1. Fifth Wheel King Pin
  2. Reese
  3. Provides Turning Clearance
  4. 20000 lbs GTW
  5. Pin Box Upgrade
Reese Sidewinder 5th Wheel King Pin with Rotating Turret - 20,000 lbs

Reese Sidewinder 5th Wheel King Pin with Rotating Turret - 20,000 lbs

Item # RP34FR
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Fifth Wheel King Pin
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Shipping Weight: 205 lbs
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RP34FR - 20000 lbs GTW Reese Fifth Wheel King Pin
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Make tight 90-degree turns with your short-bed pickup while towing your fifth-wheel trailer using this extended pin box. The pivoting action lets your trailer turn and clear the cab so you don't have to exit your truck to adjust when turning. Call 800-298-8924 to order Reese fifth wheel king pin part number RP34FR or order online at etrailer.com. Free expert support on all Reese products. Guaranteed Lowest Price and Fastest Shipping for Reese Sidewinder 5th Wheel King Pin with Rotating Turret - 20,000 lbs. Fifth Wheel King Pin reviews from real customers.
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Reese Fifth Wheel King Pin - RP34FR

  • Provides Turning Clearance
  • Reese
  • 20000 lbs GTW
  • Pin Box Upgrade

Make tight 90-degree turns with your short-bed pickup while towing your fifth-wheel trailer using this extended pin box. The pivoting action lets your trailer turn and clear the cab so you don't have to exit your truck to adjust when turning.


  • 5th-Wheel pin box lets you make tight turns while towing your trailer, even in your short-bed pickup
    • No need to get out of your truck to adjust a 5th-wheel slider
  • Rotating turret acts as new pivot point, letting you clear your truck's cab while turning
    • Pivot point is moved 22" towards the rear, offering plenty of clearance while still keeping your load safely in front of the rear axle
  • Easy hookup and disconnect - king pin slides into your 5th-wheel trailer hitch from almost any angle
  • Locking wedge prevents king pin from rotating inside your Reese or Pro Series 5th-wheel hitch
    • Some other 5th-wheel hitches may require custom wedge (sold separately)
  • Simple to maintain - just lubricate king pin, screw, and pivoting shaft
  • Bolt-on installation - replaces your existing 5th-wheel pin box
    • A 1-1/8" socket and wrench are needed for proper installation


  • Designed to replace the following pin boxes:
    • Fabex 663 and 665
    • Lippert 0719, 1621 and 1621HD
    • M&M 663 and 665
    • Lippert 1716, 1116, and 0115 (spacer kit required - sold separately)
  • Weight capacity: 20,000 lbs
  • Maximum pin weight: 5,000 lbs
  • Clearance: see formula below to ensure proper clearance
  • Limited lifetime 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 Sidewinder installed.

(A + B) - C = Clearance

A = Distance from center of fifth-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 20,000-lb 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 Sidewinder Design

Sidewinder Diagram
  1. The pivot point sits 22" behind the king pin.
  2. The rotating turret attaches to the pin box on your trailer to provide the new pivot point.
  3. The reversible, adjustable king pin locking wedge (not pictured) prevents pivot at the fifth-wheel hitch.
  4. The king pin connects to the fifth-wheel trailer hitch in your truck bed.
  5. The arm is rated at 20,000 lbs.

Get Up to 90-Degree Turning

90 Degree Turns with 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" away from the cab.

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 Sidewinder with any of the following:

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

68220 Reese Side Winder Fifth-Wheel Pin Box Coupler with Turret and Hardware - 20K

Installation Details RP34FR Installation instructions


Ask the Experts about this Reese Fifth Wheel King Pin

  • 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...
    view full answer...
  • 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.
    view full answer...
  • 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...
    view full answer...
  • Recommended B&W 5th Wheel Hitch for 2018 Ram 2500 with Factory Tow Prep Package
    Reese's 5th wheel hitch # RP30160 for the Ram factory prep package is a solid 20K hitch that gives you the convenience of rail-free drop-in installation in your Ram truck's puck system. If this fits your budget then it is an excellent choice. Reese customer support is very good. If you have room to stretch a bit on price I suggest considering the B&W Companion hitch # BWRVK3600 which also fits your factory prep package. This hitch has a 25K rating which instantly gives you a whole lot...
    view full answer...
  • 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...
    view full answer...
  • Sidewinder Wedge for 20,000 lb Reese M5 5th Wheel Hitch
    The correct wedge for use with a Reese Sidewinder # RP34FR and the Reese M5 5th Wheel Trailer Hitch # RP30921 is the following: - Sidewinder Wedge Kit for 20,000 lb Reese ELITE, M-Series, or Pro Series 5th Wheel Trailer Hitches # RP44FR.
    view full answer...
  • 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 .
    view full answer...
  • 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...
    view full answer...
  • 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...
    view full answer...
  • Reese5th Wheel Hitch & Base Rails for 2019 Ford F-150 With 5-1/2 Foot Bed & Sidewinder
    We do have a 5th wheel hitch and base rails that will work with a Sidewinder for your 2018 Ford F-150 with a 5-1/2 foot bed, though the part number you gave is just the head unit of a Reese Pro Series hitch, so you'll need the full set up. The parts you need are the following: - Reese 5th Wheel Trailer Hitch # RP30047 - Reese Semi-Custom Base Rail and Installation Kit for 5th Wheel Trailer Hitches - Ford F-150 # RP30035-31 - Sidewinder Custom Wedge # SWW-03 - Bargman 5th Wheel/Gooseneck...
    view full answer...
  • Is a Sidewinder replacement Pin Box the Same Length as a Factory Pin Box
    A regular 5th wheel trailer pin box pivots at the king pin. A Sidewinder locks out that pivot point and moves it back 22 inches. The overall length of the Sidewinder and stock pin box may not be different but where the trailer actually pivots is the big difference. I have included a link to our help article on Sidewinders for you to view. An extended pin box will not offer nearly the same amount of clearance as a Sidewinder so you would use a fixed 5th wheel trailer hitch and a Sidewinder.
    view full answer...
  • Sidewinder and Hitch Recommendation for 2015 Ram 3500 for Best Turning Clearance
    The Demco Hijacker Autoslide is a nice hitch but it does weigh quite a bit so for easy removal it would not be my first choice. Also since you have a long bed truck you really aren't going to gain much with a slider hitch in terms of clearance. With a Sidewinder pin box the trailer will track better behind the vehicle around tight turns and be easier to back up so this would be the solution I would go with. You will need to remove the pin box of the trailer and replace it with a Sidewinder...
    view full answer...
  • 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....
    view full answer...
  • 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...
    view full answer...
  • Sidewinder Pin Box Recommendation for 2015 Grand Design 29RS Camper
    What you would want is the Sidewiner part # RP34FR for your 2015 Grand Design 29RS that has a Lippert 1621 pin box installed in it but that's only if the B and W hitch you have is one that attaches a factory Ford rail kit in your truck bed. If you have the aftermarket gooseneck setup we don't have a Sidewinder that will work with it. This will give you the clearance you need to make tight turns and will work great with the B and W Companion hitch # BWRVK3300 you might have installed...
    view full answer...
  • 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...
    view full answer...
  • How to Pick Out a Sidewinder Hitch for a Fifth Wheel Trailer
    In order to pick out a Sidewinder we need to know the pin box model and number. Once you know that check out the link I attached and scroll down to the chart that has all of the pin boxes listed and the correct Sidewinder replacement. If you can't find that information you can also check out the link I attached on how to determine the correct Sidewinder by pin box measurements. The part # RP34FR will fit the following pin boxes: Fabex 663 and 665 Lippert 0719, 1621 and...
    view full answer...
  • More Clearance for Short Bed With Atwood AB72 Pin Box
