Weight Distribution Hitches
Weight Distribution Hitch vs a Regular Ball Mount
Same receiver, two completely different load paths - and your receiver's own label tells you which one you are allowed to use.
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Short answer
A regular ball mount puts the whole tongue weight on the tow vehicle's rear axle. A weight distribution hitch levers part of that load forward to the front axle and back to the trailer's axles. You need the second when your measured tongue weight exceeds the receiver's weight-carrying rating.
These are not two grades of the same part. They are two different load paths through the same receiver tube, and your receiver is rated separately for each. That is the whole answer, and almost nobody looks at the label.
What a regular ball mount does
A plain ball mount is a lever. The ball sits behind the rear axle, so every pound of tongue weight presses down behind the axle and, through that lever, lifts the front of the vehicle. The rear springs compress, the nose rises, the front tires carry less load, and steering and braking both get vaguer. On a light trailer the effect is too small to notice. On a heavy one it is the main thing wrong with the rig.
What a weight distribution hitch does differently
Spring bars run from the hitch head back to brackets on the trailer's A-frame and are tensioned. That tension applies a counter-torque at the head, which pushes load off the rear axle and shares it between the front axle and the trailer's own axles. The rig sits level, the front tires carry their design load, and the vehicle steers like a vehicle again.
| Consideration | Regular ball mount | Weight distribution hitch |
|---|---|---|
| Where tongue weight goes | Entirely onto the rear axle, behind it | Shared between front axle, rear axle and trailer axles |
| Receiver rating that applies | Weight-carrying | Weight-distributing, which is higher |
| Effect on vehicle attitude | Rear squats, nose rises | Rig sits close to level |
| Sway behavior | No resistance of its own | Integrated systems add friction or cam resistance |
| Hitching time | Drop the mount in and pin it | Plus seating and tensioning the bars |
| Typical weight to lift | A mount you can carry one-handed | An assembly of roughly 100 lb |
Receiver labels carry both ratings; the weight-distributing figure applies only when such a hitch is actually fitted.
How to tell which one you need
Three readings, about twenty minutes
Read the receiver label
Find the weight-carrying and weight-distributing figures stamped or stickered on the receiver crossmember. Write both down.
Measure loaded tongue weight
Loaded the way you tow, including propane, batteries and water. Not the brochure's dry figure.
Compare, then check the fender
Over the weight-carrying rating means you need distribution. Under it, hitch up with a plain mount and measure the front wheel arch before and after - a rise of more than roughly an inch is a distribution case on its own.
The full version of that test, including what to do when the two readings disagree, is in the three-check guide. The measuring methods are set out separately because the measurement is the part people get wrong.
What to look for, whichever way it goes
- If a plain mount is enough: get the drop right so the trailer tows level, match the ball to the stamp on your coupler, and add an anti-rattle pin. A nose-high trailer loses tongue weight, and lost tongue weight is where sway starts.
- If you need distribution: size the bars to your measured tongue weight, not to the trailer's gross weight, and prefer integrated sway control over a bolt-on friction bar.
- Either way: confirm payload on the door-jamb sticker. Tongue weight counts against payload no matter which hitch carries it.
Quick picks
Tap any row to jump to the full write-up. How these are chosen - and what we do and do not claim to know - is published in full on our research methodology page.
| # | Product | Best for | Our read | Price |
|---|---|---|---|---|
| 1 |  CURT Adjustable Channel Mount with Dual Ball (2 in shank, 6 in drop) If a regular mount is enough | Garages with several trailers | Two ball sizes, 6 in drop, 14,000 lb gross | Check price on Amazon #ad Affiliate link - we publish no price; Amazon shows the current one |
| 2 |  Fastway e2 Weight Distribution Hitch with Built-in Sway Control If you need distribution | A first weight distribution hitch | Load transfer plus always-on friction sway control | Check price on Amazon #ad Affiliate link - we publish no price; Amazon shows the current one |
| 3 |  Sherline Trailer Tongue Weight Scale What settles the argument | Measuring tongue weight at home | Measures the number the decision depends on | Check price on Amazon #ad Affiliate link - we publish no price; Amazon shows the current one |
1. If a regular mount is enough
CURT Adjustable Channel Mount with Dual Ball (2 in shank, 6 in drop)
CURT · Best for garages with several trailers
One mount that covers two ball sizes and a range of heights, which is the answer when the garage contains a boat trailer, a utility trailer and a camper that all sit at different heights. Capacity drops to the lower-rated ball you are actually using.
Published specifications
What works
- Two ball sizes and a height range in a single mount
- Flipping it gives rise as well as drop
- Rated to 14,000 lb on the larger ball
What does not
- Heavy, and more joints means more places for rattle to start
- The pins and bolts need checking for torque, unlike a one-piece mount
Skip it if
Pointless if you own one trailer and tow it with one truck - a fixed mount at the right height is lighter, quieter and cheaper.
#ad Affiliate link - we publish no price; Amazon shows the current one
Raw specifications: CURT’s own page. We earn nothing on that link.
