Reese Weight Distribution w/out Shank - Trunnion Bar - 15,000 lbs GTW, 800 lbs TW

Reese Weight Distribution w/out Shank - Trunnion Bar - 15,000 lbs GTW, 800 lbs TW

Item # RP66021

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Weight Distribution

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Shipping Weight: 59 lbs

Arrives before Christmas with Ground or 3 Day Shipping.
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Weight Distribution RP66021 - Shank Not Included - Reese
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Weight Distribution RP66021 - Shank Not Included - Reese
Reese WD Only - RP66021
RP66021 - 500 lbs,600 lbs,700 lbs Reese WD Only
Reese Weight Distribution w/out Shank - Trunnion Bar - 15,000 lbs GTW, 800 lbs TW Heavy Duty RP66021
Weight Distribution RP66021 - Shank Not Included - Reese
Reese Weight Distribution w/out Shank - Trunnion Bar - 15,000 lbs GTW, 800 lbs TW Electric Brake Compatible RP66021
Reese Weight Distribution w/out Shank - Trunnion Bar - 15,000 lbs GTW, 800 lbs TW Electric Brake Compatible RP66021
Weight Distribution RP66021 - Heavy Duty - Reese
RP66021 - 500 lbs,600 lbs,700 lbs Reese WD Only
Reese Weight Distribution w/out Shank - Trunnion Bar - 15,000 lbs GTW, 800 lbs TW Electric Brake Compatible RP66021

Customer Photos

  • WD Only
  • 500 lbs
  • 600 lbs
  • 700 lbs
  • Reese
  • Fits 2 Inch Hitch
  • Shank Not Included
  • Electric Brake Compatible
  • Heavy Duty
High-performance system is designed to offer the best in weight distribution with an easy-to-adjust, forged head; a raised ball platform; and flexible, powder coated steel, trunnion spring bars. Adjustable shank and hitch ball sold separately. Lowest Prices for the best weight distribution from Reese. Reese Weight Distribution w/out Shank - Trunnion Bar - 15,000 lbs GTW, 800 lbs TW part number RP66021 can be ordered online at or call 800-298-8924 for expert service.

  • All Info
  • Reviews (2)
  • Q & A (38)
  • Photos
  • Why etrailer?

Reese Weight Distribution - RP66021

High-performance system is designed to offer the best in weight distribution with an easy-to-adjust, forged head; a raised ball platform; and flexible, powder coated steel, trunnion spring bars. Adjustable shank and hitch ball sold separately.


  • Evenly distributes weight over axles of tow vehicle and trailer for stability and control
    • Creates a more level ride for both tow vehicle and trailer
  • Trunnion spring bars are hot rolled and tapered for superior strength and flexibility
    • Bars flex appropriately over uneven terrain for a controlled, even ride
    • Curved ends are designed for use with dual-cam sway control (RP26002 - sold separately)
  • Adjustable spring-bar tension - just switch links in lift chains to fine-tune
  • Desired tilt is easily achieved with serrated-washer design - no more piling on washer after washer
  • Forged, raised ball platform on head eliminates need for raised hitch ball
  • System includes head assembly, lift brackets, trunnion spring bars, lift chains, and all necessary hardware
    • Adjustable shank and trailer hitch ball sold separately
      • Ball requires threaded shank with 1-1/4" diameter


  • Tongue weight: 400 lbs - 800 lbs
  • Gross towing weight: 15,000 lbs
  • Fits: 2" x 2" trailer hitch receivers rated for use with weight-distribution systems
  • Lift-bracket positioning: mount about 30" back from hitch ball
    • Requires approximately 5-1/2" of space along trailer frame
      • Optional mounts (sold separately) that take up less space on a trailer frame are available
    • Will not fit trailer frames wider than 2-1/2"
  • Limited lifetime warranty

Included w/ RP66021Required - Sold SeparatelyOptional Add-Ons
  • System Head
  • Lift Brackets
  • Spring Bars
  • Adjustable Shank
  • Hitch Ball w/ 1-1/4" Diameter Shank
  • Bar-Style Friction Sway Control
  • Dual-Cam Sway Control

Weight Distributing Hitch

Create a stable ride for your tow vehicle and trailer with a weight-distribution hitch. Adding spring bars to your towing system applies leverage, which transfers the load that is pushing down on the rear of your vehicle to all the axles on both your tow vehicle and your trailer, resulting in an even distribution of weight throughout. The result is a smooth, level ride, as well as the ability to tow the maximum capacity of your hitch.

