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  1. Fifth Wheel King Pin
  2. Reese
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Reese Sidewinder 5th Wheel King Pin with Rotating Turret - 20,000 lbs

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

Our Price: $1,819.73
You Save: $271.29
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. 1-636-306-4830 to order Reese fifth wheel king pin part number RP34FR or order online at Free expert support on all Reese products. Great prices and Fastest Shipping for Reese Sidewinder 5th Wheel King Pin with Rotating Turret - 20,000 lbs. Fifth Wheel King Pin reviews from real customers.
  • All Info
  • Reviews (22)
  • Q & A (0)
  • Photos
  • Why etrailer?

Reese Fifth Wheel King Pin

  • Fabex 663
  • Fabex 665
  • Lippert 0719
  • Lippert 1621
  • Lippert 1621HD
  • M and M 663
  • M and M 665
  • 20000 lbs GTW
  • Provides Turning Clearance
  • Reese
  • Upgraded Pin Box
  • Rotating Turret

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 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
  • Curt A-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

69220 Reese Side Winder Fifth-Wheel Pin Box Coupler with Turret and Hardware - 20K

Replaces Reese 68220

Item # RP34FR

Installation Details RP34FR Installation instructions

Customer Satisfaction Score:

Customer Reviews

Reese Sidewinder 5th Wheel King Pin with Rotating Turret - 20,000 lbs - RP34FR

Average Customer Rating:  4.9 out of 5 stars   (22 Customer Reviews)

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.


I drive a RAM 2500 shortbox diesel with the Rambox feature that I really like. It also had the factory puck system in the bed. But when I found the 5th wheel I wanted i soon realized that the stock Lippert pin box would not work with my truck. I wanted to use the Curt A20 hitch that I already had but assumed that I would need to replace that for a sliding hitch. When I discussed my issues with the etrailer support tech he told me about this Reese sidewinder and all the reasons it would work with my truck where nothing else would. He was spot on with his advice. I've now had the Reese for a year and have been out many times without issue. I can even make 90° turns and the trailer cap doesn't even come close to the truck cab. I can even open the Rambox most of the way with the trailer mounted. I'm very happy with the product. This hitching stuff can be complicated and risky and I'm glad I talked to the support team before I may have made a stupid mistake.


Needed a pin that would fit my short bed and Ram Boxes. After extensive research I coupled this along with the B&W patriot 18K hitch and I have full clearance on my trailer and cab. I now have an extra 22 inches that other hitches wouldn't and couldn't give me.


Having a Ram 3500 Megacab, short bed, I was terribly worried about hitting the cab with my Momentum toy hauler given it's 102" wide. My choice was slider or this Reese Sidewinder. I chose the Sidewinder and darn glad I did. It works as advertised and I can turn a full 90 degrees with about 5" of clearance between the cab and my front nose of the trailer. Some words of caution: this pin box is heavy! Get it professionally installed by your RV dealer. The wedges for your particular hitch will take some getting used too. Move wedge back to hitch, move forward to lock into place. Even still, I need to lay in the bed and have rigged up a heavy wire to assisting getting that wedge tight in the funnel. If you don't, the hitch will move on corners and you feel a big shift of weight.

Bottom line, I like it, it was the right decision for me and didn't take up any more payload than necessary unlike a heavy slider hitch. Recommended! And etrailer delivered on time as promised.


My only regret with this kingpin is not switching to it sooner. I recently changed up my entire set up to this kingpin and a Hensley BD5 Trailer Saver hitch, for my 41ft Jayco Seismic Wave. If you use a slider hitch, whether auto or manual, you know there's a significant lag in response from the trailer when turning and backing. This kingpin eliminates that lag time. My hitch/kingpin combo is a pricey upgrade, but if you tow often then it will be money we'll spent.


The sidewinder works exactly as advertised, We installed this on our 41' Heartland Landmark 365 and the increase in manuverability is awesome.
The quality is top notch and I would recommend this product all day long.
I installed this myself and it bolted right into place with zero issues.
If your on the fence about purchasing this product I highly recommend pulling the trigger, you won't regret it...


Got expert advice from David B. This arrived along with my Reese fifth wheel hitch and they work beautifully together to solve my problems with towing a fifth wheel with a ram that had a ram box. Giant pain in the butt but problem has been resolved thanks to y’all


Works as advertised. Heavy duty hitch. Much safer than what came with the RV.


It is the best thing that a novice 5th wheel owner could ask for. Having to go get a class A license to pull my trailer, it made it easy for me to pass the test with litte 5th wheel experience but a lot of bumper tow experience. The mechanical aspect of this unit is what sold me. Few moving parts and no sliding components made me feel safe and confident while navigating my trailer in some difficult situations. And pulling a 19,000 pound trailer accross California's raods, you need all the confidence in your equipment you can get.