2. If you need distribution
Fastway e2 Weight Distribution Hitch with Built-in Sway Control
Fastway · Best for a first weight distribution hitch
Sway control by steel-on-steel friction between the bars and their brackets, with no separate friction bar and nothing to remove before backing up. Available in round and trunnion bar versions, which is the detail to get right: trunnion for ground clearance, round for a lower-profile head.
We have not sourced a full specification table for this model from the manufacturer’s own site at a stable address. Rather than repeat figures we cannot cite, the assessment above is limited to what the design and the maker’s published description genuinely establish.
What works
- Nothing to engage or disengage - friction is always working
- Sold in both round-bar and trunnion-bar versions for different A-frame heights
- Simple enough that a first-timer can set it up from the manual
What does not
- Friction surfaces must stay clean and un-greased, which is the opposite of most hitch maintenance habits
- Noisy in tight, slow turns
Skip it if
Avoid it if you tow mostly on dirt or gravel - grit on the friction faces is exactly what the design does not want.
#ad Affiliate link - we publish no price; Amazon shows the current one
Raw specifications: Fastway’s own page. We earn nothing on that link.
3. What settles the argument
Sherline Trailer Tongue Weight Scale
Sherline · Best for measuring tongue weight at home
A dedicated scale you sit under the coupler to read tongue weight directly, with no arithmetic and no trip to a weighbridge. It is the one tool on this site that turns the single most important towing number from a guess into a measurement.
We have not sourced a full specification table for this model from the manufacturer’s own site at a stable address. Rather than repeat figures we cannot cite, the assessment above is limited to what the design and the maker’s published description genuinely establish.
What works
- Direct reading, with no bathroom-scale-and-lever arithmetic
- Repeatable, so you can see what moving the load actually does
- Mechanical gauge with no batteries to be flat when you need it
What does not
- Must be used on level ground with the coupler at towing height
- Single-purpose tool that spends most of its life in a cupboard
Skip it if
Unnecessary if your hitch already has a built-in gauge, or if you have a public scale nearby and are happy to use it.
#ad Affiliate link - we publish no price; Amazon shows the current one
Raw specifications: Sherline’s own page. We earn nothing on that link.
Cases where a regular mount is the only correct choice
- Fifth wheel and gooseneck setups. The load sits ahead of the rear axle, so there is no lever to counteract and weight distribution does not apply.
- Trailers whose maker prohibits it. Some pop-ups, boat trailers and surge-brake trailers specifically forbid spring bars. That instruction overrides everything here.
- Light trailers inside the carrying rating. A utility trailer behind a full-size truck does not need 100 lb of hardware to tow straight.
Key takeaways
- The two hitches use different load paths and different receiver ratings.
- Your receiver's label carries both numbers - read it before buying either.
- Measured loaded tongue weight decides it, not the trailer's advertised weight.
- Neither hitch changes tow rating or payload.
How we sourced this
Every figure on this page came from one of the following, each fetched while the page was written. Where a manufacturer or regulator does not publish a number, we say so rather than estimate it.
- 49 CFR 567.4 - certification label content, including Gross Vehicle Weight Rating and Gross Axle Weight Rating
- 49 CFR 571.110 (FMVSS 110) - vehicle placard, including the required "combined weight of occupants and cargo" statement
- CURT adjustable channel mount with dual ball - published specifications (part 45900)
- Fastway Trailer Products - manufacturer site
Common questions
- Can I tow with a regular hitch if the trailer is heavy but under my tow rating?
- Tow rating is not the limit that decides this. The receiver's weight-carrying rating and your payload are, and both are usually reached first. If measured tongue weight exceeds the weight-carrying figure, a plain mount is outside the receiver's rating no matter what the tow rating says.
- Is a weight distribution hitch worth fitting if the truck already sits level?
- Often not. If the truck stays level and your tongue weight is inside the carrying rating, you would be adding roughly 100 lb of hardware and a hitching step to solve a problem you do not have.
- Does a weight distribution hitch reduce sway by itself?
- Partly. Restoring tongue weight and front-axle load improves stability on its own, but the sway resistance people notice comes from an integrated friction or cam system. A distribution-only hitch does less for yaw than one with sway control built in.
More in Weight Distribution Hitches
A weight distribution hitch moves load off the back of your truck. Whether you need one is a number, not an opinion - and the number is on your door jamb.
Read next
Guide
Do I Need a WD Hitch?
The three-check test that answers the question definitively, plus the cases where the answer is a clear no.
Guide
How a WD Hitch Works
The mechanism in plain terms: where the load goes, why head angle matters, and why bar rating is the specification that counts.
Head to head
Weight Distribution vs Sway Control
The clearest distinction in towing, explained by symptom: squatting truck versus wandering trailer, and what to do when it is both.
Guide
Ball Mount vs Hitch Ball
What each part does, how their ratings interact, and the torque step that gets skipped when you buy them separately.
Found something out of date, or a figure you can source better than we did? Corrections get read first. How we research explains how these pages are put together, and contact is one click away.