What is a Weight Distribution Hitch?

A weight distribution hitch (aka "WD hitch") is a type of trailer hitch designed to evenly distribute the tongue weight of a trailer between the tow vehicle and the trailer itself. This is particularly useful when towing heavy loads like RVs, which can otherwise cause the tow vehicle to become unbalanced.

The weight distribution hitch works by altering the transfer point of the trailer's load onto the vehicle. Instead of concentrating the tongue weight solely at the connection point, the hitch disperses it across the axles of both the trailer and the vehicle. This is achieved through the use of spring bars, which are attached to the hitch on either side of the trailer's A-frame. These bars help to minimize the vertical pivoting at the hitch ball, ensuring that the tongue weight remains within a safe range of 10-15% of the overall load. This balance is crucial in preventing excessive swaying of the trailer, which could lead to loss of control, or excessive diving, which could cause the driver to lose control.

While weight distribution hitches generally range in price from $250 to $500, higher-end models can be more expensive. However, investing in a weight distribution hitch can enhance towing stability and protect both the trailer and the tow vehicle.

Contents

1. Do I need a weight distribution hitch?
2. How does a weight distribution hitch work?
3. Benefits of weight distribution
4. Parts of a weight distribution hitch
5. Types of weight distribution hitches
6. What to know before choosing a weight distribution hitch
7. How to install a weight distribution hitch
8. How sway control fits into weight distribution
9. Frequently asked questions about weight distribution

You typically need a weight distribution hitch if towing a trailer causes your vehicle to sag in the rear, lift at the front, or feel unstable — especially when the trailer’s weight approaches your tow vehicle or receiver hitch limits.

If you’re an avid traveler, adventure-seeker, lover of all things outdoors, or anything along those lines, chances are you may be looking into getting your hands on a travel trailer, or upgrading to a larger one to accommodate some of your newly-scheduled road trips that await. Whether your plans involve a state-to-state weeklong trek, spending a few days at some famous national parks, or simply weekending with your rig to wherever the road leads you, one of the most important things you need to know is how to safely haul your trailer to get to each destination safely, and weight distribution hitches are the answer.

Weight distribution hitches, aka WD hitches, are your key to ensuring safe trips on the road with their ability to provide more level towing and increased control. Sounds great, right? Let’s take a deeper dive into how WD hitches can completely change your towing experiences and enhance them for the better.

A weight distribution hitch evenly spreads trailer tongue weight across all axles, restoring balance to the tow vehicle and trailer to improve steering, braking, and overall towing control.

What exactly is a weight distribution trailer hitch? It’s pretty much exactly what it sounds like: a hitch that helps distribute weight better and more evenly.

In more technical terms, a weight distribution hitch (also called a load-equalizing hitch or load leveler hitch) distributes the tongue weight of a trailer across all four wheels of the tow vehicle. Any time a trailer is hooked up to your vehicle, it puts a certain amount of weight on the rear axle, which is called the tongue weight. The job of a weight distribution hitch is to even out that weight over the entire vehicle so that both the trailer and vehicle ride more levelly. This gives you more control on the road and makes the job of towing easier on your vehicle.

The diagram below displays how a weight distribution hitch can help level a vehicle-trailer combo. It shows the effect of the trailer tongue weight at the coupling point without a weight-distributing hitch installed, as well as the effect corrected with a hitch installed. This is a representation only, but it does help provide a visual of the weight-distributing concept.

After learning about how a WD hitch is basically a towing superhero, your next question may be, “how does it work?” Weight distribution trailer hitches work by distributing the tongue weight evenly to the trailer and tow vehicle axles, allowing both to be more parallel with the road. It accomplishes this using spring bars.

Like a standard ball mount, a WD hitch couples to the trailer using a trailer ball. However, unlike a ball mount, the WD hitch has spring bars that also bridge the vehicle-trailer connection, with one end attached to the trailer frame and the other near the receiver on the vehicle. The spring bars are placed under tension, leveraging down on the trailer frame and therefore lifting up on the back of the vehicle. This tension serves as an opposing force to the downward pressure of the trailer tongue weight, and ultimately keeps the vehicle and trailer level.

Weight distribution improves towing safety by leveling the vehicle and trailer, enhancing steering response, increasing braking effectiveness, reducing sway risk, and minimizing stress on critical vehicle components.

