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  9. M and M 665
Reese Sidewinder 5th Wheel King Pin with Rotating Turret - 20,000 lbs

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

Item # RP34FR
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Fifth Wheel King Pin
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Shipping Weight: 205 lbs
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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 800-298-1624 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

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

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

Customer Reviews

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

Average Customer Rating:  4.7 out of 5 stars   (10 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.

- RP34FR

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.

- RP34FR

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.

- RP34FR

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.

- RP34FR

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

- RP34FR

The sidewinder is an Awesome Product thanks etrailer!!

- RP34FR

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

- RP34FR

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

- RP77FR

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

- RP77FR

Review from a similar Sidewinder in Fifth Wheel King Pin

- RP77FR

Review from a similar Sidewinder in Fifth Wheel King Pin


Ask the Experts about this Reese Fifth Wheel King Pin

  • 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...
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  • Can I Use the Mopar M20 5th Wheel Hitch with a Reese Sidewinder?
    Unfortunately the Mopar M20 hitch you have is the same hitch as the Curt Q20 # C16130 hitch, which has a spherical axial bearing to improve the pivoting of the hitch head; because of this 360-degree pivot, it is not compatible with a pivoting pin box like the Reese Sidewinder # RP34FR. It is not possible to lock out the head with any type of wedge, so there would be two pivot points in the towing setup, which would not work. Because of the shorter bed in your 2019 Ram 3500, you do need...
    view full answer...
  • Can Curt A16 Head Replace Curt M20 for 2017 Ram With Puck System, and Sidewinder for Lippert 1116
    Okay, there's quite a bit to unpack here so to make things easier I am going to take your questions one at a time. 1) Your Ram OEM M20 hitch is the same as the Curt Q20 Curt Q20 5th Wheel Trailer Hitch # C16530-16021; it uses the same legs so you can replace the head with the Replacement Head Unit for Curt A20 # C16540 or the Replacement Head Unit for Curt A16 # C16520. 2) The Sidewinder Wedge Kit for Curt A16 Fifth Wheel Trailer Hitch # RP31016 is correct for the A16 or you can...
    view full answer...
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  • Recommended Air Ride Sidewinder Replacement For Lippert 1716 Pin Box
    We do indeed offer an air-ride Sidewinder model that's a replacement for the Lippert 1716 pin box. I'd recommend part # RP77FR which would be compatible with the B&W Companion for Ford Pucks, like part # BWRVK3300. You'll also need a B&W specific wedge, part # SWW-06 to prevent the king pin from rotating in the hitch jaws. I've linked to some videos that you might find helpful.
    view full answer...
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  • 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...
    Image 1 for
  • Best 5th Wheel Hitch for Sidewinder on 2020 Ford F-350 Short Bed With Factory Prep Package Pucks
    Let's go ahead and start with the best 5th wheel hitch for your 2020 Ford F-350 short bed with the factory prep package to use with a Sidewinder, which is the B&W Companion OEM 5th-Wheel Hitch for Ford Super Duty Prep Package # BWRVK3300. This hitch - which has a 20,000 lb capacity - is considered by most to be the best 5th wheel hitch on the market because of its immense jaws and cushioned bushings, which combine to give you the most comfortable and quiet towing experience possible....
    view full answer...
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  • How To Tow a 5th Wheel Trailer With a 2020 Ram 1500 with RamBox
    In order to tow a fifth wheel trailer using a 2020 Ram 1500 with RamBox you'll indeed need to use a rotating pin box like the Reese Sidewinder which will be specific to the trailer. If the trailer uses a Lippert 1621 then the correct Reese Sidewinder 5th Wheel King Pin with Rotating Turret is part # RP34FR. Then, you can complete the setup with the Reese Quick-Install Custom Outboard Installation Kit part # RP56018-53 and Reese 5th Wheel Trailer Hitch part # RP30047. The Sidewinder Wedge...