Selecting a Weight-Distribution System

The tongue weight rating is the most important factor in determining which size weight-distribution system you should use. If the bars of the system you choose are rated too high for your setup, they will create a rigid ride, which can result in a bouncing trailer. If, on the other hand, the bars are not rated high enough, the system will be unable to properly distribute the weight, rendering it virtually useless.

To determine the proper weight rating for a weight-distribution system, you must first determine your trailer's tongue weight. Then add to that the weight of the cargo behind the rear axle of your tow vehicle. These two measurements make up the tongue weight rating for a weight-distribution system.

Serrated Washer System

Unique Features of Reese Trunnion-Bar Weight Distribution

The easy-to-use, serrated washers on the Reese system make adjusting the tilt of the weight-distribution head a snap. This is a huge improvement over the standard pin-and-washer method, which involves piling washers - one on top of another - onto a difficult-to-access pin. The serrated-washer system lets you easily loosen, adjust and tighten a single washer and nut on either side of the head for simple, secure positioning.

The trunnion spring bars of this system slide into the weight-distribution head for quick, easy installation. With a tapered design and hot rolled steel construction, these bars offer superior flex, ensuring a smooth, controlled ride for both your tow vehicle and your trailer. In addition, these specially designed bars have rounded, hooked ends, making them the only kind of spring bars that can function with Reese's active-style, dual-cam sway control (sold separately).

66021 Reese Trunnion Bar Weight Distribution Hitch without Hitch Bar

RP66021 Installation InstructionsInstallation Details RP66021 Installation instructions

Customer Reviews

Reese Weight Distribution w/out Shank - Trunnion Bar - 15,000 lbs GTW, 800 lbs TW - RP66021

Average Customer Rating:  5.0 out of 5 stars   (2 Customer Reviews)

High-performance system is designed to offer the best in weight distribution with an easy-to-adjust, forged head; a raised ball platform; and flexible, powder coated steel, trunnion spring bars. Adjustable shank and hitch ball sold separately.

- RP66021


Reese equipment quality is top notch. The adjustment mechanism at the head is what convinced me to pick Reese over other manufacturers. Customer service from etrailer is exceptional and will keep me coming back in the future. 180988

- RP66021


After a slight modification to my trailer (brackets fit a 2.5 inch frame; mine was 3 inches), this hitch fit perfectly and works great. Now I can tow a 3 ton tractor without worrying about putting too much strain on my rear axle. Also impressed with's service - the hitch arrived much sooner than expected. Will definitely be doing business on this site again. 11498


Ask the Experts about this Reese Weight Distribution
Do you have a question about this Weight Distribution?

  • How to Install Sway Bars on Reese Weight Distribution
  • We have an excellent video that will walk you through the weight distribution and sway control installation. We also have an FAQ that has answers to the most common weight distribution and sway control questions. I have attached links to both the video and the FAQ below.
    view full answer...

  • Trailer hitch and Weight Distribution for a 2015 Jeep Grand Cherokee
  • The most popular hitch for the 2015 Jeep Grand Cherokee is Curt trailer hitch # C13182. It will fit all models including diesel models and the SRT-8 models. The hitch is rated for 5,000 pounds gross trailer weight, 500 pounds tongue weight. When used with weight distribution the hitch is rated for 7,500 pounds gross trailer weight and 750 pounds tongue weight. If you plan on doing some towing you might be interested in etrailer ball mount kit # 989900. It comes with 2 ball mounts; one...
    view full answer...

  • Cargo Trailer Pulls Up On Ball and Makes a Lot of Noise Over Bumps at highway Speed
  • It does sound like the tongue weight was not high enough. If a trailer is empty, you can experience some of these symptoms. The tongue weight of a trailer should be between 10 and 15 percent of the gross trailer weight. For example if your trailer was fully loaded and weight 7,000 pounds, the tongue weight should be between 700 and 1,050 pounds. Proper loading of the trailer will also help. Heavier items should be centered at the bottom and you would not want one side carrying more weight...
    view full answer...

  • Weight Distribution for a Trailer with Varying Tongue Weight from 400 to 1,500 Pounds
  • No worries, I can help you out with this issue. It is a common question, a varying load. There are weight distribution systems that have a tongue weight capacity range. The widest range is 600 to 1,200 pounds. There is also an 800 to 1,500 pound system. Considering that you can potentially have 1,500 pounds tongue weight you will need a system that goes at least that high. There is a Blue Ox system, # BXW1500, that is rated for up to 1,500 pounds tongue weight and requires a minimum...
    view full answer...