The question becomes, do I need a weight distribution hitch? Without the use of a WD hitch, the rear axle of your vehicle can suffer from the trailer tongue weight forcing down on it, leading to dangerous hazards, including upward lift on the front axle of the tow vehicle, reduced vehicle and trailer control, insufficient braking power, and overall increased stress and wear on critical vehicle components.

With the even weight distribution provided by WD hitches, you can look forward to a more level, controlled ride that gives you confidence and peace of mind, even in those split-second situations where you need to turn or brake quickly.

By restoring load to the front axle, a weight distribution hitch improves tire traction, stabilizes braking performance, and delivers more predictable steering — especially during emergency maneuvers.

A well‑set weight distribution hitch does more than level your rig — it restores control. Without weight distribution, tongue weight can push down on the rear axle, making the front end feel light. That can lead to vague steering and longer stopping distances.

With a WD hitch, front‑axle traction improves. Spring bars transfer some load forward, helping your front tires grip the road the way the vehicle was engineered to. Braking performance stabilizes. Balanced axles help ABS and brake bias work as intended, especially during emergency stops. Also, highway confidence increases. A level vehicle-trailer combo tracks straighter and responds more predictably in lane changes, merges, and crosswinds.

If your steering feels “floaty,” your stopping distances creep up, or the rear squats visibly when you hitch up, weight distribution can be the difference between white‑knuckle towing and confident control.

A weight distribution hitch consists of a shank, head, spring bars, and hookup brackets that work together to distribute trailer tongue weight evenly across the axles.

Now that you know what a WD hitch is and how it works, let's talk about each of the individual parts and what their function is. After all, with all that a WD hitch can do, there has to be some kind of genius engineering behind it, right?

1. Shank: provides an adjustable mount that can be moved up or down to accommodate the height of your tow vehicle
2. Head: connects the shank and spring bars
3. Spring bars: help level the trailer and tow vehicle by evenly distributing weight
4. Hookup brackets: allow for secure mounting of the spring bars on the trailer frame

There are a handful of different types of weight distribution hitches, each having to do with their unique design features: round bar, trunnion bar, without sway control, with sway control, hitch-mounted, and trailer-mounted.

The round bar WD hitch is named for the shape of its spring bars. The spring bars are round in shape and protrude from bottom of the hitch head, angling back to attach to the trailer frame. Because the bars stick out from bottom of the head, round bar hitches generally have slightly less ground clearance compared to trunnion bar.

Trunnion bar WD hitches have spring bars that are square shaped. They attach to the face of the hitch head, protruding outward and running parallel with the trailer frame. Trunnion bar WD hitches generally have slightly higher weight capacity options compared to round bar and provide a small amount of additional ground clearance.

There isn’t a significant difference between round bar and trunnion bar in terms of performance; the biggest differences are the obvious shapes and the way that the spring bars attach to the hitch head. So, essentially, it really comes down to a matter of preference for whether you choose round bar or trunnion bar — but either option will give you more comfort and control while towing.

Weight distribution hitches without sway control focus solely on leveling the tow vehicle and trailer by redistributing tongue weight across axles, without actively resisting side‑to‑side trailer movement. These systems use spring bars to counteract trailer tongue weight and restore proper load to the front axle of the tow vehicle. While effective at improving balance and braking, a WD hitch without sway control does not address lateral trailer motion, which may become noticeable at highway speeds or in windy conditions.

Weight distribution hitches with sway control combine load leveling with built‑in mechanisms that resist trailer sway, improving stability in crosswinds, passing traffic, and emergency maneuvers. These hitches manage sway through friction‑based resistance, fixed support bracket, or integrated spring‑and‑cam systems.

Many weight distribution hitches can be supplemented with a sway control attachment (a.k.a. sway bar). Integrated sway control systems eliminate the need for separate add‑on sway control units. An example is the CURT TruTrack™ system, which is available in two‑point (passive) and four‑point (active) integrated sway control options.

The hitch‑mounted weight distribution hitch or "receiver-mounted" is the traditional style of WD hitch. These types of hitches attach entirely at the tow vehicle’s receiver, requiring spring bars to be connected and adjusted each time the trailer is hitched or unhitched. This traditional weight distribution layout is effective; however, setup typically involves more steps during coupling and uncoupling compared to newer trailer‑mounted designs.

