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Sidewinder Wedge for Curt E16 5th Wheel Trailer Hitches

Sidewinder Wedge for Curt E16 5th Wheel Trailer Hitches

Item # C16991
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Bolt this wedge onto your Sidewinder to prevent the Sidewinder's king pin from rotating in your Curt E16 fifth-wheel trailer hitch. 1-833-496-1390 to order CURT accessories and parts part number C16991 or order online at Free expert support on all CURT products. Guaranteed Lowest Price and Fastest Shipping for Sidewinder Wedge for Curt E16 5th Wheel Trailer Hitches. Accessories and Parts reviews from real customers.
  • All Info
  • Reviews (5)
  • Q & A (0)
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  • Why etrailer?

CURT Accessories and Parts - C16991

  • Fifth Wheel King Pin
  • Wedges
  • Curt 5th Wheel
  • CURT

Bolt this wedge onto your Sidewinder to prevent the Sidewinder's king pin from rotating in your Curt E16 fifth-wheel trailer hitch.


  • Prevents Sidewinder king pin from pivoting in your hitch
    • Works with Curt E16 5th-wheel trailer hitches
  • Bolts onto Sidewinder in place of universal wedge
  • Resists corrosion with durable carbide black powder coat finish

16991 Curt Locking Wedge for E 16 Fifth-Wheel Hitches

Customer Reviews

Sidewinder Wedge for Curt E16 5th Wheel Trailer Hitches - C16991

Average Customer Rating:  4.4 out of 5 stars   (5 Customer Reviews)

Bolt this wedge onto your Sidewinder to prevent the Sidewinder's king pin from rotating in your Curt E16 fifth-wheel trailer hitch.


Your customer service answered my questions faster than
I thought possible! I ordered a C16991 wedge for a reese revolution
pin box and the C16515 curt head assembly to fit my curt R5
roller hitch. You shipped them and kept me informed and they
arrived very quickly. I installed the head assembly and wedge,
and now am waiting to see how they work when I get our camper in 2
weeks. Keep up the Great Customer Service!


Reasonably priced and decent shipping t ime.


Product worked fine ...


Product delivered undamaged and meets my expectations.