  • Weight Distribution System for 28 ft Travel Trailer and Stock Trailer Towed by 2010 F150 4x4
  • We typically calculate trailer tongue weight as 10 to 15 percent of the GTW. Anything stowed in the tow vehicle behind the rear axle needs to be added to the tongue weight figure. Given the 7700 gross trailer weight of the travel trailer you mentioned, your tongue weight can range between 770 and 1100 lbs. For this range of tongue weights, I would recommend the Reese Heavy-Duty Trunnion Bar System, part # RP66542. This system is effective on trailer tongue weights ranging from 600-1200...
    view full answer...

  • Is a Weight Distribution System Needed for a 2008 Chevrolet TrailBlazer Towing a Coachman Freedom
  • I did a bit of research and the 2008 Chevrolet TrailBlazer weighs in at somewhere around 4,500 lbs, depending on equipment. As a general rule anytime you are towing a trailer that weighs greater than 50 percent of the vehicles total weight, trailer brakes and weight distribution are recommended. You should check your TrailBlazer and hitch weight ratings to determine the actual towing capacity for your specific vehicle. The weight distribution system you referred to, # 66557, would not...
    view full answer...

  • Adjusting Weight Distribution System to Eliminate Vehicle Sag
  • Assuming that the weight of your camper does not exceed the capacity of the spring bars, a combination of tilting the weight distribution head rearward and tightening the chain hangers by one chain link at a time should distribute more tongue weight toward the front axle of the vehicle, thus lessening the sag at the rear bumper. If there are less than 5 links between the snap up bracket and u-bolt connecting the chains to the spring bar, adjust ballmount angle rearward. I have linked...
    view full answer...

  • Suggested Weight Distribution and Brake Controller for 1993 Suburban Towing Horse Trailer
  • The dry weight of the trailer, 2810 lbs, a 900 lb horse with the possibility of another plus gear would place your maximum loaded trailer weight somewhere in the neighborhood of 5000 pounds. When calculating the necessary capacity of a weight distribution system, the weight of any cargo loaded in the tow vehicle behind the rear axle needs to be considered as well. The 5000 pound figure also includes an estimated 400 lbs of gear both in the trailer and in the rear of the tow vehicle. Given...
    view full answer...

  • Weight Distribution System or Air Bags for a 2001 Chevy Tahoe Towing a Trailer
  • There are two separate sets of limits that we are dealing with here. The vehicle itself has a towing capacity of 7700 lbs. We typically figure the tongue weight capacity as being 10 percent of that figure, or 770 lbs. Your hitch however, has capacities of 5,000 lbs/ 600 lbs tongue weight, and 12,000 lbs / 1,500 TW with a weight distribution system. Therefore, with a weight distribution system, you can safely go up to that 770 lb tongue weight figure (but no higher.) Your towing system...
    view full answer...

  • Experiencing Awful Noise When Backing With Reese High Performance Weight Distribution System
  • Experiencing awful noise when backing with the Reese High Performance Trunnion System, item # RP66021, is not normal. First I would recommend greasing your hitch ball and trunnion ends. Second you should check the clearance of your spring bars. You should have 5 to 6 links between the snap up hook and the spring bar when hooked and ready to tow. To adjust this, if you need to, you will have to adjust the angle of the weight distribution head and hitch ball. If you have friction sway...
    view full answer...

  • Weight Distribution System for a Ford E-350 Towing a Trailer
  • The answer to your question will depend on several factors. What is the towing and tongue weight capacity of the trailer hitch that's mounted on your truck? What is your vehicle rated to tow? Does the rear of the truck squat dramatically when the truck is loaded and the trailer is attached? How much weight do you carry in the rear of the truck? Are you currently experiencing any drivability or handling problems (with the trailer attached)? The main function of a weight distribution system...
    view full answer...

  • Will a Reese Weight Distribution System Work on a V-Nose Car Hauler Trailer
  • If you already have the correct chain hanging brackets on your trailer then that is great news because that means that the system will fit without using any additional hangers or modifying anything. But you will need to choose a system based on the total tongue weight of the trailer. Total tongue weight is calculated by taking the tongue weight of the trailer when loaded and ready to tow and then adding to that the weight of any cargo loaded behind the rear axle of the tow vehicle. Reese...
    view full answer...