For those who are considering a “slide hitch” this is a better alternative. Rather than get into a bind and need to release the slide feature, the Sidewinder pin box pivots farther back than a typical pin box so it never puts your pickup in a compromising position. I purchased a 20k standard hitch to use in conjunction with the Sidewinder. I have no regrets and I highly recommend this pin box.


Excellent customer service. Teresa was very helpful, listened to my setup questions and knew right where to go. I enjoyed the buying experience and felt confident that my money was going to the right product and company. Thanks Teresa and etrailer.


The sidewinder is an Awesome Product thanks etrailer!!


UPS ran a day late. The hitch is awesom e.


It works great on my 5th wheel 40 ft toy hauler momentum






Review from a similar Sidewinder in Fifth Wheel King Pin

it works great we used boards before purchasing the camco sidewinder RV sewer hose support system with storage handle.


Review from a similar Sidewinder in Fifth Wheel King Pin

I'm an absolute green horn, jumping in big time with a 45' Momentum and desired RAM 3500 HO Mega cab. After extensive research, I was glad to find validation here for an "ultimate short bed solution" with the Sidewinder cushioned on a BD5 Trailer.
My only other consideration at this point would be the Reese goose ball.
It may not offer quite as much turning angle or cushioning, but has the bed space advantage. Thank you!


Review from a similar Sidewinder in Fifth Wheel King Pin

I purchased this just over one year ago and it has performed its mission flawlessly. I have moved my tandem multiple times and thousands of miles on a 2005 Chevrolet Uplander LT without incident. The bike is held securely at the front fork and the bottom (horizontal) tube between the bottom brackets. I was concerned initially, but this does hold the bike very securely. In my opinion, the biggest benefit of this design is the incredible ease of loading the bike. The front pivoting feature makes loading a tandem easier than loading any other bicycle on any other rack I have ever used. I can do it alone and my feet only need to leave the ground to attach the bottom tube restraints, much less than what I need to do when loading single bikes.

Still very happy with the rack! This has proven to be a very worthwhile purchase.
William R - 01/18/2021


Review from a similar Sidewinder in Fifth Wheel King Pin

I am using this pinbox with a 6.6' bed on my Ram with Ramboxes. My old pinbox would hit the sides and limit my turning ability. This was an awesome solution, very happy.


Review from a similar Sidewinder in Fifth Wheel King Pin

Sidewinder worked great for my short bed Ram. Be sure to get the matching wedge for your hitch.

Thanks etrailer. I will be using you for all my trailer components


Review from a similar Sidewinder in Fifth Wheel King Pin

The A team!
E trailer and camco sewer
hose support system is excellent
Nice compact storage good quality.
Great customer service and quick shipping.


Review from a similar Sidewinder in Fifth Wheel King Pin

Have not used this idem yet but arrived earlier than promised and is going to work just fine.


Review from a similar Sidewinder in Fifth Wheel King Pin

Excellent product! Took seconds to set up and worked prefect! Unfolds easy , nice carring handle. I would highly recommend this. Price and shipping is great.

