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Buying guide · 10 min read · Updated October 2, 2026

6 Best Sway Control Hitch For Boat Trailer in 2026: A Practical RV Guide

Compare six sway control hitches and add-ons for boat trailers, with notes on surge brake fit, frame size, and tongue weight for ramp-launch owners.

Bowen HigginsBy Bowen HigginsRV Editor at RV Gear Lab6 products comparedSpec-sheet researched

At a glance

Our top picks

At a glance · 6 picks

  1. Fastway e2 2-Point Sway Control Round Bar Hitch
    Best OverallFastway e2 2-Point Sway Control Round Bar Hitch↓ See why we picked it
    Check price
  2. Fastway Connect™ Weight Distribution Hitch
    Best Chain Style PickFastway Connect™ Weight Distribution Hitch↓ See why we picked it
    Check price
  3. Sway control bracket
    Best Add-On KitSway control bracket↓ See why we picked it
    Check price
  4. Frtcaty Trailer Hitch Sway Control Adapter
    Best Budget AdapterFrtcaty Trailer Hitch Sway Control Adapter↓ See why we picked it
    Check price
  5. 48385 Anti-Sway Control Adapter
    Best Frame Mount Adapter48385 Anti-Sway Control Adapter↓ See why we picked it
    Check price
  6. CURT 40093 Replacement Trailer Sway Control Ball
    Best Replacement PartCURT 40093 Replacement Trailer Sway Control Ball↓ See why we picked it
    Check price

Boat trailers raise sway questions that camper owners rarely face, including surge brakes, wet frames, and a tongue weight that shifts when the boat is loaded. This guide sorts complete hitches from bolt-on kits so you know what each part really does.

The six picks run from a full Fastway system to small adapters and a replacement ball. Each one is ranked by how much of the job it handles on its own and how clearly its listing explains frame and brake fit.

RV Gear Lab field notes

The Rig Fit Check

Start with the job
Fastway e2 2-Point Sway Control Round Bar Hitch leads this shortlist for Boat owners wanting a complete hitch. Use that fit as a reference point, then compare the alternatives against your own space and workload.
Specs that separate the picks
The first details to compare are 8,000 lb trailer rating, 1,000 lb max tongue weight, Fits 3 to 6 inch frames. Confirm the exact model and included components before ordering.
Trade-off to plan for
Boat trailer frame fit not addressed

Before you buy

What Matters Before You Choose a Sway Control Hitch For Boat Trailer

Key buying criteria so you get the right fit the first time.

  1. 01

    Surge brake frame compatibility

    Many boat trailers use surge brakes, a hydraulic actuator at the coupler, and some frame-mounted sway brackets are not made for that setup. This matters because a bracket that cannot clamp onto your frame leaves you with a part you cannot install. Check the listing for words like hydraulic or surge, as the Eontab 48385 Adapter does, and ask the maker if the page is silent.

  2. 02

    Tongue weight on boat trailers

    Boat trailers often carry a lighter tongue than a camper, and a weight distribution hitch rated far above your real load rides stiff. The reason is that spring bars need real tongue weight to flex properly. Weigh or estimate your loaded tongue weight, then compare it with figures like the 800 lb rating on the Fastway e2 Hitch.

  3. 03

    Complete hitch or add-on

    A complete hitch such as the Fastway e2 Hitch gives weight distribution and sway control together, while an Equal-i-zer Sway Bracket only works on a hitch you already own. Buying an add-on for the wrong hitch is a common and costly mistake. Read the compatibility line and part number before adding anything to the cart.

  4. 04

    Frame width and shape

    Frame mounts are made for particular trailer tongues, such as a 2 inch by 3 inch A-frame or a 3 to 6 inch frame. A boat trailer with a tapered or round tongue may not accept them. Measure the tongue with a tape at the exact spot where the bracket would clamp, then compare it with the size printed in the listing.

  5. 05

    Corrosion and wet use

    Ramps and salt spray attack bare steel quickly, and a seized bolt can stop you from adjusting a sway kit. Powder coating or plating slows that, but it is not a promise of years of service. Look for a named finish on the product page, and rinse any hitch parts with fresh water after a launch.

  6. 06

    Weight limits you can verify

    A trailer weight and tongue weight figure only help if it appears in the title or description. Some parts here, like the Frtcaty Sway Adapter, state dimensions but not a load rating. Treat a missing rating as an open question and confirm it with the seller before towing a loaded boat.

Our standards

Why You Can Trust RV Gear Lab

At RV Gear Lab, we compare products based on rig fit and power or hookup compatibility, verified specifications, usability, setup requirements, weight, durability, and real-world trade-offs. We do not rank products purely on marketing claims or commission rates.