See what our Experts say about this CURT Accessories and Parts

  • Can Curt E16 Fifth Wheel Hitch be Used with Reese Revolution Pin Box
    The Curt E16 fifth wheel hitches that have the slide bar jaw can be used with a Reese Revolution pin box. We even have a wedge that's designed specifically for fitting that hitch's jaw design as well, part # C16991. If the hitch is a slider hitch that is designed to slide back around corners you'll need to leave it in the slid forward position at all times.
    view full answer...
  • How Does Trailer Loading Affect Sway in Arctic Wolf 5th Wheel
    If you have noticeable sway from your Arctic Wolf 5th wheel and you cannot find anything wrong in the hitch, pin box, wedge, wheels or suspension on the trailer I recommend making sure that your specific loading of the trailer provides enough pin weight at the hitch. The optimal range for 5th wheel pin weight is 15 to 20% of the loaded trailer's gross weight. I suggest confirming both the gross weight and pin weight of the loaded trailer when it is all set for the road. I suggest aiming...
    view full answer...
  • Bolt Size Of Wedge For Curt E16 5TH Wheel Hitch Used With Sidewinder Pin Box
    The Sidewinder Wedge for Curt E16 5th Wheel Trailer Hitches # C16991 uses 5/8"-11 bolts that are 2" long.
    view full answer...
  • Comparing Reese and Curt Sidewinder Wedges for Curt E16 5th Wheel Trailer Hitch
    The Reese custom wedge # 30861 is flared out at one end so it should fit and lock out the pivot at the E16 hitch better than the rectangular Curt wedge # C16991. But since both fit the same hitch you could go with either one. As long as the wedge you use successfully locks out the pivot at the hitch then it will work.
    view full answer...
  • Orientation of Wedge for Curt A16 and E16 Fifth Wheel Hitches on Sidewinder/Reese Revolution
    I attached a picture that shows how the E16 wedge part # C16991 and Q16 wedge part # C16992 install on a Sidewinder or Reese Revolution pin box.
    view full answer...
    Image 1 for
  • Which Sidewinder Wedge For Older Curt E5 5th Wheel Hitch?
    I have another option for you, but the Sidewinder Wedge for Curt A Series 5th Wheel Trailer Hitches # C16992 you were looking at is only a fit for the Curt A Series 5th wheel hitches and will not work with your Curt E5 5th wheel hitch. Instead you will need the # C16991 which will allow you to tow your trailer with a Reese Revolution Pin box and will fit your hitch perfectly.
    view full answer...
  • Problems Unhooking Trailer with Sidewinder King Pin from Curt 5th Wheel Hitch
    You may want to check out the Sidewinder Wedge Kit for Curt E-16K Fifth Wheel Hitch # 30861. If you are using a universal wedge, it could be your problem. Curt also offers a wedge for the E16, part # C16991. I recommend the Reese wedge # 30861. This wedge is more of a custom fit than the Curt # C16991 wedge.
    view full answer...
  • Curt 5th Wheel Hitch Head & Wedge for Q20 Used with Reese Revolution Pin Box
    The Curt Q20 Sliding 5th wheel hitch # C16536 will accept the E16 head assembly # C16515 and will require wedge # C16991. I confirmed compatibility with my contact at Curt. You will want to keep the slider locked in the forward position at all times when using a Revolution/Sidewinder pivoting pin box.
    view full answer...
  • Custom Brackets for 5th Wheel Rails on 2005 Nissan Titan
    Sure thing. You will just need the Curt Fifth Wheel Installation Bracket Kit - Nissan Titan # C16470 which is a custom fit for your standard rails. If your Curt E-16 is not a slider, you will also want the slider base # C16560 if you have the 6-1/2 foot bed. If you have the shorter bed you will need a rotating pin box for turning clearance.
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  • Can a Sidewinder Pin Box be Used with a Curt E-16 5th Wheel Trailer Hitch
    Yes, the Curt E-16 5th wheel hitches such as # C16115 are compatible with Reese Sidewinder replacement pin boxes. If your E-16 hitch is a slider hitch then it will have to stay locked in the tow position at all times when using it with a Sidewinder like the # RP61412. The only thing I recommend to add is the custom wedge for Curt E-16 hitches # C16991. The custom wedge ensures the best fit between the Sidewinder and the hitch.
    view full answer...
  • Best Sidewinder Wedge Kit Fit for the Curt E16 5th Wheel Trailer Hitch
    I reached out to my contact at Curt and they advised me that once you actually bolt the Sidewinder Wedge # C16991 on the Sidewinder there should not be any wiggle room. The Sidewinder Wedge Kit for Curt E-16K Fifth Wheel Hitch # 30861 will provide the same fit as the # C16991. I recommend using the # C16991 or the # 30861 instead of the Replacement Universal Wedge for 5th Airborne Sidewinders # 201100 because they are specifically made for the Curt E16 5th Wheel Trailer Hitch.
    view full answer...
  • Recommended Wedge For Curt Fifth Wheel Hitch To Use Sidewinder Pin Box
