bing tracking image
  1. Fifth Wheel King Pin
  2. Reese
  3. Fabex 663
  4. Fabex 665
  5. Lippert 0719
  6. Lippert 1621
  7. Lippert 1621HD
  8. M and M 663
  9. M and M 665
  10. Lippert Rhino
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
Our Price: $1,672.27
You Save: $49.67
Fifth Wheel King Pin
Shipping Weight: 205 lbs
Add to cart
In Stock
zoom in icon
slider vertical icon
zoom out icon
Comment field cannot be left empty.
Name field cannot be left empty.

Thank you! Your comment has been submitted successfully. You should be able to view your question/comment here within a few days.

Error submitting comment. Please try again momentarily.

Product Images


Need help with installation?
Locate installers near me
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. 1-800-940-8924 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 (27)
  • Q & A (0)
  • Photos

Reese Fifth Wheel King Pin - RP34FR

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

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   (27 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.


Had a 16k sidewinder inbox it cracked traded it out for a20k w/o air bag much beefier unit etrailer helped me out to warranty the pinbox with out a problem Reese drug me along for 3months with no results.
But Paula T. got me taken care
Side note I don’t think it’s right to have to pay freight to return a faulty part that is not my fault. Just wrong. If it was my fault that would be ok. etrailer should change there policy on this !!!!


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.



Its been a year since I upgraded my hitchkingpin set up and my feelings are still exactly the same. The kingpin is great. I love how much faster the trailer responds, especially when backing up, compared to my old slider hitch. Definitely money well spent.


I needed the sidewinder hitch due to transferring from a standard bed truck to a short bed. I installed it my self and the setup was very easy. It works just as it should!


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.


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.


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


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...


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


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.


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


The sidewinder is an Awesome Product thanks etrailer!!


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






Parts where on back order per information given by my 2 other vendors etrailer had it in stock and arrived on time before original ETA
As a owner of a small business etrailer is great to work with and always helpful.


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


I don't always need a hose support system but when I do I use this. Yes it's light plastic so careful. Used about 4 times and nothing has broken.


Nice to be able to stretch it out a long way if you need it to.


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.


When we ordered the Yakima Sidewinder, we hadn't realized that the luggage rack on our new RAV4 was a newer style that did not fit the couplings included with the Sidewinder. We spoke with a rep at Yakima who helped us find a fix (a set of couplings that worked) and discounted the price to us. We have a tandem bike that is quite heavy. This product makes it possible for us get the bike on the top of the car (my wife has a bad back, so I need to do most of the heavy lifting myself) and go anywhere. The product feels good and solid, too. We're secure using it and driving all over the cities and rural areas near Minneapolis.