We have not personally tested every product listed. Where hands-on testing is not available, recommendations are based on verified manufacturer specifications, product documentation, use-case fit, and comparative research.

How we review RV gear →

Detailed reviews

The 6 best sway control hitch for boat trailer, explained

01

Best Overall · 1 of 6

Fastway e2 2-Point Sway Control Round Bar Hitch

Fastway e2 2-Point Sway Control Round Bar Hitch
  • 8,000 lb trailer rating
  • 800 lb tongue weight rating
  • 10 year limited warranty
Check price on Amazon for Fastway e2 2-Point Sway Control Round Bar Hitch (opens in a new tab)
Best for: Boat owners wanting a complete hitch

Our take

It suits a boat owner towing a mid-size boat who wants one hitch that stays attached while backing down a ramp.

Why it made the shortlist

The title lists an 8,000 lb trailer weight rating and an 800 lb tongue weight rating, and sway control is built into the hitch instead of added on.

Compared with the Fastway Connect below it, the e2 adds integrated sway control to the weight distribution, while the Connect relies on chains alone.

What works

  • Sway control built into the hitch
  • Stays attached when backing up
  • Trunnion and round bar models offered
  • Ten year limited warranty

Watch out for

  • Boat trailer frame fit not addressed
Check price on Amazon for Fastway e2 2-Point Sway Control Round Bar Hitch (opens in a new tab)
02

Best Chain Style Pick · 2 of 6

Fastway Connect™ Weight Distribution Hitch

Fastway Connect™ Weight Distribution Hitch
  • 1,000 lb max tongue weight
  • 10,000 lb max trailer weight
  • Chain link adjustment, no drilling
Check price on Amazon for Fastway Connect™ Weight Distribution Hitch (opens in a new tab)
Best for: Heavy tongue weights, simple setup

Our take

Choose it if your boat trailer carries a heavy tongue and the main complaint is a squatting tow vehicle.

Why it made the shortlist

The Fastway Connect is a chain-style weight distribution hitch that attaches to the trailer frame with hardened steel chains. It is rated for a 1,000 lb tongue weight and 10,000 lb trailer weight, and the listing says it fits RV, cargo, utility, horse, and ATV trailers without drilling the frame.

It sits below the Fastway e2 Hitch because the listing sells it as weight distribution and stability, not as a sway control system. In return it is the simpler and less expensive way to level a tow vehicle with a heavy tongue.

If sway is the actual problem, plan to pair it with a separate sway control kit.

What works

  • No frame drilling needed
  • Adjust by changing the chain link
  • Works on many trailer types

Watch out for

  • Listing does not promise sway control
  • Chain links need manual adjustment
Check price on Amazon for Fastway Connect™ Weight Distribution Hitch (opens in a new tab)
03

Best Add-On Kit · 3 of 6

Sway control bracket

Sway control bracket
  • Fits 3 to 6 inch frames
  • For 6,000 to 14,000 lb hitches
  • Complete bracket kit
Check price on Amazon for Sway control bracket (opens in a new tab)
Best for: Owners upgrading an existing hitch

Our take

Buy it if you already tow with a compatible Equal-i-zer hitch and need the brackets.

Why it made the shortlist

This is a complete sway bracket kit made for a 6,000 to 14,000 lb rated Equal-i-zer style hitch. The listing says it fits 3, 4, 5, and 6 inch trailer frames, which covers most boat trailer tongues.

Compared with the generic adapters below, it is a full kit rather than a single part.

It does nothing on its own, and the listing gives no note about surge brake frames, so measure your frame first.

What works

  • Covers four frame widths
  • Complete kit, not a single part
  • Rated range matches heavy boats
  • Far cheaper than a new hitch

Watch out for

  • Needs a compatible hitch already
  • Package is heavy at about 33 lb
The catch
It costs a fraction of the Fastway e2 Hitch but only works if you already own a matching hitch.
Check price on Amazon for Sway control bracket (opens in a new tab)
04

Best Budget Adapter · 4 of 6

Frtcaty Trailer Hitch Sway Control Adapter

Frtcaty Trailer Hitch Sway Control Adapter
  • Fits 2 inch square ball mounts
  • Class III and IV use
  • 1.02 inch main hole
Check price on Amazon for Frtcaty Trailer Hitch Sway Control Adapter (opens in a new tab)
Best for: Budget add-on for friction bars

Our take

Pick it if you already have a friction bar and need a ball side mount.

Why it made the shortlist

The Frtcaty adapter is a steel mount that slides under the hitch ball so a friction sway bar can attach to a 2 inch square ball mount. The listing names Class III and Class IV use and works with most friction sway control systems and mounting pads.