    I can help you figure out how to get more turning clearance with your short bed truck. Due to the style of the Atwood pin box you have on your trailer the Sidewinder is not recommended to be used. An alternative to this would be a sliding hitch. A sliding hitch will give you turning clearance for your trailer just not the 90 degrees that the Sidewinder provides. I really like the Demco Hijacker AutoSlide's, # DM8550035, technology because you never have to get in or out of your...
    view full answer...
  • Can a Sidewinder With Rotating Turret be Used with a Gooseneck Trailer Hitch Ball.
    A Sidewinder like # RP34FR cannot be adapted to work with a gooseneck trailer hitch ball. What you would need to use is a Goose Box like # RP94716 for Lippert 0719, 1621 and 1621HD or Fabex PB-600 Series pin boxes. Or, we have # RP94716-61301 for Lippert 0115, 1116 and 1716 pin boxes. We have other adapters for towing a 5th wheel trailer with a gooseneck hitch. I have included a link to an FAQ article that covers the options. You can also try a taller ball and lower the pin box or...
    view full answer...
  • 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...
    view full answer...
  • Would a Reese Sidewinder Pin Box Cause Trailer Sway
    We have never had any issues with Sidewinder pin boxes causing sway on a trailer. In fact, most report back that the overall towing experience has been improved as the trailer will track better behind the tow vehicle and will be easier to reverse. You should note that the pivot point moves back but the overall length of your trailer would not be increased. I attached a help article for Sidewinders for you to check out as well.
    view full answer...
  • Can Sidewinder Pin Box Be Used with Long Bed Truck
    Yes, Sidewinders are mainly designed for short bed trucks to give better cab clearance, but when used in a long bed truck they also allow the truck to track better behind the vehicle around corners and make the trailers easier to back up.
    view full answer...
  • Difference Between Reese Revolution and Sidewinder Pin Box
    A Reese Revolution and a Sidewinder Pin Box are essentially the same thing. It is simply called a Revolution when it comes as OEM/factory equipment on a trailer. The aftermarket product is called the Sidewinder. There are some very minor differences between the two, such as available weight capacities (there are more options with the Sidewinder) and the particular turret design on the unit. The Revolution/Sidewinder Pin Box moves the pivot point 22 inches behind the king pin, allowing...
    view full answer...
  • Do Reese Sidewinder Pin Boxes Need to Use a Lube Plate
    A lube plate isn't necessary with a Reese Sidewinder pin box. Instead you will need to apply some grease to the king pin and wedge. If you're looking for a Sidewinder pin box, like # RP34FR, on your trailer let me know the model number of your current pin box and I'll help you find the correct one.
    view full answer...
  • Sidewinder Options to Replace a Lippert 1621 Pin Box
    There are three options for Sidewinders to replace a Lippert 1621 pin box. For a 16k rated Sidewinder we have the part # RP34FR. If you need more capacity than that you would want the 19k version which is part # RP61421. The third version is an air-ride, cushioned Sidewinder that has a 16k capacity. For that you would want the part # RP61422.
    view full answer...
  • Can I Use Andersen Ultimate Hitch With My Reese Sidewinder
    I do have an option for you but the Reese Sidewinder king pin like part # RP34FR is not compatible with the Andersen Ultimate Hitch like part # AM3200 because the Sidewinders are not compatible with adapters or hitches that only have one center point of attachment. The Sidewinder puts too much torque on adapters and requires a fixed hitch with 4 points of contact. If your 2015 Ford F-350 Super Duty has an OEM prep package I recommend Reese M5 5th Wheel Trailer Hitch for Ford Super Duty...
    view full answer...
  • 16k Reese Sidewinder Replacement for 10k Reese Revolution on 2013 Rockwood Signature Ultralite
    We will have a Sidewinder (same as Reese Revolution) that would work as a replacement for your 10k model. But first we have to determine which pin box you have. Most likely your frame is designed to take a Lippert 1621 pin box as that is what customers with similar Rockwood Signature Ultralits have came back and told us but we need to be sure. Up on the pin box there should be a plate or sticker that will say Lippert 1621 or just 1621. If so then you know the part # RP34FR will work...
    view full answer...

Do you have a question about this Fifth Wheel King Pin?

Used Items Available

Condition: Installed

Notes: Item was previously installed/testfitted. Item has signs of installed. Tape and reesidue present on hitch.

Our Price: $1,177.58
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Info for this part was:

Expert Research:
Mike L
Expert Research:
Jameson C
Edited by:
Lindsey S
Video by:
Joshua S
Updated by:
Sarah W
Written by:
Alexander C
Installed by:
Michael B
Test Fit:
Ryan G

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