Show More Reviews

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

  • Torque and Grease Specs for Sidewinder Pin Boxes
    For the swivel arm, the torque should be 150 ft-lbs for the wedge bolts and for the lockout bolts the torque should be 275 ft-lbs (lock out bolts are an optional item). Grade 8 bolts going through outer cap (be sure wear disc is properly lined up) should be torqued to 45 ft-lbs. Pin box torque is as specified in the instructions. A. 1/2 inch Bolts GR5 90 ft-lbs B. 5/8 inch Bolts GR5 150 ft-lbs C. 3/4 inch Bolts GR5 275 ft-lbs I attached a picture that shows the areas of the turret that...
    view full answer...
    Image 1 for
  • Reese Sidewinder RP34FR Measurements To Center Of First Bolt Hole On Turret
    The Reese Sidewinder 5th Wheel King Pin with Rotating Turret - 16,000 lbs # RP34FR has a measurement between the bottom the turret to center of first bolt hole of 5 inches. It has a measurement of 8-1/2 inches from the bottom of the extention arm to the center of the first bolt hole. I've attached a photo to assist.
    view full answer...
    Image 1 for
  • Recommended Routine Lubrication of Reese Revolution & Sidewinder Pivoting 5th Wheel Pin Box
    Yes, a pivoting 5th wheel pin box such as a Reese Revolution (also called a Sidewinder on the aftermarket side) will require routine lubrication. This requirement is perfectly normal. We actually have a help article on this subject that I have linked for you. I also included an image from the article that shows the lubrication points, which include the front skid plate, the rear side of the king pin and both sides of the wedge.
    view full answer...
    Image 1 for
  • Sidewinder King Pin Replacement For Fifth Wheel Trailer With 1621 Pin Box
    We offer a Sidewinder that can be used to replace the Lippert 1621 pin box on your trailer with part # RP34FR.
    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...
  • Recommended 5th Airborne Sidewinder for Arctic Fox 27-5L
    In order to direct you to which model Sidewinder you need, I would need to know the manufacturer and model number of the OEM pin box on the 5th wheel you have ordered. The manufacturer or dealer should be able to provide this information. As we do not sell OEM pin boxes, I cannot speak to their pricing or weight, but by using the link to our Sidewinder FAQ page and scrolling toward the bottom of the page, you can see the various Sidewinder models offered and their current pricing and weights....
    view full answer...
  • Options for Towing Short Bed Truck Aside from Manual Operated Slider Hitch
    Demco and Pullrite pretty much have the market cornered on automatic sliding hitches. Both are really nice and do a great job. The only downside is that they are really heavy since there are so many moving parts that have to be rated for the weight of a trailer. There is a different option that you might consider though that's actually even more convenient. A Sidewinder pin box will give you the clearance you'd need and allows you to use a lighter weight stationary hitch in the bed of...
    view full answer...
  • Sidewinder Recommendation for Truck Bed Making Contact with Pin Box
    Your issue is interesting but adding more height to your setup really won't be the solution since that will cause your trailer to sit nose high and it needs to be level. For a replacement pin box solution that would make this issue go away plus allow you to not have to deal with manually operating your slider hitch you would want to go with a Sidewinder. For that you would need part # RP34FR which is a confirmed fit as a replacement for your 1621. This moves the pivot point back further...
    view full answer...
  • Is a Sidewinder Available for a 1998 NUWA SE 102?
    There may be a Sidewinder that will replace the pin box on your 1998 NUWA SE 102. 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. For example, Sidewinder # RP34FR will replace Fabex 663 and 665, Lippert 0719, 1621 and 1621HD, as well as M&M 663 and 665 pin boxes. I have added a link to our entire selection of Sidewinders for you to take a look at as well as a help article on Sidewinders you...
    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...
  • Troubleshooting 2013 Ram 3500 Where Pin Box Hitch Bed Rails Around Corners
    Does your truck have the Ramboxes? Typically that's the only bed style we've ever seen cause the clearance issue you mentioned. There is a fifth wheel towing solution that can work around that though. It requires swapping the pin box out on the trailer with a Sidewinder. The Sidewinders move the pivot point for the hitch up higher which allows the trailer to turn without hitting the bed rails. Sidewinders are pin box specific so you will first need to know what pin box you have now in...
    view full answer...
  • Does Wedge of Sidewinder Have to Remove When Locking Out
    To tow with a locked out Sidewinder will require you to not have any wedge attached to the pin box since it will need to pivot in that area and the wedge is what locks the Sidewinder to the hitch so that it pivots further back. So if your trailer saver requires a wedge you'd have to remove that if you wanted to lock out the Sidewinder. You should note that you don't have to lock out the Sidewinder just because you go with a long bed truck. The setup will still tow fine and actually would...
    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...
