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  3. Weight Distribution Hitch
  4. Shanks
  5. Fits 2 Inch Hitch
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  7. Round - 6-1/2 In Drop
Pro Series Weight Distribution Shank - 14" Long - 4-3/4" or 6-1/2" Drop - 1.5K TW

Pro Series Weight Distribution Shank - 14" Long - 4-3/4" or 6-1/2" Drop - 1.5K TW

Item # RP63971
Our Price: $201.43
You Save: $154.23
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Shipping Weight: 22 lbs
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Shank offers a 6-1/2" drop when used with round-bar systems and a 4-3/4" drop when used with trunnion-bar models. Cannot be used in rise position. 1-800-940-8924 to order Pro Series accessories and parts part number RP63971 or order online at Free expert support on all Pro Series products. Great prices and Fastest Shipping for Pro Series Weight Distribution Shank - 14" Long - 4-3/4" or 6-1/2" Drop - 1.5K TW. Accessories and Parts reviews from real customers.
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  • Reviews (62)
  • Q & A (0)
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  • Why etrailer?

Pro Series Accessories and Parts - RP63971

  • Weight Distribution Hitch
  • Shanks
  • Fits 2 Inch Hitch
  • Trunnion - 4-3/4 In Drop
  • Round - 6-1/2 In Drop
  • Pro Series
  • 1500 lbs TW
  • 15000 lbs GTW

Shank offers a 6-1/2" drop when used with round-bar systems and a 4-3/4" drop when used with trunnion-bar models. Cannot be used in rise position.


  • Designed for use with either round-bar or trunnion-bar weight-distribution systems
  • Provides drop only
  • Finished with black powder coat


  • Fits: 2" x 2" trailer hitch receivers
  • Tongue weight: 1,500 lbs
  • Holes are 3/4" in diameter and 1-1/4" apart on center
  • Round-bar system:
    • Distance from center of ball hole to hitch pin hole: 15"
    • Drop: 6-1/2" from top of hitch receiver tube opening
  • Trunnion-bar system:
    • Distance from center of ball hole to hitch pin hole: 14-3/8"
    • Drop: 4-3/4" from top of hitch receiver tube opening
  • Shank bar length: 14"
  • Shank bar height from top of shank to bottom: 10-7/8"
  • 10-Year limited warranty

63971 Pro Series Adjustable Weight Distribution Hitch Bar

Replaces 3211, 3213, and 54917

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Pro Series Weight Distribution Shank - 14" Long - 4-3/4" or 6-1/2" Drop - 1.5K TW - RP63971

Average Customer Rating:  4.9 out of 5 stars   (62 Customer Reviews)

Shank offers a 6-1/2" drop when used with round-bar systems and a 4-3/4" drop when used with trunnion-bar models. Cannot be used in rise position.


I have traveled about 5,000 miles with this shank and have had no issues. Tow a 30-foot travel trailer with a 2500 Duramax. The long extension and drop range are perfect.


I needed a shank that allowed a greater drop for my weight distribution hitch. Finding the right one was not easy. Paul was extremely patient and really helpful in finding one that would do the trick. The new one is perfect. No one has better service than etrailer.


Did the job for my lifted truck. Those etrailer boys are are great. They’ll hook ya up on all ur trailer stuff.


Am quite happy with eTrailer. Their website provides more detailed info than the manufacturer's! Getting ready for the summer boating season... Needed a longer hitch bar so could open tailgate with trailer hooked up. This was exactly as specified and works great. Have used eTrailer several times now and service has always been among the best...quick, accurate, and good prices.


I normally tow my vintage Airstream with a vintage, 3/4-ton Suburban whose 7.4l engine has quite the taste for mid-grade gasoline. Economics has forced me to consider towing with my wife's '09 Yukon which has an incredibly high receiver hitch. Etrailer had just the shank I needed (the black part in the picture) at a great price to make everything work. And it got here quickly. I'm now literally a happy camper.


Needed this for my Reese SC weight distribution hitch. It was a necessity due to how low my 2012 jeep Srt8 and haulmark low hauler are to the ground. Great customer service and fast shipping.


