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Sidewinder with Rotating Turret for Short Bed Pickups

Custom Fit Fifth Wheel Hitch

Sidewinder Fifth Wheel Pin Box Coupler by 5th Airborne

Sidewinder Summary:

Now you can tow a fifth wheel trailer with a short bed pickup WITHOUT a slider hitch. AND it is now possible for pickup trucks with beds shorter than 6 feet (such as Ford Super Crews) to tow a fifth wheel trailer. You can use the clearance formula at the bottom of this page to see if a Sidewinder will work for you.

Note: It is not recommended to use a Sidewinder with a slider hitch.

When towing with a standard king pin, the fifth wheel trailer turns or pivots where the king pin is connected to the hitch. With the sidewinder, the truck and trailer are prevented from pivoting at the hitch. Instead the pivot point is located closer to the tailgate, creating much more space in between the truck cab and trailer on sharp turns. This extra space also becomes available for more cargo such as toolboxes which couldn't fit before. And the new pivot point makes the trailer track better behind the truck for even easier towing.

The Sidewinder is available in 4 different versions - the Standard 16K, the heavy duty 19K, and the Fifth Airborne Sidewinder with Air-Ride in both 16K and 19K versions. The Fifth Airborne Sidewinder allows you to get the benefits of both the Sidewinder and Fifth Airborne Air-Ride king pin. All move the pivot point 22" rearward.

detail of Sidewinder

How the Sidewinder Works

  1. Sidewinder Pivot Point - 22" behind the king pin
  2. Rotating Turret - king pin specific, it attaches to the pin box on the trailer
  3. Universal King Pin Wedge (not pictured) - prevents pivot at fifth wheel hitch
  4. Fifth Wheel King Pin - attaches to the hitch in the truck bed for towing
  5. Sidewinder Arm - is universal and available in 4 styles (16K, 16K with Air-Ride, 19K and 19.5K w/air-ride)

What We Need to Know When Choosing a Sidewinder:

  1. Trailer King Pin type - The Sidewinder couplers are custom designed to replace the standard king pins on trailers, so we'll need to find out the part number of the pin box (king pin) on the trailer.
    • Most king pins will have the pinbox number listed on a sticker or it will be stamped on the king pin itself. If it's not there or worn out, the customer will have to call the trailer manufacturer with their VIN or serial number to have them provide the coupler type.
    • Because the turrets are custom designed, they simply bolt in place of the existing king pin - no drilling required
      • Existing hardware can be used when installing, but new grade 8 bolts are recommended
  2. Fifth Wheel Hitch Type - A universal wedge is included with the Sidewinder that will work on nearly all fifth wheel hitches. The exceptions are Holland and PullRite brand hitches but custom wedges are available for these models (sold separately)
    • Custom wedges are available for most fifth wheel hitch brands, but are not necessary
    • Note:It is not recommended to use a Sidewinder with the Curt Q5 or B&W Companion
      • Curt Q5 - because of the extra movement from the cushioning in the Curt Q5 fifth wheel hitch, the Sidewinder will not function properly
      • B&W Companion - the fifth wheel that mounts in the gooseneck hole - the hitch itself will rotate when using the Sidewinder creating 2 pivot points and therefore a loss of trailer control. To fix you can add (2) 1/2", grade 5 bolts to the rear support to keep the hitch from rotating, but this may void the B&W warranty.

Clearance Formula for Sidewider:

Use the formula below to ensure there will be enough space between your truck cab and trailer when executing a 90-degree turn.

(A + B) - C = Clearance

A = Distance from center of fifth wheel hitch jaw to truck cab

B = Length of Sidewinder arm (16K = 22", 19K = 22", 19.5K = 22")

C = Width of trailer divided by 2 (to get half)

For example: With the 16K arm, if the distance from the center of the hitch to the cab is 36", 36" + 22" = 58". If your fifth wheel trailer is 102" wide, take half (51"), then plug in: 58" - 51" = 7" of clearance.

NOTE: At least 4 inches of clearance is recommended to safely execute a 90 degree turn.

Needed Accessories:

Air compressor (only on Fifth Airborne Sidewinder with Air-Ride) - the air bag in the king pin is adjustable and will need to be filled from time to time

  • Standard schrader valves are used and they are easily accessible on the Fifth Airborne Sidewinder Air-Ride coupler.

Fifth Wheel Trailer Pin Box Matrix Conversions

The Fifth Gear Sidewinder and 5th Airborne Sidewinder are custom designed to replace the existing pinbox on your trailer. Use the tables below to help find the correct 5th Gear pinbox coupler for your application.

Note: Pinbox number will typically be located on a sticker or stamping on the OEM pinbox.

Click to SortTrailer Pin Box
Part Number
Click to SortPin Box TypeClick to Sort

16K Sidewinder

22" Long

Click to Sort

19K Sidewinder

22" Long

Click to Sort

5th Airborne

Air-Ride Sidewinder


Click to Sort

5th Airborne

Air-Ride Sidewinder


Youngs WeldingStandardST500-SW16KST500-SW19KST500-5AS02ST500-5AS16K
Youngs WeldingExtendedST500-SW16KST500-SW19KST500-5AS02ST500-5AS16K
Leland 7921ExtendedST400-SW16KST400-SW19KST400-5AS02ST400-5AS16K
Leland 7920ExtendedST400-SW16KST400-SW19KST400-5AS02ST400-5AS16K
Leland 7910StandardST400-SW16KST400-SW19KST400-5AS02ST400-5AS16K
Venture CJ13517ExtendedST300-SW16KST300-SW19KST300-5AS02RP61452
Venture CJ13515StandardST300-SW16KST300-SW19KST300-5AS02RP61452
M&M 665ExtendedRP61420RP61421RP61423RP61422
M&M 663StandardRP61420RP61421RP61423RP61422
Lippert 1621HDExtendedRP61420RP61421RP61423RP61422
Lippert 1621ExtendedRP61420RP61421RP61423RP61422
Lippert 0719StandardRP61420RP61421RP61423RP61422
Fabex 665ExtendedRP61420RP61421RP61423RP61422
Fabex 663StandardRP61420RP61421RP61423RP61422
RBW 7028ExtendedRP61410RP61411RP61413RP61412
RBW 7019StandardRP61410RP61411RP61413RP61412
Lippert 1716ExtendedRP61410RP61411RP61413RP61412
Lippert 1116StandardRP61410RP61411RP61413RP61412
Lippert 0115StandardRP61410RP61411RP61413RP61412
Fabex 765ExtendedRP61410RP61411RP61413RP61412
Fabex 560StandardRP61410RP61411RP61413RP61412
Fabex 530StandardRP61410RP61411RP61413RP61412
Fabex 520StandardRP61410RP61411RP61413RP61412
Fabex 503ExtendedRP61410RP61411RP61413RP61412
Fabex 500ExtendedRP61410RP61411RP61413RP61412
Youngs Welding Straight 8x8TubeN/AN/AN/AN/A
Youngs WeldingTubeN/AN/AN/AN/A
RBW 7027TubeN/AN/AN/AN/A
RBW 7016-2PTubeN/AN/AN/AN/A
Lippert 0516TubeN/AN/AN/AN/A
Fabex 316TubeN/AN/AN/AN/A
Fabex 314 TubeN/AN/AN/AN/A
Fabex 300TubeN/AN/AN/AN/A
Atwood AB-72TubeN/AN/AN/AN/A
Atwood AB-34 TubeN/AN/AN/AN/A

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