    view full answer...
  • 5th Wheel Hitch and Parts Needed to Tow 2014 Ram 2500 With RamBox
    In order to tow a 5th wheel with a 2014 Ram 2500 with the RamBox cargo management you will need a Sidewinder in order to allow the proper clearances so the pin box does not hit the RamBoxes. To find the correct Sidewinder what you will need to know is the manufacturer and model number of the pin box on your fifth wheel and match that with the correct replacement, such as the Sidewinder # RP34FR. This will replace Lippert 0719, 1621 and 1621HD, Fabex 663 and 665, M&M 663 and 665, along...
    view full answer...
  • Sidewinder Wedge for 20,000 lb Reese M5 5th Wheel Hitch
    The correct wedge for use with a Reese Sidewinder # RP34FR and the Reese M5 5th Wheel Trailer Hitch # RP30921 is the following: - Sidewinder Wedge Kit for 20,000 lb Reese ELITE, M-Series, or Pro Series 5th Wheel Trailer Hitches # RP44FR.
    view full answer...
  • Reese5th Wheel Hitch & Base Rails for 2019 Ford F-150 With 5-1/2 Foot Bed & Sidewinder
    We do have a 5th wheel hitch and base rails that will work with a Sidewinder for your 2018 Ford F-150 with a 5-1/2 foot bed, though the part number you gave is just the head unit of a Reese Pro Series hitch, so you'll need the full set up. The parts you need are the following: - Reese 5th Wheel Trailer Hitch # RP30047 - Reese Semi-Custom Base Rail and Installation Kit for 5th Wheel Trailer Hitches - Ford F-150 # RP30035-31 - Sidewinder Custom Wedge # SWW-03 - Bargman 5th Wheel/Gooseneck...
    view full answer...
  • Pin Box And 5th Wheel Hitch Upgrade For 2019 Ram 3500
    I called Lippert and found out your pinbox is a 1621. So the Reese Sidewinder 5th Wheel King Pin with Rotating Turret - 20,000 lbs # RP34FR will be the replacement you need if you want to go with a rotating turret. Because you have the RAM box the sidewinder is the only option for you. A gooseneck or a slider will not work with RAM boxes. I would pair it with the Reese M5 5th Wheel Trailer Hitch - Single Jaw - 20,000 lbs # RP30928 it can raise up to 18 inches. It will work with your...
    view full answer...
  • Which Sidewinder Will Replace Lippert 1116 Pin Box
    For replacing a Lippert 1116 pin box the correct 20k Sidewinder is the part # RP77FR. Then for the wedge for the pin box to fit the hitch you'd need the part # RP31016 and you'd be set.
    view full answer...
  • Sidewinder Pin Box Replacement That Fits 2011 Forest River Microliter
    I sent your pin box info to Lippert and they informed me that you have a 1621 pin box model so for a Sidewinder you'd need the # RP34FR for a standard model or the part # RP61422 for a cushioned model that has the 5th Airborne air ride system builtin. This would work great with the Reese hitch part # RP30047 and then for the correct wedge you'd want the part # SWW-03.
    view full answer...
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  • Can a 2020 Ram 2500 with Rambox Tow Fifth Wheel Trailer
    There is a way to to a fifth wheel trailer with your 2020 Ram 2500 that has the Ramboxes but you have to install a Sidewinder pin box on the trailer so that the pivot point is raised up high enough that there isn't interference between the pin box and the truck bed rails when turning. If you check out the picture I attached you can see what I mean. Sidewinders like the # RP3FR are pin box specific so you will first need to know what pin box you have now in order to pick out the correct...
    view full answer...
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  • Can You Use A Reese Sidewinder With A Long Bed Truck
    Yes, you can use the Reese Sidewinder 5th Wheel King Pin With Rotating Turret # RP34FR with your long bed truck. As long as you're not planning on using a Curt Q series hitch, PullRite SuperGlide hitch, Reese Trail Boss, B&W Companion hitches that mount in the Turnoverball gooseneck hole, Colibert 208BW hitch, Hi-Rise gooseneck-to-fifth-wheel adapter by Draw-Tite, Hidden Hitch, Bulldog and Reese, or any other gooseneck-to-fifth-wheel adapter.
    view full answer...
  • Wedge for Reese M5 Fifth Wheel Hitch and Sidewinder in 2019 GMC Sierra 3500HD
    I spoke with a representative of Reese who said that the Reese M5 5th Wheel Trailer Hitch # RP30890 does not have a custom wedge. The Sidewinder # RP34FR comes with a universal wedge, part # 201100 that you will use with your hitch. This is a great set up you have chosen for you 2019 GMC Sierra 3500HD; the Reese M5 hitch will fit directly into the puck system of your truck and has a unique jaw system called a "Talon" which is a single-piece jaw that will wrap fully around your Sidewinder's...
    view full answer...