Found what I was looking for. Fast free shipping


Unfortunately, etrailer sent the wrong size. Fortunately, they will send the correct size. I had originally called them and explained that my TT's tongue was too short and the TT was hitting & breaking my taillights. A nice person checked what I might need and said a longer shank would work--RP63971. Unfortunately it was not the correct information and the shank that I was told would work, was not the best one for my application. I found a shank that would appear to work better. etrailer will be sending that longer shank (EQ90-02-4500 when they get it at the end of November). The return guy understood what the problem was and said just return the one I didn't want. No hassle.


Worked great. The pictures show how the extra length that is given. In my case I needed 2 more mounting holes down. This one gave me 3. I needed after I moved to a 4 wheel drive truck.


My trailer sits very low by design. When towing it tows with the tail down. Not a performance issue at all. But it looks funny. I needed to lower the ball 2 inches for it to look sharp when towing.

The Q and A at etrailer had a video showing all of the dimensions. This made my selection of this drop shank certain.

Product arrived in just a few days. thanks etrailer

The ped shank has worked perfectly. The trailer tows level reducing the amount of the trailer front surface from the wind resistance.But the best part is the trailer looks so sharp being towed level.I am looking forward to shopping a E-trailer in the future. Thanks
Peter S - 02/04/2015


We bought a new pick up truck that sits 6" higher than our old truck. This draw bar has a greater drop than the old one and allowed me to use the rest of my weight distribution hitch.

After using the draw bar for a year with my 24 Haulmark Edge trailer, all is well. The trailer sits level, it tows great, the weight distribution system works as designed. Im happy.
Charles S - 06/04/2016


This is a heavy shank that is needed for our trucks height. The bottom 2 bolt holes brings the ball to the right height for the camper which was riding to high on the previous shank. E-Trailer was very quick to ship as it only took 3 days from ordering to install. Very good company to shop with!

Its been 1 year on this hitch setup and a good one also. This hitch system is better performing than the friction sway control we had previously as it out performs the old system drastically. It actually wants to correct wind sway the way sway controls should! The only option I should have gone with is getting the 2-1/2 in shank instead of the 2 shank.
Brad - 06/25/2017


After upgrading from a 1500 to 2500 Ram 4x4 I needed a shank with a six inch drop to use with my 49901 Pro Series distribution hitch. The RP63971provides enough drop and also moves the ball away from the bumper a little more allowing additional clearance for the tailgate when it is open. This shank is lighter than the one I replaced due to the U shape of the section where the ball mount bolts on. That's a plus, but because of the U shape you cannot use the angel adjustment rivet, washers and set screw that are used with the 49901 hitch to lock in the angel of the ball mount. I had concerns the tension on the bolts holding the ball mount on would not be enough to maintain the correct angle so I took a piece of 1/4" steel plate 6" long and slipped it in between the ball mount and shank. This provided a solid stop for the rivet and set screw.


I purchased a new 2017 ford f250 to pull our 32 ft bumper pull camper. I noticed I had some trailer sway at highway speeds and the ball was just too high. I had no more adjustment on the shank I had. This one I purchased gave me extra adjustment and now the trailer tows perfect. The shipping was really fast. Also for pet owners now my tailgate can drop down so the dogs can jump into the back of the truck while the camper is hooked up


When I switched to a bigger tow vehicle I needed a longer shank to increased the hitch drop another 2.25 inches to keep my trailer level. The detailed info on the product page gave me what I needed to know -
63971 would provide the drop I needed but would not be too long to cause bottoming-out concerns. After installation the hitch mount sits at the desired drop and still has 2 adjustment holes at the top of the shank and 1 at the bottom - perfect! Also, ET's price + shipping was very competitive and delivery was prompt.


Exactly what I needed to get my truck and trailer level again after my new tire upgrade. Everything trailer comes from you guys.

As good as the day I wrote the review and as I stated everything trailer comes from etrailer. Just added a second sway control to my setup since we have a 26+ pull behind. Best company and service hands down.
Josh R - 08/03/2018


with a higher truck and a lower camper the hitch I was sold from the dealer did not work I bought this from E-trailer to fix my problem of the camper not being level. I expected to get this within 7 to 10 days and I had it in two I would highly recommend E-trailer to anyone and if I ever need anything for the trailer again I will be getting it through E-trailer.


