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: $1,668.99
You Save: $52.95
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.


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.


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.


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

  • 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...
  • Why Cant Lippert 1621HD Pin Box be Swapped Out for Short Pin Box
    The different styles of pin boxes like telescoping, medium, long, short etc. are listed as a way for you to identify what you currently have. You cannot swap out one style of pin box for another as it does not work like that unfortunately. If you want to see all of the pin boxes we offer that fit as a replacement for your Lippert 1621HD check out the link I attached below. The most popular is the Sidewinder part # RP34FR which moves the pivot point back and allows short bed trucks to not...
    view full answer...
  • Sidewinder 20,000 Pound Fifth Wheel Trailer Pin Box to Replace Lippert 1621 Pin Box
    The 20,000 pound Sidewinder that will replace a Lippert 1621 and a 1621HD pin box is the # RP34FR.
    view full answer...
  • How To Determine What Sidewinder Will Replace 2012 Heartland Express Pin Box
    The best way to find out if the Sidewinder, part # RP34FR will fit your Heartland Express is to have the part number of the king pin you have installed. If the numbers are not visible and if it is the original king pin, you may be able to use the VIN of the trailer and check with the retailer who sold it. They would have a list of all the components that were installed on the trailer. If that doesn't work you can use the attached helpful article and measure the pin box you have to determine...
    view full answer...
  • What Bolts Are Needed To Lock Out Reese Sidewinder 5th Wheel King Pin
    In order to lock-out the turret on a Reese Sidewinder 5th Wheel King Pin like part # RP34FR you will need to use two grade eight 3/4"-10 x 9" hex bolts and the corresponding lock nuts and washer. Unfortunately, we do not carry this size bolt so I cannot provide an exact part number but you should be able to find these at a local hardware store. Please note, you also will need a torque wrench capable of 275 ft. lbs. and a 1-1/4" socket.
    view full answer...
  • Which is Better, Reese Revolution/Sidewinder or Pullrite Superglide Hitch Setup
    Hands-down I'd recommend a Revolution pin box with a fixed hitch over a Pullrite slider hitch. Fixed hitches weigh less (easier to install/remove, especially over a Pullrite which is a monstrosity!), have less moving parts, and don't require as much maintenance. Plus the Revolution not only helps with tight turns it also makes reversing in general easier and the trailer tracks better behind the vehicle going forward around tight turns. Reese Revolution pin boxes are the same thing as the...
    view full answer...
  • Compatibility of Reese Evolution With Rambox
    The Reese Evolution, which is the OEM version of the Sidewinder King Pin such as # RP34FR, does work with trucks that have a Rambox. There is also a formula you can use to determine if using that pin box will allow you to make a 90 degree turn. You will first need to measure the distance from the center of your fifth wheel hitch jaw to your 2016 Ram 2500's cab.You will also need to know the width of your trailer. You can then use this formula to find out if you can do a 90 degree turn: (A...
    view full answer...
  • Normal Clearance for Towing 96 in Wide Fifth Wheel Trailer with Sidewinder in 5-1/2 foot Bed Truck
    1 inch to spare is pretty darn tight but is somewhat normal for towing as wide of a trailer as what you have with a truck that has a 5-1/2 foot bed. Basically you would be able to tow with your current setup but you need to be very careful around corners. Especially if there is an elevation change happening as well.
    view full answer...
  • Typical Pin Box Bolt Torque Dimensions
    Pin box bolt torque is based on the size of the bolts. 1/2 inch Bolts GR5 90 ft-lbs 5/8 inch Bolts GR5 150 ft-lbs 3/4 inch Bolts GR5 275 ft-lbs
    view full answer...
  • What is Maintenance Schedule for Sidewinder Pin Boxes
    The maintenance the Sidewinder recommends for your Sidewinder is: BEFORE EACH TRIP: 1. CHECK YOUR EQUIPMENT: Check that condition of all of your towing equipment and keep it in top condition. 2. Check that the torque of the (4) cap bolts is 45 ft-lbs. 3. Check to see that all bolts are properly tightened. 4. Check wedge engagement in the fifth wheel jaw, refer to wedge adjustment portion of installation instructions. MAINTENANCE: 1. For ease of hookup; frequently lubricate the wedge...
    view full answer...
  • Does Sidewinder Pin Box Make Reversing Easier or More Difficult
