welding 5th Wheel Pin Box
    I'm not able to determine which Sidewinder will fit your fifth wheel trailer based on that serial but we may be able to figure out. It'll require some measuring. I've linked a help article that explains the steps and measurements needed. Then we can use those and the other linked article to find the correct Sidewinder. Using that article we do know that if your Venture king pin is model CJ13515 or CJ13517 the correct Sidewinder # RP61450. Or if you want the 5th Airborne Premium...
    view full answer...
  • Is There a Reese Elite Airborne Sidewinder To Replace A 10K Revolution Pin Box?
    To know what will fit your trailer, you will first need to determine the bolt pattern on your trailer pin box. Some Revolution models cannot be replaced according to my contact at Reese and others can. To determine your fit, I've attached an article to help get the correct bolt pattern for your pin box so we can determine if there is a replacement for your application or not.
    view full answer...
  • Recommended 5th Wheel Hitch, Slider for 2015 Dodge Ram Pickup with Rambox
    Officially our 5th wheel hitch suppliers do not recommend any 5th wheel hitch installation in Dodge Ram pickups that have the Rambox system due to the reduced bed width. We have, however, heard reports of successful installations in the 2014 Rambox-equipped trucks using a Sidewinder replacement pin box. The Sidewinder moves the pivot point back 22-inches behind the king pin which keeps the body of the pin box stationary within the limited available width of the Rambox bed. This configuration...
    view full answer...
  • Replacement King Pin for MORryde RPB72-2210031
    There is an upgraded king pin which will greatly improve your ride available as a replacement for your MORryde, though not a Trailair. From my research, your MORryde RPB72-2210031 was a replacement for Dexter pin box 221-0031-00 and the upgrade replacement which fits is the 5th Airborne Premium # RP61452 from Reese. This is similar to the Trailair in that it greatly reduces the amount of chucking and jarring you'll experience when towing, and uses an air bag to help deliver a smoother...
    view full answer...
  • What TrailAir Pin Box Replaces M-Tec RVPN1409 and Venture CJ13515 5th Wheel Pin Boxes
    My contact at 5th Airborne confirms the M-Tec pin box on your 5th wheel, number RVPN1409, corresponds to Venture pin box reference CJ13515 and can be replaced with their # 5AB-S13515 or any of the other pin boxes shown on the attached link. The 5th Airborne Sidewinder pin box that corresponds to your original is part # RP61452. This pin box is rated for 16K trailers and is a direct bolt-on installation. You can re-use your existing hardware. Note that Sidewinder type pin boxes cannot...
    view full answer...
  • 5th Wheel Hitch Recommendation for 2017 Ram 3500 Short-Box with Factory 5th Wheel Rail Kit
    The best slider hitch for your 2017 Ram 3500 short-box that has the factory 5th wheel rail kit is without a doubt the B&W Companion # BWRVK3670. This 20K-rated hitch drops directly into your factory pucks and its slider gives you a full foot of travel for low-speed maneuvers. B&W fabricates and assembles their hitches not too far from us, in Humboldt, KS, and their products are renowned for their excellent design and better-than-it-needs-to-be build quality. (B&W actually builds...
    view full answer...
  • Is a Sidewinder Pin Box Compatible With a B&W Turnoverball Gooseneck Hitch?
    To use any Sidewinder pin box like # RP61452, you will not be able to keep your B&W Turnoverball Gooseneck hitch because it is not made for the torque when turning required for that system. No adapter will solve this. However, there is still a way to allow you to tow a gooseneck trailer using a 5th wheel rail kit. You have a couple options. If you want to keep a clean bed, then you can use the Under-Bed Rail and Installation Kit for Reese Elite Series 5th Wheel Trailer Hitches # RP30074...
    view full answer...
  • Troubleshooting Turret Bolts of Sidewinder Coming Loose
    When you tightened the 4 turret bolts did you use the included lock washers? Lock washers should prevent the bolts from backing out and if you didn't use them they would back out much easier. You can try thread locker like Loc Tite # LT37420.
    view full answer...
  • What is the Torque Rating for the Turret Bolts on My 2007 5th Airborne Sidewinder?
    I was able to track down a copy of the instructions for your 2007 5th Airborne Sidewinder with the 3 turret bolts.The 3 bolts need to be torqued at 80 ft./lb. per the instructions. Keep in mind that you are not torquing the bolts as one would when clamping something together,but torquing to retain the 2 pieces. My contact at Reese explained that the lock washers and bolts may need to be replaced over time and they recommend checking the torque after each use. He said that Reese also recommends...
    view full answer...
  • How to Determine if a Sidewinder from One 5th Wheel Trailer Will Fit on a Different Trailer
    To determine if there is a Sidewinder and/or 5th Airborne Sidewinder for the new trailer I will need to know the manufacturer and model number of the pin box itself. This information should be on a sticker or plate on the pin box. On most 5th wheel trailers, there are wings that stick out of the overhang that are part of the frame/chassis structure. the pin box bolts to it so on your existing trailer you would want to get the pin box, including the turret that is bolted to those wings...
    view full answer...
  • How to Identify Correct Replacement Sidewinder 5th Wheel Pin Box
    You can select the appropriate replacement Sidewinder pivoting pin box for your 5th wheel trailer by using the original pin box part number. You can usually find this on the left side sticker on the box itself. If this information is not available the linked article shows how to measure to determine the original pin box type and you can then match up the Sidewinder by referring to the other article. The Reese Airborne Premium 5th Wheel Air Ride King Pin with Sidewinder that you mentioned,...
    view full answer...
  • Is Curt Q20 5th Wheel Hitch Compatible with Reese 5th Airborne Premium 5th Wheel Air Ride King Pin
    I do have a solution for you but unfortunately the Curt Q20 hitch head is not compatible with a pin box that has a rotating turret like the Reese 5th Airborne Premium 5th Wheel Air Ride King Pin. This is due to the spherical axial bearing that allows the hitch head to easily pivot. Instead I recommend using the Curt A20 5th Wheel Trailer Hitch # C16140 and selling your Q20 to help offset the cost. The A20 is very similar to the Q20 but it has a fully articulating torsion head instead...
    view full answer...
  • Elite Series Fifth Wheel Hitch Installation Kit for a 2006 Dodge Ram Pickup
    Yes the # RP30074 custom install kit (see instructions link below) will work with your mega cab. The estimated install time is 120 minutes, but that is for the pros. It would take me longer so I would allow more time unless you have installed these before. When you order the Elite Series fifth-wheel hitch # RP30871, you will need to order for the 8 foot bed to get this option for use with the Fifth Airborne. You will have to drill through the bed of the truck to install the Pucks...
    view full answer...
  • Best Fifth Wheel Towing Setup for 2012 Toyota Tundra 5-1/2 Foot Bed
    Yes, everything you selected will work great as a fifth wheel towing setup for your 2012 Toyota Tundra. The rail kit part # RP50084-58 is a confirmed fit for your 2012 Tundra. The hitch part # RP30047 will fit the rails and will work with the Sidewinder 5th Airborne part # RP61452 that you are ordering as well. This is needed to allow your short bed truck to make tight turns. The P3 # 90195 is the best brake controller around and the correct install harness is the part # 3040-P so you...
    view full answer...

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Info for this part was:

Written by:
Lindsey S
Expert Research:
Michael H
Expert Research:
Jameson C
Expert Research:
Adam R
Updated by:
Laura H
Updated by:
Sarah W
Updated by:
Isabelle B
Installed by:
Randy B
Video by:
Zach D

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