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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Our Price: $1,541.74
Fifth Wheel King Pin
This item qualifies for Free Truck Freight Shipping
Shipping Weight: 205 lbs
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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...
  • 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...
  • 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...
  • 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...
  • 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...
  • Recommended 5th Wheel Towing Setup for a 2017 Ram 1500 with a 5-1/2 foot Bed
    Since your 2017 Dodge Ram 1500 has a box that is shorter than 6 feet you will actually need to go with a stationary 5th wheel hitch and then change the pin box on your trailer to a Sidewinder pin box. There are no sliding 5th wheel hitches that will allow you to make a 90 degree turn with a truck that has a box under 6 feet. The Sidewinder takes the pivot point on your towing setup and moves it from the king pin back 22 inches to the rotating pin box. We have a selection of Sidewinders...
    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...
  • 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...
  • Recommended Reese Sidewinder Compatible With Husky 16K 5th Wheel Hitch and 1621 Pin Box
    The Sidewinder pin box is compatible with your Husky 16K slider as long as you keep it locked in the forward position as you stated. You will want the Sidewinder 5th Wheel King Pin with Rotating Turret - 16,000 lbs # RP34FR for a standard Sidewinder to give you the 22 inches of additional turning clearance. Your other option is to upgrade that to the air ride version in the 5th Airborne Premium 5th Wheel Air Ride King Pin w/ Sidewinder and Turret - 16,000 lbs # RP61422 to reduce chucking...
    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...
  • 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...
  • 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...
  • Compatibility of a Sidewinder Hitch for a Lippert King Pin
    I contacted Lippert and found out that you have a Lippert 1621 king pin on your trailer. Sidewinder has two options for this model Lippert king pin. Part # RP34FR with a 16,000 lbs Gross Trailer Weight (GTW). Reese also offers an air ride king pin with a Sidewinder # RP61422. This hitch offers the same Sidewinder hitch system, but has an added air spring in the pin box that will absorb shock for a smoother ride. The Sidewinder includes the universal wedge that prevents the king pin...
    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...
  • 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...
  • 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...
  • Sidewinder Recommendation for Keystone Montana 3670rl
    So your Keystone Montana 3670rl will either have a Lippert 1116 pin box or the 1621. Count the amount of bolts that are on each side of the pin box. If it's 6 then you have the 1621 and you need the part # RP34FR. If instead it's 9 you need the part # RP61410 and you have the 1116.
    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...
  • What Are Horizontal Measurements For Reese Revolution Model 61516
    We do not carry the Reese Revolution (OEM product) but do carry the aftermarket version that is similar which is the Reese Sidewinder, Item # RP34FR. I contacted the manufacturer and the horizontal distance from hole center to hole center for your Reese Revolution are 9-1/2 inches and 11-1/2 inches respectively. Contact us if you have other questions.
    view full answer...
  • Calculating 5th Wheel Turning Clearance
    The formula to determine 5th wheel turning clearance is pretty straightforward and is expressed as: (A + B) - C = Clearance A = Distance from center of fifth wheel hitch jaw to truck cab B = Length of Sidewinder arm (22-inches) as with part # RP34FR C = Width of trailer divided by 2 (to get half) For an example, 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" =...
    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...
  • Sidewinder Pin Box for 5th Wheel Trailer with Lippert 1621HD Pin Box and 2013 Ram 2500 Mega Cab
    Yes, you can use a Sidewinder with your Reese slider hitch on your 2013 Ram 2500 Mega Cab. But you will need to leave the hitch locked in the tow position at all times and not slide it back while the trailer is attached. Doing so puts too much stress on the system. Also, you mentioned having an Elite Series 16k hitch but the Elite Series did not come in a 16K. There is an 18K model, # RP30144. If the trailer also weighs 18K then I strongly recommend switch to the higher capacity Elite...
    view full answer...
  • Compatibility of Reese Elite Fifth Wheel Hitch with 2015 Ford F250 w/ OEM Tow Prep Package
    The hitch you mentioned is the same as the Reese Elite, part # RP30142. If you haven't purchased the hitch yet, you might consider getting it from us, as I'm confident our price will be better. The hitch is indeed compatible with the Reese Revolution/Sidewinder pin box. The Sidewinder/Revolution will provide almost twice the extra clearance (22 inches) as a sliding hitch (10-12 inches) would. It'll also eliminate the need to exit the truck to actuate the slider. If you don't already...
    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 a Sliding Fifth Wheel Hitch be Used with a Sidewinder Pin Box
    You can definitely still use a Sidewinder with a sliding fifth wheel hitch. Like you mentioned, you would just leave it slid forward all the time and you would be just fine. The correct Sidewinder to use to replace your Lippert 1621 style pin box is the # RP34FR. I attached an install video for this Sidewinder plus a help article on them for you to check out as well.
    view full answer...
  • Recommended 5th Hitch and Pin Box for Towing Jayco Eagle with 2008 Silverado 2500HD Short Bed
    I will assume that your 2008 Silverado 2500HD has the 6-1/2 foot bed. The pin box of a fifth wheel trailer is the extension that comes off of the underside of the trailer loft. The king pin that locks into the jaws of the fifth wheel hitch extends from the bottom of the pin box. I have edited a photo for you showing these parts. For a 6-1/2 foot bed, we typically recommend using a sliding fifth wheel hitch to provide the proper clearance between the front of the trailer loft and the...
    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...
  • Measuring a 5th Wheel Trailer Pin Box for a Replacement Sidewinder Pin Box
    I have included a picture that shows the important measurements on Sidewinder # RP34FR. It fits in place of several OEM pin boxes so I have the measurements for each one it fits in the picture. I have also linked our Sidewinder help article and measuring for a replacement pin box article that shows these measurements at others.
    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: $1,491.05
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Info for this part was:

Expert Research:
Mike L
Expert Research:
Jameson C
Edited by:
Lindsey S
Updated by:
Sarah W
Written by:
Alexander C
Installed by:
Michael B

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