    Backing up a trailer with a Sidewinder pin box would be basically the same as backing up a trailer with a standard pin box. If anything people claim the Sidewinder allows for an easier backing up experience since the pivot point is moved back. You would have had to been in an extremely tight turn to jacknife a trailer with a Sidewinder. If you fast forward to the 2:30 mark of the video I attached below you'll see a Sidewinder get connected to a fifth wheel hitch as well as disconnected....
    view full answer...
  • How To Identify Fifth Wheel Bolt Pattern on a DRV Mobile Suites 40 KSSB4 5th Wheel
    There is not a cross reference for 5th Wheel RV's that allows me to look up what pin box you have on your DRV Mobile Suites 40 KSSB4 5th Wheel. To replace your pin box you need to know what bolt pattern you have, this is expressed as a 4 digit number. Please look on the currently installed pin box for identification markings/stickers to discover what pin box you currently have. Note the linked article that will step you through how to measure the bolt pattern if there are no identifying...
    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...
  • Can Ram Truck with Ramboxes Tow a 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...
  • Recommended Sidewinder For 1978 Globe Star 5th Wheel
    I reached out to my contact at Reese, and they said that you may need to remove the metal to weld to the frame since you don't have bolt holes, but it is a possible fit. The model you would want is the Sidewinder 5th Wheel King Pin with Rotating Turret - 16,000 lbs # RP34FR, which although will require custom welding, most likely will fit based on your measurements.
    view full answer...
    Image 1 for Image 2 for Image 3 for
  • Is Sliding 5th Wheel Hitch Needed with Reese Sidewinder on Trailer
    A sliding fifth-wheel hitch is not needed when using a Sidewinder. A Sidewinder will move the pivot point 22 inches behind the king pin to provide enough clearance when making sharp turns with your trailer. If you do not yet have a Sidewinder installed on your trailer, you will just need to locate the existing pin box number. This can be found either on a sticker or stamped into the pin box itself. I have attached an article on Sidewinders that includes a conversion you can reference to...
    view full answer...
  • Recommended Sidewinder Pin Box To Replace Trailair Rota-Flex Pin Box
    If your Trailair Rota-Flex is designed to replace a Lippert 1621 pin box then the Sidewinder pin box replacement I recommend is part # RP34FR. This pin box has a 20,000 lb capacity, and will move the pivot point an extra 22 inches toward the rear of your tow vehicle so you can execute 90-degree turns. If your original pin box was not a 1621, let me know and I will be glad to see if we have a Sidewinder that will work for your trailer.
    view full answer...
  • Correct Replacement Sidewinder for Trailair 1621 or 0719 Pin Box Compatible with Comfort Ride Hitch
    I spoke with my contact at Lippert Components who said that the serial number on your Trailair pin box indicates that it is either a 1621 or a 0719 pin box. The Sidewinder that works with both bolt patterns is part # RP34FR which is rated for 20,000 lbs. I noticed in your picture that your current pin box is rated for 21,000 lbs so you will want to make sure that the 20,000 lb capacity for this Sidewinder (which is the highest weight rated Sidewinder) is safe to use with your trailer. All...
    view full answer...
    Image 1 for
  • Correct Reese Sidewinder/Revolution Pin Box for Grand Design Reflection 337RLS
    The Reese Sidewinder 5th Wheel King Pin with Rotating Turret part # RP34FR is correct and a confirmed fit for a Grand Design Reflection 337RLS. The upgrade is safe and maintains the factory warranty.
    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...
  • Do I Need a Sidewinder with a 2016 Ram 2500 with Ramboxes
    Unfortunately, the Ramboxes make the bed rails too narrow for a standard fifth wheel trailer pin box to be able to make turns without causing interference. The only way to tow a fifth wheel trailer with a vehicle that has a Rambox is to use a Sidewinder pin box on the trailer. You should note that Sidewinder has not tested this, but we know from our customers who have tried this setup that the Sidewinder will give the Rambox trucks the ability to tow a trailer. Sidewinders are pin box...
    view full answer...
  • Availability of Sidewinder Pin Boxes Rated for 20,000 lbs
    We do have some Sidewinder options that are rated for 20,000 lbs but they are pin box specific so you will need to make sure you have the correct one. A Revolution and a Sidewinder pin box are the same thing. The only is that the Revolution is what it is called when it is an OEM pin box and it is called a Sidewinder if it is aftermarket. The following Sidewinders are rated for 19K and replace these popular pin boxes: Part # RP34FR- Lippert 1621, 1621HD, and 0719 Some of these are compatible...
    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