Show More Reviews

See what our Experts say about this Reese Fifth Wheel King Pin

  • Can a Sidewinder Be Used with Valley Power Pull Fifth Wheel Hitch
    Yes, a Sidewinder pin box like the # RP34FR will work great with a Valley Power Pull fifth wheel hitch.
    view full answer...
  • Does Pivoting/Rotating Trailer Pin Box Make it Easier or More Difficult to Back Up Trailer
    With the pivoting/rotating pin boxes like the Sidewinder part # RP34FR installed on fifth wheel trailers you'll find that it's a bit easier to back up than the style that pivots above the truck's rear axle. Since the pivot point is moved back further the trailer will react to turning more like a bumper pull trailer being towed. You'll also notice that the trailer tracks better behind the tow vehicle around corners as well. It won't want to take as much of a shortcut.
    view full answer...
  • How Could a Truck Tow a Trailer with a Pin Weight Higher than the Payload of the Truck
    Sounds like you are asking about the pin weight of a trailer exceeding the capacity of the payload figure that the truck bed has. You should note that the payload figure is basically the weight capacity of the truck bed and cabin which is made from sheet metal and supported by the truck frame. The pin weight of a fifth wheel trailer is fully supported by the frame of the truck which is why it can be higher than the payload capacity.
    view full answer...
  • How to Determine Correct Sidewinder for 5th Wheel Trailer
    I can tell you exactly how to find out what the correct Sidewinder is for your Heartland E22, though that information is not something we have available to us. There are a couple routes you can take in order to find out what Sidewinder you need, and you will need to know the manufacturer and model number of the pin box on your fifth wheel and match that with the correct replacement. For example, Sidewinder # RP34FR will replace Lippert 0719, 1621 and 1621HD, as well as Fabex PB 600 Series...
    view full answer...
  • Will Sidewinder be Able to be Turned by Hand
    A Sidewinder such as the Sidewinder 5th Wheel King Pin with Rotating Turret # RP34FR is going to be quite difficult to turn by hand. So long as it is rotating properly when your trailer is connected there is not an issue; the weight and force of a trailer is going to be far beyond the force you can apply by hand so if the Sidewinder is working as intended when towing there are no issues.
    view full answer...
  • Sidewinder Pin Box for Use With Reese 5th Wheel Hitch in 2012 Toyota Tundra Crew Max 5-1/2ft Bed
    Usually with short bed trucks you have the option of a slider or Sidewinder, but considering you have a 5-1/2 foot bed I think your best bet to safely tow your Triumph 5th Wheel is going to be with a Sidewinder pin box like the Reese # RP34FR. A Sidewinder style pin box like the Reese is going to provide you with 22" of travel compared to a sliding hitch, that typically can give you anywhere from 8-14". This extra clearance is going to compensate for the shorter bed on your 2012 Toyota...
    view full answer...
  • Can 2013 Ram 2500 with Ram Box Tow 5th Wheel Trailer with Hensley BD3 Hitch
    The only way tow a fifth wheel hitch with a Ram like your 2013 2500 that has the Ram Boxes is by installing a Sidewinder pin box like the # RP34FR on the trailer as this moves the pivot point high enough to give the needed clearance for the narrower bed rails due to the Ram Boxes. 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 the trailer that...
    view full answer...
  • Can a Slider 5th Wheel Hitch Be Used On a Ram 2500 with RamBoxes
    I do have an option for you but you cannot use a sliding 5th wheel hitch on a truck with RamBoxes. The only option you have to tow a 5th wheel trailer is to use a fixed 5th wheel hitch with a rotating pin box as that is the only way you will have enough clearance to turn with the RamBoxes. The rotating pin boxes are model specific so I will need to know what model you have now (sticker on side) in order to offer a replacement for this. The Sidewinder 5th Wheel King Pin with Rotating Turret...
    view full answer...
  • Torque Spec for Turret Bolts On a Reese Sidewinder Pin Box
    In regards to the Sidewinder 5th Wheel King Pin with Rotating Turret part # RP34FR, the four bolts that hold the turret to the arm will need to be torqued using a cross pattern to 150 ft lbs and then backed off and re-tightened to 45 ft lbs. I have attached a copy of the installation instructions to this answer for you as well.
    view full answer...
  • Sidewinder Replacement for MORryde RPB72-1621HD Pin Box
    Thanks for the part number of your MORryde RPB72-1621HD; based on that you had a Lippert 1621HD pin box which can be replaced by the Sidewinder 5th Wheel King Pin # RP34FR, which has a 16,000 lb capacity. You are correct about the 22 inches you referred to in the formula, though it should be noted that there needs to be at least 4 inches left over in order for you to safely execute a 90 degree turn. Additionally, please keep in mind that you will not be able to use the sliding feature...
    view full answer...
    Image 1 for
  • Proper Lubrication of Sidewinder Pivoting Pin Box
    Yes, Sidewinder pivoting pin boxes should be lubricated periodically. The linked article shows where to apply grease on the skid plate, king pin and wedge for easier hookup and the linked diagram (figure 11 from the included written instructions) shows how to lube the rotating turret for quietest operation.
    view full answer...
    Image 1 for
  • Will Mor/Ryde Pin Box # RPB72-1621SHD Work with Sidewinder 20k