Had to move my trailer hitch for my camper from my 2 wheel drive F150 to my new 4 wheel drive Ram 2500. This part was needed to get my camping trailer to run level. Perfect part for the job


This is an update to my previous review of this product. After calling Reese Products (which is a Cequent Company) they explained that is item is from another Ceguent Company being sold under the Reese name. It is really a , "Ultra Frame" product, Made in China. etrailer is not misrepresenting the product as a Reese product, Cequent is now marketing a Chinese version under the Ultra Frame brand. I would assume it's cheaper for Cequent to source the product out of China instead of the USA where I'm use to seeing Reese products.
Reese products carry a one year (or longer ) warranty, I have no idea what the warranty of this Chinese version is. It does not fit as well in the receiver as my other Reese products (wobbles side to side). The fit and finish is not as nice, you can see welding marks grinding. And, considering all the " junk" and counterfit products that China is importing into the USA, I'm not surprised that Cequent, used another brand name to import this part


This also replaces my hitch that was stolen which also was a Reese. This has enough drop for my Ram which sits pretty high. I have to say something about Etrailer. I deleted all my other trailer supply stores because these people are top notch in quality, prices, and shipping. From now on I'll order all I need here and I'll be in the market for a roof kit next summer. Guess who gets that order?


I used this shank to pull a travel trailer with a weight distribution hitch that required a deep drop.


More in depth review is provided on my Reese RP66073 product. The drop shank fit my needs and allowed enough depth or room for me to let my tailgate down, when using a standard three way hitch would cause my tailgate to hit my jack handle on the trailer.


Exactly what I needed to get the coupler and ball mount within the proper height ranges. It took about 2 hours to switch the shanks and to set the weight distribution hitch back up. Great product and the price and fast shipping can't be beat.


This one fit my trailer exactly as needed. The one I purchased just prior didn't have enough drop, my fault for not measuring things right.

Works great.
Robert C - 10/09/2020


Very satisfied with product received and service provided. Trust worthy and reliable.

Worked great allowing me to lower the trailer leveling trailer and truck...
James - 05/16/2021