    I am sorry to hear you are having issues with your fifth wheel hitch! Depending on what model Curt Fifth Wheel hitch you have there are wedges that will allow the hitch to be used with sidewinder rotating pin box, but the Q Series hitches are not compatible with Wedges and cannot be used with rotating pin boxes. For example if you have a Curt A Series Hitch you will need Wedge # C16992, or if you have a Curt E16 Hitch you will need Wedge # C16991. If you do not have either of these...
    view full answer...
  • Can Curt E16 Fifth Wheel Trailer Hitch Be Used with 2015 Chevrolet Silverado 1500 5-1/2 Foot Bed
    It sounds like you'd like to install the Curt E16 Fifth Wheel Hitch # C16115 into your 2015 Chevrolet Silverado 1500 with a 5-1/2 foot bed. This will be no problem at all if your truck already industry standard rails installed. If not you can add them. I suggest the Reese Custom Base Rails Kit # RP50064-58. The custom kit will be much easier and faster to install than a universal kit. It will also work with your Sidewinder pin box. You'll need the wedge, part # C16991 if you don't...
    view full answer...
  • Lightest 5th Wheel Hitch for 2017 Nissan Titan XD with Factory Gooseneck and Revolution Pin Box
    The easiest and lightest 5th wheel hitch available that will attach to the factory gooseneck pucks in your 2017 Nissan Titan XD and is compatible with a rotating pin box is the Curt E16 # C16515-16026. This hitch features an overall weight of 195 pounds but one of its benefits is that it uses a 2-pin head removal design that lets you easily take the hitch out of the bed in a couple of more manageable pieces. For reference the head assembly by itself weighs 68 pounds and the base weighs...
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  • Is The Curt E16 5th Wheel Hitch Compatible With A Reese Sidewinder Pin Box
    Yes, the Curt E16 5th Wheel Trailer Hitch # C16115 is compatible with the Reese Sidewinder 5th Wheel King Pin with Rotating Turret # RP34FR you referenced. You'll just need the Sidewinder Wedge for Curt E16 5th Wheel Trailer Hitches # C16991 to prevent the king pin of the pin box from rotating in the jaws of your Curt E16 hitch.
    view full answer...
  • Is the Curt E16 5th Wheel Trailer Hitch # C16515-16021 Compatible with a Turning Point Box
    The Curt E16 5th Wheel Trailer Hitch for Ram Towing Prep Package - Slide Bar Jaw - 16,000 lbs # C16515-16021 is compatible with a turning point pinbox like the Reese Sidewinder 5th Wheel King Pin with Rotating Turret - 20,000 lbs # RP34FR. You will need to use the Sidewinder Wedge for Curt E16 5th Wheel Trailer Hitches # C16991 with the Reese Sidewinder, to keep it from pivoting in the hitch. For your 2021 Ram 2500 I believe the turning point pinbox is the better option. I feel this way...
    view full answer...
  • Recommended Reese 5th Airborne Air Ride Sidewinder to Replace Norco/BAL Pin Box
    The manufacturer of your current pin box tells me that the bolt pattern matches up with a Lippert 1621 pin box, so for an Air Ride Sidewinder that would provide the proper clearance between the front of your fifth wheel and the back of your truck cab, you'd want to use part # RP61422. The air ride Sidewinder would relocate the pivot point between the hitch and the king pin 22 inches rearward to the point where the pin box attaches to the underside of the trailer loft. The Sidewinder includes...
    view full answer...
    Image 1 for
  • Parts Needed to Tow 5th Wheel Trailer With 5 Foot 7 Inch Bed on 2014 Ram 1500
    So because you have a 5 foot 7 inch bed, with your 2014 Ram 1500, unless you get a Sidewinder rotating king pin, the 5th wheel trailer will crash into your truck if you make anything resembling a tight turn. While not inexpensive, this is legitimately the only option available to tow with that short of a bed without damaging your truck. That said, we can get you what you need, starting with the 5th wheel hitch, and the most economical hitch and base rail kit for your truck is from Curt: -...
    view full answer...
  • Replacement Wedge for Reese Revolution/Sidewinder Rotating 5th Wheel Pin Box
    If the wedge on the Revolution is showing wear, it's definitely a good idea to replace it, as it could allow some side to side movement of the pin box at the king pin which is undesirable. This usually occurs when a universal wedge is used. They fit fairly well, but because they don't completely conform to the hitch funnel in the skid plate, wear can occur over time. The wedges are hitch specific, the exact wedge needed will be determined by the 5th wheel hitch you're using. For Curt...
    view full answer...

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Info for this part was:

Employee Lindsey S
Written by:
Lindsey S
Employee Jameson C
Expert Research:
Jameson C
Employee Adam R
Expert Research:
Adam R
Employee Chris R
Video by:
Chris R
Employee Wilson B
Updated by:
Wilson B
Employee Kristina F
Updated by:
Kristina F
Employee Isabelle B
Updated by:
Isabelle B
Employee Robert C
Test Fit:
Robert C

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