    The Mor/Ryde pin box RPB72-1621SHD has the same bolt pattern as the Lippert 1621HD so the Reese Sidewinder 19k part # RP34FR is what you need to replace the pin box. The Sidewinder is the best option we carry to add clearance between the fifth wheel hitch and the Jeep on your semi trailer. The Sidewinder is designed with a rotating turret that moves the pivot point of your setup an extra 22 inches toward the rear of the vehicle. The extra 22 inches allows for more clearance but I can not...
    view full answer...
  • Movement and Torque Specs for Reese Revolution or Sidewinder Pin Box
    You need to operate within the torques specs. On a Reese Revolution or Aftermarket Reese Sidewinder the Grade 8 bolts going through outer cap should be torqued to 45 ft-lbs. It should not be easy to move when not under weight, in fact you shouldn't be able to move the pin box by hand.
    view full answer...
    Image 1 for
  • Can Hitch Head of Pullrite Hitch Move Back for Additional Turning Clearance
    Yes, you can move the hitch head of your Pullrite hitch back an inch or two to give you additional turning clearance. While the head moves back slightly the hitch still sits above the same spot above the rear axle of the truck so this will not negatively affect anything.
    view full answer...
  • Can Sidewinder Pin Box Fit on 2018 Jayco Eagle HT 27.5RLTS
    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 on your 2018 Jayco Eagle HT 27.5RLTS. There should be a sticker or a stamping on the OEM pin box of the trailer that will list the pin box number that is on the trailer. Once you figure out which pin box you have you can check the FAQ I attached that has a chart that shows the correct Sidewinder to get based on which pin box you have. If you cannot find the number...
    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" = 7" of clearance....
    view full answer...
  • Which Sidewinder Fits 2004 Forest River Cardinal
    Your 2004 Forest River Cardinal fifth wheel trailer has a Lippert 1621 style of pin box on it so the correct Sidewinder would be the # RP34FR.
    view full answer...
  • Troubleshooting Sidewinder/Reese Revolution that Tows at an Angle
    If your Sidewinder/Reese Revolution isn't tracking straight behind your trailer it is because of a wedge issue on the Sidewinder. You could be using the wrong wedge for your hitch or it needs to be orientated properly. Check out the installation instructions I attached, around page 7 there are instructions on wedge activation. Ideally you use a custom wedge designed specifically for the jaws of your hitch to give you the best fit.
    view full answer...
  • Sidewinder Pin Box Recommendation for 2011 Cougar lite 29RES
    Your 2011 Cougar lite 29RES has a Lippert 1621 pin box. Based on the number starting with 019 we know it's the very common Lippert 1621 pin box. So the correct Sidewinder is the part # RP34FR.
    view full answer...
  • Difficulty of Hitching Trailer to Fifth Wheel Hitch with Sidewinder
    If you fastforward to the 2:30 mark of the video I attached below you'll see our installer connecting a trailer with a Sidewinder to a fifth wheel hitch. You'll see that's it's basically the same as connecting to a regular fifth wheel hitch like what you are probably used to.
    view full answer...
  • How to Pick Out Sidewinder Pin Box for Older Fifth Wheel Trailer
    Sidewinders/Reese Revolutions are pin box specific so you will first need to know what pin box you have know in order to pick out the correct one. There should be a sticker or a stamping on the OEM pin box of the trailer that will list the pin box number that is on the trailer. Common Lippert pin boxes are 1621, 1621HD, and 1716. Once you figure out which pin box you have you can check the FAQ I attached that has a chart that shows the correct Sidewinder to get based on which pin box...
    view full answer...
  • Determining Correct Sidewinder Pin Box to Replace OEM Model
    Sidewinder replacement pin boxes are made to fit in place of specific OEM units. The correct replacement pin box will be a direct bolt-on fit. If you contact the trailer maker with its VIN they will be able to tell you the OEM pin box number they installed at the factory. With that you can use the linked article to verify that the recommended 16K unit # RP34FR is the correct fit. This particular Sidewinder is meant to replace only the following OEM models: Fabex 663 and 665 Lippert 0719,...
    view full answer...
  • How to Determine Pin Box Model to Find Correct Replacement
    Check out the link I attached below that details how to measure a pin box to determine what model is. Use the chart at the bottom of the page to see check your measurements against and then see which you have. There are links there too so that you can click the pin box you have and see which replacement pin boxes will fit. For example if you have the popular Lippert 1621 the Sidewinder part # RP34FR is the correct fit.
    view full answer...
  • Are Sidewinders With 19k or 21k Capacities Available?
    There is a Sidewinder with a 20,000 lb capacity but not a 19K or 21K capacity. You will need to know the model number of your current pin box in order to find the correct fit. Sidewinder # RP34FR replaces Lippert 0719, 1621 and 1621HD, Fabex 663 and 665, as well as M&M 663 and 665 pin boxes. I have added a link to a help article on Sidewinders for you to take a look at as well.
    view full answer...

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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
Employee Joshua S
Video by:
Joshua S
Employee Wilson B
Updated by:
Wilson B
Employee Carrie F
Updated by:
Carrie F
Employee Alexander C
Written by:
Alexander C
Employee Michael B
Installed by:
Michael B
Employee Ryan G
Test Fit:
Ryan G

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