Show More Reviews

See what our Experts say about this Pro Series Accessories and Parts

  • Distance from Pin Hole Center to End of Bar on Reese Weight Distribution Shank RP63971
    I pulled one of the # RP63971 weight distribution shanks from our warehouse to measure, and the distance from the center of the pin hole to the rear edge of the shank is 4 inches. I am including a picture showing the measurements I took while I had the shank available.
    view full answer...
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  • Would the Reese Weight Distribution Shank Part # RP63971 Work for 5 inches of Drop
    You are correct, there will be a slight squat to your 2011 Dodge Durango suspension when the tongue weight of your 2011 Airstream Sport Bambi trailer is on the hitch. The Reese Weight Distribution shank part # RP63971 that you referenced should be perfect for you since you said you need a 5 inch drop and this will do 4-3/4 inches of drop with a trunnion system like yours. I attached a review video for this ball mount, and FAQ on weight distribution and an FAQ on determining the correct...
    view full answer...
  • Weight Distribution Shank Recommendation for a Pro Series System Where More Drop is Needed
    To determine exactly how much drop you would need out of a shank check out the FAQ article I attached that details exactly how this is determined. The current shank you have will give you at most a 2 inch drop. For an additional 4-1/2 inches of drop capability check out the Reese Weight Distribution Shank part # RP63971. This shank can do a total of 6-1/2 inches of drop and should work well for you. I attached a review video for this product for you to check out also.
    view full answer...
  • How Does Trailer Ball Attach to Weight Distribution Shank
    The trailer ball would bolt to the head of the weight distribution system you're using, and the weight distribution head would bolt to the shank, as shown in the photo I've provided. If you weren't needing weight distribution and were only wanting to get the trailer ball at the proper height to tow the trailer level, you'd be better off using a ball mount to achieve the proper height. The FAQ article I'll link for you shows exactly how to determine the ball mount rise or drop needed. If...
    view full answer...
    Image 1 for
  • Recommended Replacement Shank for Use with Reese Weight Distribution Hitch
    Reese and ProSeries are sister companies, both part of Cequent Performance Products, and the shank # RP63971 will work with either brand of weight distribution to provide a height drop range up to 6-1/2 inches with round-bar systems or 4-3/4-inches with trunnion bar systems. We carry only the Reese part # RP63971.
    view full answer...
  • Can Reese Drop Only Shank # RP63971 Be Used with Husky Round Bar Weight Distribution Hitch
    The holes on the Reese Drop Only Weight Distribution Shank, # RP63971, measure 3/4 inch in diameter and are 1-1/4 inches apart on center. Although the two have not been tested together, if the hole diameter and spacing matches what the Husky round bar weight distribution hitch requires then part # RP63971 should work fine for you. Unfortunately I was unable to obtain the hole spacing and hole diameter for the Husky shank 31518 that you currently have.
    view full answer...
  • Recommended Weight Distribution Drop Shank For 63970 Pro Series System
    For your Pro Series weight distribution system on your 2012 Dodge Ram 3500, I recommend the Pro Series WD Shank - 14" Long - 4-3/4" or 6-1/2" Drop - 1.5K TW # RP63971. This will account for the 2-3 inches of drop you mentioned whether using round bar or trunnion bars.
    view full answer...
  • More Drop for Pro Series Weight Distribution System on 2008 Yukon Denali
    In order to add drop to your Pro Series system, which currently gives you a maximum of 2" drop, you could add a new shank. The Pro Series # RP63971 is an option, and will offer you a total of 6-1/2" of drop. You can find the exact drop you need by parking both your Yukon and trailer on level ground; then measure from the ground to the top of your receiver and from the ground to the bottom of your coupler. However much the Yukon's hitch height is greater than the coupler is the amount of...
    view full answer...
    Image 1 for
  • Shank for Pro Series Weight Distribution Hitch to Tow Level
    I'm not quite sure what you mean by hitch bar; are you asking about the shank for your Pro Series weight distribution hitch and how high it should be? If you could specify I may be able to help you out.
    view full answer...
    Image 1 for
  • What Does Pro Series Weight Distribution Shank # RP63971 Weigh
    The Pro Series weight distribution shank part # RP63971 that you referenced weighs a total of 22 lbs.
    view full answer...
  • Will The Reese Pro Series WD Shank Work With A Reese WDS?
    Yes, the Pro Series Weight Distribution Shank # RP63971 will work great with your Reese WDS 54947! This weight distribution shank will work with 2" trailer hitch receivers, has a maximum tongue weight capacity of 1,500lbs, measures 14" long, and features 4-3/4" to 6-1/2" of drop depending on if you're using a trunnion setup or a round bar setup. Attached is a product overview video of # RP63971 for you to check out as well.
    view full answer...
  • Shank with More Drop to Tow Trailer Level with Reese Weight Distribution System 49570
    For Reese weight distribution system # 49570 you can use shank # RP63971. It has 3-1/2 inches more drop than what is offered in the shank that came with the system. I have included a link to all of the weight distribution shanks for 2 inch trailer hitch receivers. Most of them are compatible with the Pro Series system and some are not. If you are not certain let me know and I will be happy to tell you if one is compatible.
    view full answer...
  • Weight Distribution Shank with More Drop for Pro Series System # PS49901