Trailer‑mounted weight distribution hitches place the hitch head and spring bar assembly on the trailer tongue, simplifying hookup while still delivering full weight distribution and typically some sway control options. With this design

• Spring bars remain attached to the trailer
• Hitching and unhitching requires fewer adjustments
• Lifting effort during hookup is reduced

Trailer‑mounted systems like CURT TruTrack™ trailer‑mounted hitches offer integrated sway control and are ideal for RV owners who hitch and unhitch frequently; want faster, more consistent setup; and prefer reduced physical effort during coupling.

Despite the different mounting method, trailer‑mounted systems provide the same fundamental benefits of leveling, control, and stability as traditional WD hitches.

Choosing the right weight distribution hitch depends on your loaded trailer weight, actual tongue weight, receiver hitch ratings, and tow vehicle characteristics — not just the trailer’s dry weight.

Selecting the right weight distribution hitch isn’t one‑size‑fits‑all. Your trailer, tow vehicle, and receiver hitch each play a role in how the system performs. Before you buy, consider the factors below to ensure the hitch you choose is both compatible and effective for your setup.

Key considerations:

• Loaded trailer weight (GVW), not dry weight
  Factor in gear, propane tanks, batteries, food, and water. Your “camp-ready” weight can be significantly higher than the dry number on the spec sheet.
• Actual tongue weight
  Aim for 10–15% of your total loaded trailer weight. This is the number that determines your spring bar rating—not the trailer’s empty weight.
• Receiver hitch ratings
  Many receivers list two ratings: one for deadweight towing or the "weight carrying capacity" and one for use with a weight distribution hitch. Always match your hitch to the receiver’s WD rating and never exceed the lowest-rated component in your chain.
• Tow vehicle suspension and stance
  If the rear sags and the front lifts, steering and braking suffer. A properly set WD hitch helps restore front-axle load and levels the rig.

If you tow only a few times a year, a weight distribution hitch can still be a worthwhile investment — especially if:

• Your trailer weight approaches your vehicle’s rated limits
• You travel highways, mountain grades, or windy corridors
• You want to reduce long‑term wear on suspension and tires

For short trips with lighter utility trailers, a WD hitch may not be necessary. But if your vehicle squats, the steering feels light, or sway increases at speed, adding weight distribution delivers immediate, noticeable improvements in control, comfort, and safety.

Installing a weight distribution hitch involves measuring ride height, adjusting the hitch head, tensioning spring bars, and re-measuring to ensure the tow vehicle and trailer are properly leveled.

Some of the basic steps include:

1. Measuring your vehicle and trailer height
2. Installing the shank into your hitch receiver
3. Setting up and adjusting the hitch head
4. Mounting the spring bars
5. Hooking up your trailer to your vehicle
6. Re-measuring your towing setup

When you’re installing your weight distribution hitch, remember to go slowly through each step, and don’t be afraid to go back a few steps in order to correct a mistake. A weight-distributing hitch is very adjustable, so no need to worry if you’re a newbie and this is your first WD hitch rodeo.

Also, it's very important to follow the exact steps and recommendations for installation provided by the hitch manufacturer. The steps listed here are just a general overview. For more info, check out our complete step-by-step walkthrough on how to install a WD hitch.

Weight-distributing hitches are perfect for towing slightly heavier loads such as RVs and larger trailers, and while they’re not as capable as 5th wheel hitches or gooseneck hitches in terms of weight capacity, they do offer some helpful sway control options.

Most WD hitches are compatible with a sway control unit, featuring ready-to-mount tabs; and others integrate the sway control functionality into the hitch itself – the CURT TruTrack™, for example. The TruTrack is a sway and weight distribution hitch all in one, giving you the best of both worlds for simplistic towing. 

Alright, now that you’ve loaded up your brain with all of this handy dandy weight distribution hitch information, it’s time to put it to use! You can be sure that the next time you get ready to hit the road with your rig that your ride will be leveled, smooth and safe when you have a WD hitch installed and part of your arsenal. Ready to take that next step and get the search process started for the WD hitch that’s perfect for you? Check out the Lippert store to get started and find exactly what you need!

These two systems are related but not interchangeable.

• A weight distribution hitch primarily levels the tow vehicle and trailer by spreading tongue weight across the axles. The result is better steering, braking, and control.
• Sway control reduces side‑to‑side trailer movement caused by wind, passing trucks, road crown, or sudden maneuvers. Some WD hitches include integrated sway control; others allow a separate sway control unit to be added.

Think of weight distribution as your foundation for safe towing. Sway control enhances stability, but it can’t fix an improperly loaded trailer or incorrect tongue weight. Set tongue weight first, then add sway control as needed for your route, weather, and trailer length.