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  • How To Determine What Reese Sidewinder Pin Box Fits a Dutchmen Royal 5th Wheel
    If there is no tag or sticker on the pin box itself that can be used to identity the model number then you will need to measure the bolt pattern and then use the chart in the link below to match this up with a model number. The Reese Sidewinder Fifth-Wheel Pin Box part # RP34FR fits the most common model which is a Lippert 1621.
    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. 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 and only has a 16K capacity while the RP34FR has a 20K capacity.
    view full answer...
  • 5th Wheel Trailer Hitch and Installation Kit Recommendation for a 2014 Ford F-150 Short Bed
    For a 5th wheel trailer hitch that, when removed, leaves a clean bed in your 2014 Ford F-150 short bed you can use the B and W installation kit # BWGNRK1104-5W with slider Companion 5th wheel trailer hitch # BWRVK3400-5W. The slider provides 12 inches of travel for clearance when making tight turns. To determine if the slider hitch will provide enough clearance you will have to take some measurements. Once installed the centerline of the hitch will be approximately 45-1/8 inches forward...
    view full answer...
  • Fifth Wheel Hitch Recommendation and Sidewinder for 2019 Ram 2500 with Ram Boxes
    There are great hitches you can use with your 2019 Ram 2500 but the first thing to note is that since you have Ram Boxes you are going to need to use a Sidewinder pin box in order to move the pivot point rearward to give you the needed clearance to make turns with a fifth wheel hitch in your truck. To find the correct Sidewinder what you will need to know is the manufacturer and model number of the pin box on your fifth wheel and match that with the correct replacement. For example,...
    view full answer...
  • Does Reese Revolution Rotating Pin Box Need to Be Locked Out When Towing With Long Bed Truck
    Since you have a long bed truck, it doesn't really matter one way or the other if you lock out the Revolution/Sidewinder like the # RP34FR so the king pin rotates at the hitch, rather than the rotation happening occurring at the turret where the pin box meets the 5th wheel. If you wish to lock out the Revolution, follow the instructions I've screenshot for you. If it were me, I'd just leave things as they are now, since it makes no difference one way or the other. I've linked you...
    view full answer...
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  • 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...
  • Which Wedge to Use with Sidewinder Pin Box and B and W Companion Hitch
    The wedge needed for Sidewinders like the part # RP34FR with Companion hitches is part number # RP74FR .
    view full answer...
  • Does Towing With A Reese Sidewinder/Revolution Increase The Likelihood Of Sway
    The Reese Sidewinder and Reese Revolution are the same thing, they only call the pin boxes the Revolution when they are on the trailer from the trailer manufacturer. The after market part is called a Side Winder and they are available for purchase. To choose a Sidewinder, you would need to know your pin box number to get the correct fit. For example the # RP34FR will fit a 1621 bolt pattern, which is the most common pattern among manufacturers. We have never had anyone complain about...
    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...
    Image 1 for
  • More Clearance for Short Bed With Atwood AB72 Pin Box
    I can help you figure out how to get more turning clearance with your short bed truck. Due to the style of the Atwood pin box you have on your trailer the Sidewinder is not recommended to be used. An alternative to this would be a sliding hitch. A sliding hitch will give you turning clearance for your trailer just not the 90 degrees that the Sidewinder provides. I really like the Demco Hijacker AutoSlide's, # DM8550035, technology because you never have to get in or out of your...
    view full answer...
  • 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...
    view full answer...

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Used Items Available
Used Picture for Reese Sidewinder 5th Wheel King Pin with Rotating Turret - 20,000 lbs
Used Picture for Reese Sidewinder 5th Wheel King Pin with Rotating Turret - 20,000 lbs

Condition: Installed

Notes: Item has been previously installed/test fitted. Cosmetic signs of install are present. All parts are present.

Our Price: $1,420.98
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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 Alexander C
Written by:
Alexander C
Employee Michael B
Installed by:
Michael B
Employee Ryan G
Test Fit:
Ryan G

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