  • Locating Reese Sidewinder Pin Box for Aerolite 5th Wheel Trailer
    Reese Sidewinder pin boxes are designed to replace the factory pin box model on your trailer but trailer manufacturers don't often provide this type of information. The best method will be to try and locate the number that should be on the pin box itself or take a few measurements on the unit. I have attached an article that explains what measurements you will need to take. Different pin box models will have different bolt hole spacing, so these are the particular measurements that will...
    view full answer...
  • How To Pick Out Sidewinder Pin Box for Fifth Wheel Trailer
    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 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.
    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...
  • Are There Pin Boxes that are 12 inches Wide
    There are several pin boxes that are 12 inches wide. But we need several more dimensions to determine what pin a Reese Goose Box would fit since that's such a common dimension. I attached a link to an article that covers how to measure a pin box to determine which model it is. Also there is typically a sticker or plate on the pin box that has the model brand and number as well which would be all we would need.
    view full answer...
  • Determining The Correct Rotating Pin Box For A Winnebago Micro Minnie 2405 5th Wheel Trailer
    Pin boxes are bolt pattern specific so you would need to check the bolt pattern of the camper before purchasing to ensure that there is a compatible replacement. Manufacturers tend to either not list the pin boxes they use or have multiple pin boxes for a specific model camper. There are pin box bolt patterns that are non-replaceable so it's always best to ensure that you know the exact pin box bolt pattern on the trailer you wish to buy. The bolt pattern can be usually be found stamped...
    view full answer...
  • Availability of a Sidewinder King Pin for a Cherokee 235b 5th Wheel Trailer
    I can help you find a Sidewinder King Pin for your Cherokee 5th wheel trailer. However, there is a little more information that we will need to find the correct fit. To get the correct Sidewinder rotating turret and king pin for your 5th wheel trailer, we will need the pin box brand and model/part number off of the current pin box on the trailer. This info can be found on a label or tag that is attached to the pin box. For a16K king pin with rotating turret, we have seven different possibilities...
    view full answer...
  • How to Choose the Correct Sidewinder for a 1993 Jayco Fifth Wheel Series Eagle 305 RLR LP
    If the make and model of your pin box is not printed/etched on the box or mounting brackets then you have two options. You can either A) call the trailer manufacturer with your VIN or B) measure the bolt hole spacing using the attached help article. Once you determine which pin box is currently on your trailer, you can then use the attached article to make sure you get the correct replacement. The most common is the Sidewinder 5th Wheel King Pin with Rotating Turret part # RP34FR which...
    view full answer...
  • Recommended Torque for Locking Out a Reese Revolution Pin Box
    I spoke with my contact at Reese who said that the 3/4", 10 by 2" bolts used to lockout your (or any) Reese Revolution pin box should be torqued to 210 lb-ft. You will also need to make sure that you are using a conical washer and that you remove the wedge.
    view full answer...
  • Sidewinder Pin Box Replacement Recommendation for Cougar 28RDB Fifth Wheel
    From previous customers questions we have determined that the Cougar 28RDB comes with a Lippert 1621 pin box so for a Sidewinder you would want the part # RP34FR which is a confirmed replacement fit. I attached an install video for you to check out as well.
    view full answer...
  • Can Ram Truck with Ram Box Bed Rails Tow Fifth Wheel Trailer
    The problem with the Ram Box is that is that it puts the rails of the bed too close together and it causes interference with the pin box of the trailer around corners. We have heard several customers say that with a Sidewinder pin box they were able to tow a fifth wheel trailer with a truck with a Ram Box. Sidewinders move the pivot point higher so the Ram Box wouldn't interfere. The only problem is that Sidewinder hasn't officially said that you can use a Sidewinder with a truck with...
    view full answer...
  • Sidewinder for Keystone Challenger Fifth Wheel with Lippert Pin Box
    The Fifth Airborne Sidewinder part # RP34FR is the correct model for your Keystone Challenger with the Lippert 1621 pin box. I have included a link to this product, as well as its installation instructions. You can find the link below.
    view full answer...

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

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 Wilson B
Edited by:
Wilson B
Employee Joshua S
Video by:
Joshua S
Employee Alexander C
Written by:
Alexander C
Employee Michael B
Installed by:
Michael B
Employee Ryan G
Test Fit:
Ryan G
Employee Carrie F
Updated by:
Carrie F
Employee Justice A
Updated by:
Justice A

At we provide the best information available about the products we sell. We take the quality of our information seriously so that you can get the right part the first time. Let us know if anything is missing or if you have any questions.

Product Experts Available Now!
Call 1-800-940-8924