  • Reusing Old Weight Distribution or Use a New System for a 2015 Lance 2285 Travel Trailer
  • Since the original Curt system with the dual-cam sway control that you added provided good results I would stick with it because if it doesn't perform the way you want it to you could still try a different system. If it were me I would try the parts I already had to avoid any additional expense until necessary. But you mentioned that you have Curt system # C17052. I am not sure how you managed to use the Reese dual-cam sway control, # RP26002, because it requires spring bars with the...
    view full answer...

  • Weight Distribution with V-Nose Trailer Weighing 4500 lbs
  • Your vehicle sounds like a great candidate for the Timbren Suspension Enhancement System, part # TGMRCK15S. This product replaces the axle bump stops and will help eliminate the sag you are experiencing with the trailer attached. A weight distribution system would also be a good alternative. As things stand now, your hitch has a 5000 lb capacity. When fully loaded, your trailer will be fairly close to this capacity. If you have clear access to the sides of the trailer frame, you CAN...
    view full answer...

  • Compatability of Weight Distribution System for 2009 Toyota Tacoma Pulling a 2008 Bayside Trailer
  • You are on the right track. A weight distribution system will transfer the load to your vehicle and trailer axles and level out the load. The weight distribution system you will need will depend on the tongue weight of your trailer fully loaded and ready to travel. One of our best weight distribution systems is the Reese High Performance Trunnion System, item # RP66020. Which has a tongue weight ratings of 600 and 800 pounds respectively. When selecting a weight distribution system a...
    view full answer...

  • Weight Distribution System Recommendation for a 2007 Chevy Silverado 1500 Towing Trailer that Sags
  • Since you are towing a trailer you actually would want to use a weight distribution system instead of an air bag system. Air springs are designed for carrying heavy loads in the bed of your truck, when they are used while towing a trailer they actually act as a fulcrum point and unload the front axle of the vehicle which will cause handling and braking issues in an emergency situation. The best way to pick out a weight distribution system is to base it off of the loaded tongue weight...
    view full answer...

  • Weight Distribution Recommendation for a 1999 GMC Yukon SLT
  • To determine the towing capacities of the 1999 GMC Yukon and if they change with the use of weight distribution, you will need to look at the owners manual in the towing section. The hitch itself on the vehicle should have a sticker that lists the capacity. You are 100 percent correct, you will want to stay within the capabilities of the vehicle. If the hitch is rated lower, then you will go by its capacities. Always go by the lower rated component in any given system. I found a manual...
    view full answer...

  • Availability of Replacement Parts for Reese Weight Distribution System # RP66021
  • The pieces that came off your weight distribution/sway control system could be several things, depending on which end the pieces came from and if they came from a sway control component or a weight distribution component. Either way, you do not want to tow your trailer with a naked bar until the problem is fixed. If it came from the spring bar and it is the end that goes into the weight distribution head, it is probably the trunnion, like # 58098. This is the part that holds the spring...
    view full answer...

  • Determining Maximum Weight of Trailer That Can be Towed by 2005 Excursion 4x4 Diesel
  • To determine the maximum trailer weight that can be towed, you will need to subtract the GVW (gross vehicle weight) from the GCWR (gross combined weight rating). The GVW is the curb weight of the vehicle, plus the cargo. GCWR is the maximum allowable weight for the trailer plus the tow vehicle. Given the figures you provided, when the GVW is subtracted from the GCVW, 11,500 lbs is the result, and would represent the maximum amount the trailer plus its contents can weigh. This being...
    view full answer...

  • Compatibility of Weight Distribution System and Swivel Jack
  • A weight distribution system is not designed to accommodate the space needed for a swivel jack, since typically A-frame jacks are used on A-frame trailers. If the swivel jack and weight distribution system are not working together, you will want to move the swivel jack to provide the necessary room for the weight distribution system. Another option is to replace the swivel jack with an a-frame trailer jack. We offer several A-frame jacks with wheels already attached and many other a-frame...
    view full answer...

Do you have a question about this Weight Distribution?

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Info for this part was:

Expert Research:
Michael L
Written by:
Lindsey S
Expert Research:
Michael H
Expert Research:
Jameson C
Updated by:
Laura H
Installed by:
Cole B
Updated by:
Sarah W
Updated by:
Amanda M

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