    Reese weight distribution shank # RP63971 has a maximum drop of 6-1/2 inches so if that is enough drop you can use it. If you need more shank # RP3344 has a maximum drop of 8-5/8 inches. The height adjustments are in 1-1/4 inch increments. I have included a link to our ball mount FAQ article that you can use to determine the drop you need.
    view full answer...
  • Excessive Trailer Sway Towing 32-Foot Travel Trailer with 6-Inch-Lifted Ram 2500 with 37-Inch Tires
    My technical contact at Reese confirmed that using a properly-rated and -installed weight distribution/sway control system such as the Reese Dual Cam should provide some reduction in trailer sway. You are correct that the sway you are experiencing when towing with your lifted Ram 2500 with 37-inch tires could be a result of the altered geometry in the tow vehicle, in particular the higher center of gravity. If your current weight distribution set-up has your trailer out of level when hitched...
    view full answer...
  • Need Longer Shank for Blue Ox SwayPro Weight Distribution System
    If your Blue Ox SwayPro weight distribution shank is not long enough for your application you can use a replacement shank from Blue Ox or another manufacturer such as Reese. Please note that the shank supplied with SwayPro has a height adjustment range of 13-inches (a drop of 1-1/2-inches up through a rise of 11-1/2-inches) along with a shank length of 10-inches. Reese Weight Distribution Shank # RP3215 offers a length of 11-inches and a height adjustment range from 5-3/4-inches of drop...
    view full answer...
  • Will a Pro Series Weight Distribution Shank # RP63971 Replace a RP54970
    Yes, the Pro Series Weight Distribution Shank part # RP63971 will fit your Pro Series system. Almost all of the weight distribution systems make their shanks to fit the standard size of holes that are 1-1/4 inch apart on center and are 3/4 inch in diameter. We have found that Curt shanks will also fit Reese and Pro Series as well for example.
    view full answer...
  • Reese Weight Distribution Shank with 2 and 3-1/4 Inch Drop for Trunnion Bar System
    I checked with Reese and the drop should be 2 inches from the top of the receiver opening to the top of the ball platform on the weight distribution head. Going with shank # RP63971 will be the better option.
    view full answer...
  • Will Reese Weight Distribution Shank # RP63971 Provide 6-Inches of Drop to Keep Trailer Level
    You certainly can change the shank for your weight distribution system if the hitch on your new truck is taller than your old one. If you need 6-inches of drop in order to keep your hitched trailer level then the Reese # RP63971 is a great choice. This shank shares the same 1500-lb tongue weight (TW) capacity as your current shank and it will work fine with your Reese WD system. It is fine for your hitch ball to be up to 1-inch higher than the coupler on the level trailer, before they...
    view full answer...
  • Weight Distribution Shank with 6 Inch Drop for a Reese Trunnion Bar Weight Distribution System
    Reese weight distribution shank # RP63971 is compatible with your Reese trunnion bar system and offers a maximum 4-3/4 inches of drop. When a weight distribution system is set up properly you should see hardly any squat in the suspension because that is what the system was designed to prevent. Shank # RP3215 might be a better fit because it offers a drop of 5-3/4 inches on a trunnion bar system. I have linked a video review of this shank for you.
    view full answer...
  • Availability of Replacement Weight Distribution Shank in Different Size
    Weight distribution systems like the Reese Strait-Line # RP66084 can be fitted with a new shank portion, such as the # RP63971, when a different amount of height rise or drop is needed for the hitched trailer to remain level with the ground - which is essential for good handling. It is also possible to use a different size shank to enable a weight distribution system used in a 2-inch hitch to be moved over to a vehicle that has a 2-1/2-inch hitch. In this case only the shank portion needs...
    view full answer...
  • Weight Distribution Shank with More Drop to Tow Trailer Level for Reese System
    The shank that you have now should have a maximum drop of 2 inches when used with a trunnion bar system or 1-1/4 inches when used with a round bar system. To get 2 more inches or more you can use # RP3215. It has a max drop of 5-3/4 inches with trunnion bars and 6-3/4 inches with round bars. It is adjustable up and down in 1-1/4 inch increments.
    view full answer...
  • Can Weight Distribution Shank be Used Upside-Down to Keep Trailer Level When Hitched
    As long as your particular weight distribution shank is not specified as being for Rise-Only or Drop-Only use then it can be used in an inverted position to give you the height adjustment you need to keep your trailer level. For example, Reese Weight Dist Shank # RP63971 must be used in the drop position only while # RP54970 can be used in either the rise or drop position.
    view full answer...
  • Drop Shank Recommendation for the Reese Weight Distribution System part # RP67509
    Since you need a weight distribution shank that will give you more drop than what came with your Reese Weight Distribution System part # RP67509 I would recommend the Reese Weight Dist Shank # RP63971. This shank can do up to 6-1/2 inches of drop and should work very well for you. I attached a review video for you to check out for this shank.
    view full answer...
  • Weight Distribution Shank with a 10 Inch or Greater Rise
    If your current weight distributing shank has an 8 inch rise and is currently 28 inches from the ground, then the # RP3215 would give you a 10-1/4 inch rise if you're using a round bar system or a 11-1/2 inch rise if you're using a trunnion system. Whether you're using a round bar or a trunnion system, either way you'd have at least the extra two inches of rise you're looking for. I'm curious about what kind of trailer you're pulling that the coupler height needs to be 30 inches above...
    view full answer...

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