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

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

Part Number: RP63971
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$191.38
Retail:$295.96
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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 etrailer.com. 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 (68)
  • Q & A (0)
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Pro Series Accessories and Parts - RP63971

  • Weight Distribution Hitch
  • Shanks
  • Fits 2 Inch Hitch
  • Pro Series
  • Round - 6 Inch Drop
  • Trunnion - 4 Inch Drop
  • 1400 lbs TW

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.


Features:

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


Specs:

  • 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:

Ratings & Reviews

4.9

68 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.

by:

This is one stout piece......



by:

SAME BRAND AS MY BALL HITCH



by:

Exactly what I needed to get the extra drop down.



by:

Very good item. Very pleased with the item and the very timely delievery.



by:

Exactly what i needed. Heavy, well made and nice finish. I installed a 2" lift in rear in my truck and 35" tires so the old shank was just to high off the ground. With this shank my camper sits level.



by:

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.



by:

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.



by:

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.



by:

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.



by:

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.



by:

I called to get imformation about a weight distribution hitch. William B had all the knowledge I needed and helped me through the hitch with part numbers and measurements and we compared pictures on email and he found exactly what I wanted and ordered direct from him. Very knowledgeable and helpful. Very friendly. I will do business there again



by:

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.

Charles S. profile picture

Charles S.

6/4/2016

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.



by:

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

Peter F. profile picture

Peter F.

2/4/2015

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



by:

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!

Brad profile picture

Brad

6/25/2017

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.



by:

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

Josh R. profile picture

Josh R.

8/3/2018

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.



by:

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.



by:

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



by:

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.

Robert C. profile picture

Robert C.

10/9/2020

Works great.



by:

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



by:

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.



by:

Found what I was looking for. Fast free shipping

Ernest profile picture

Ernest

7/27/2023

Very Good worked out well



by:

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.



by:

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?



by:

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



by:

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


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Show More Reviews

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

  • 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.
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  • Recommended Weight Distribution System for 3 Axle Boat Trailer On 2018 Ford F150 3.5 EcoBoost
    For your 1400 lb tongue weight on your 3 axle Venture boat trailer, I recommend the Reese Strait-Line Weight Distribution w Sway Control - Trunnion Bar - 17,000 lbs GTW, 1,700 lbs TW # RP66075. This weight distribution hitch will require a separate 2-1/2 inch shank like the Reese Titan Weight Dist Shank # RP54976 or # RP54977 for a deeper drop. Your truck is rated for up to 13,200 lbs towing according to Ford, so it can handle this towing capacity. If you truck has a 2 inch trailer...
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  • Weight Distribution Shank to Allow Additional Drop with Reese Weight Distribution System
    Sounds like you are in need of a weight distribution shank that will provide you with 4 inches of additional drop from what you have. A great solution for that is the Curt weight distribution shank part # C17123 which will give you the amount of drop you are looking for and also fits the head of your Reese system since Curt and Reese both make their shank dimensions to the same size.
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  • 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.
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  • 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...
    Image 1 for Image 2 for
  • Solution to Get Additional Drop from Pro Series Weight Distribution System
    I have a solution for you but you can't rotate the trunnion bars so that they change the height of your setup. For a shank that has more drop we have the # C17124 which can do a drop of up to 9 inches.
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  • 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.
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  • Weight Distribution Shank to Use in Reducer Sleeve for 2011 Ford F-250 with 2-1/2 Inch Hitch
    So the shank that you are using now, # RP63971, can only be used in the drop position which is why you need a new one. If it could be used in the rise position too it would not be a problem. So we need to look at shanks that can be sued in both the rise and drop position. Shank # RP54998 is 12-1/4 inches long. When used with a trunnion bar system it has a max rise of 8-5/8 inches and max drop of 2 inches. For round bar systems the max rise/drop is 7-3/8 and 2-3/4 respectively. Rise and...
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  • Weight Distribution Shank with 6 Inch Drop for a Pro Series System on a 2003 Toyota Tundra TRD
    I recommend using Reese shank # RP63971 which will give you up to a 6-1/2 inch drop when used with the round bars in the Pro Series weight distribution system # PS49583. A compatible shank that is exactly 6 inches is not available. Some manufacturers can use each others shanks but not all. The Reese shank will be the best option.
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  • Can Weight Distribution Shank be Used Like a Regular Ball Mount
    While there are plenty of adjustable ball mounts that have a similar style to a weight distribution (WD) shank, like the Pro Series # RP63971, there are no pieces that can be combined with a weight distribution shank to make it like a typical ball. The only way to accomplish this is to purchase a WD head unit and use it like a ball mount but that is still fairly costly and will be much heavier too. I've attached a link to our selection of adjustable ball mounts for you to filter through...
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  • Weight Distribution System with 5 Inch Drop Shank for a Trailer with 900 Pounds Tongue Weight
    For a total tongue weight of 900 pounds you have some options for weight distribution. We need to look at models that do not come with a shank so you can add one with the appropriate drop or close to it. Trunnion bar Reese system, # RP66022, is rated for 600 to 1200 pounds tongue weight and does not come with a shank or ball. For a shank that has 4-3/4 inches of drop when used with trunnion bars go with # RP63971. That 1/4 inch of difference will be taken up by the tongue weight pushing...
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  • 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.
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  • Shank Recommendation with 2 More Inches of Drop Than RP54970
    For a weight distribution shank that has 2 more inches of drop than the part # RP54970 you'd want the part # RP63971.
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    Image 1 for
  • Weight Distribution Shank Needed with 6-1/2 Inch Drop
    Rise and drop is measured from the top of the receiver opening to the top of the ball platform. If you flip your shank so that it points down you should be able to get a little more drop out of a system when the head is bolted on in the lowest position. If that is not enough then there are other shanks available with more drop. If you have a Pro Series system with round bars you can use shank # RP63971 which has a maximum drop of 6-1/2 inches. For Trunnion style bars you can use shank...
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  • 6 Inch Drop Weight Distribution Shank Recommendation for a Pro Series WD System
    I attached a link to the right that details how to pick out the correct rise/drop ball mount for you to check out. First we need to determine exactly how much drop you need. It sounds like you need 6 inches of drop. Which for a shank for your Pro Series Weight Distribution system that can do 6 inches of drop you would want the Reese Weight Dist Shank # RP63971 that you referenced as it can do a max of 6-1/2 inches of drop with a round bar WD system. If you have a trunnion bar setup you...
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  • Replacement Weight Distribution Shank for 2-Inch and 2-1/2-Inch WD Systems
    The good news is that weight distribution shanks from different brands are all made with standardized hole diameter and spacing so it is possible, for example, to use a Reese shank with an Equal-i-zer head and vice-versa. We don't offer your specific brand but we do have many shanks available for both 2-inch and 2-1/2-inch hitches. For a 2-inch shank that will give you about 8-inches of drop you can use Reese shank # RP3344 (good to 1400-lbs tongue weight) or Curt # C17124 (good to 1500-lbs...
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  • Reese Sway Bar System on Jeep Cherokee with Higher 2 Inch Hitch Receiver
    So for your Reese weight distribution system, you will need a replacement shank like the Pro Series Weight Distribution Shank - 14" Long - 4-3/4" or 6-1/2" Drop # RP63971. The holes of the Weight Distribution systems are 1-1/4 inches apart, so most hitch heads are 2-1/2 inches from bolt center to bolt center. If you don't have the weight distribution system and instead have the friction sway bar # 83660, then the MaxxTow MT70067 or # MT70068 will work with bracket # RP26003.
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  • 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.
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  • Will The Reese Weight Distribution Shank Allow Low Enough Drop And Level Truck and Trailer
    The item you selected, Reese Weight Distribution Shank, part # RP63971 does have a lower drop than part # RP54970, but you will need to measure to determine which shank you will need for your towing setup. To do this, there are a few steps involved. First, you will need to measure from the ground to the top of the receiver on your trailer hitch. Then, while your trailer is not connected to the vehicle and is on level ground, measure from the ground to the bottom of the trailer coupler. Now...
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  • Will Weight Distribution Help Level a 2009 Ford F-150 Pulling a 10,000 Pound Dump Trailer
    A weight distribution system will certainly help level the load and keep the truck from sagging. As you probably know the suspension on an F-350 is quite a bit heavier than that of an F-150. A weight distribution system will allow the truck to pull itself back up to level. For a trailer that weighs 10,400 pounds, I would recommend the Reese High Performance Trunnion Weight Distribution system, part # RP66022. It has a maximum gross trailer weight capacity of 12,000 pounds which is enough...
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  • Weight Distribution Setup for Trailer With Pole Tongue and Heavier Tongue Weight
    We can only recommend Reese weight distribution systems for use with their pole tongue adapters, and based on the weight range of the # C17057 and the picture you sent in you'd want the higher rated pole tongue adapter part # RP58393 which is rated for up 1,400 lbs tongue weight. Then for a weight distribution system you'd want the # RP66131 which has a tongue weight range of 800 to 1,500 lbs. For a hitch ball you'd want the part # C40030 and for a shank part # RP63971 and you'd be set. Curt...
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  • Is the Reese RP69FR Welded Together or Forged?
    The Reese # RP69FR is a welded together part. If you prefer a forged style shank, I suggest the Pro Series # RP63971. This will be rated a little higher at 1,500 pounds, but I do need to say that it cannot be used in the rise position. That being said, it does have 4 3/4 inches of drop, so it nearly matches the # RP69FR.
    view full answer...
  • Can Weight Distribution Shank Be Changed for Longer One
    If your truck and hitched camper are level after you have installed your Husky Center Line Weight Distribution hitch # HT32218 then it sounds like you did the install correctly. If you need more clearance between the trailer coupler and the truck you can switch out the weight distribution shank to a longer one such as the Pro Series # RP63971 which is 14-inches long. The shanks for these systems can be interchanged since they are all standardized. All shanks that we offer appear on the...
    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...
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