What works

  • No welding needed
  • Powder coated steel build
  • Installs in minutes
  • Works with most friction systems

Watch out for

  • Needs a separate sway bar
  • Hole sizes must match your ball
Check price on Amazon for Frtcaty Trailer Hitch Sway Control Adapter (opens in a new tab)
05

Best Frame Mount Adapter · 5 of 6

48385 Anti-Sway Control Adapter

48385 Anti-Sway Control Adapter
  • For 2 by 3 inch A-frames
  • Clip-on bolt design
  • Powder coated steel
Check price on Amazon for 48385 Anti-Sway Control Adapter (opens in a new tab)
Best for: Small boat trailers with plain frames

Our take

It is a sensible pick for a small boat trailer with a plain 2 by 3 inch frame.

Why it made the shortlist

The Eontab 48385 clips onto the trailer A-frame to connect an anti-sway bar, without welding. The listing says it is for 2 inch by 3 inch A-frame trailers and names marine trailers among the types it suits.

It handles the trailer side of the connection, which the Frtcaty Sway Adapter leaves alone.

What works

  • No welding required
  • Names marine trailers as compatible
  • Corrosion resistant coating
  • Clip-on design protects the frame

Watch out for

  • Not for hydraulic brake trailers
  • Only fits one frame size
Check price on Amazon for 48385 Anti-Sway Control Adapter (opens in a new tab)
06

Best Replacement Part · 6 of 6

CURT 40093 Replacement Trailer Sway Control Ball

CURT 40093 Replacement Trailer Sway Control Ball
  • 1-1/4 inch ball diameter
  • 5/8 x 1-3/4 inch shank
  • For CURT unit 17200
Check price on Amazon for CURT 40093 Replacement Trailer Sway Control Ball (opens in a new tab)
Best for: Owners of a CURT sway unit

Our take

Keep one as a spare if a CURT friction bar is already on your boat trailer rig.

Why it made the shortlist

The CURT 40093 is a 1-1/4 inch replacement ball for the CURT sway control unit 17200, with a 5/8 x 1-3/4 inch shank. It is chrome plated and comes with a zinc plated hex nut and lock washer.

It ranks last because it is a spare part, not a hitch.

Everyone else should look higher in this list.

What works

  • Chrome plated steel ball
  • Lock washer and nut included
  • Fits most weight distribution hitches
  • Very low cost

Watch out for

  • Sway control unit sold separately
  • Only useful with CURT 17200
Check price on Amazon for CURT 40093 Replacement Trailer Sway Control Ball (opens in a new tab)

Methodology

How We Built This Shortlist

Each pick was assessed across 5 criteria weighted for real-world use.

01

Boat trailer fit

We compared each listing for frame size notes, brake type warnings, and any mention of marine or utility trailers.

02

System scope

We separated complete hitches from bolt-on kits and single adapters so you can see what each one actually does.

03

Stated ratings

We looked only at the weight ratings printed in each title or description and flagged where none is given.

04

Install effort

We compared how each part attaches, noting no-weld and clamp-on designs versus parts that need matching brackets.

05

Corrosion resistance

We noted coatings and finishes, since boat trailers meet water and salt more than camper trailers do.

Decision guide

Match a Sway Control Hitch For Boat Trailer to Your RV

By Trailer and Hitch Situation

Your situationRecommended pickWhy
Mid-size boat, heavy tongue, no hitch yetFastway e2 HitchOne system covers weight distribution and sway
Heavy tongue, sway not an issueFastway Connect HitchChain style levelling without frame drilling
Already own a compatible hitchEqual-i-zer Sway BracketAdds frame brackets at a lower cost
Small trailer, plain 2 by 3 inch frameEontab 48385 AdapterClip-on mount, but no hydraulic brakes
Spare ball for a CURT sway unitCURT 40093 Sway BallDirect replacement part

By Budget

BudgetRecommended pick
$10 to $20CURT 40093 Sway Ball or Eontab 48385 Adapter
$20 to $90Frtcaty Sway Adapter or Equal-i-zer Sway Bracket
$190 to $370Fastway Connect Hitch or Fastway e2 Hitch

Complete Hitch vs Bolt-On Kit

Complete hitch

The Fastway e2 Hitch and Fastway Connect Hitch bring spring bars or chains plus a head, so the whole connection is solved in one purchase. You get a warranty and one set of ratings to check.

Bolt-on kit

The Equal-i-zer Sway Bracket, Frtcaty Sway Adapter, and Eontab 48385 Adapter only add a mounting point. They cost little but depend on a bar, hitch, or frame that you already have.

If you have no hitch yet, buy the Fastway e2 Hitch. Choose a bolt-on kit only when its listed hitch match is exact.

By Brake and Frame Type

Best matchRecommended pick
Boat has hydraulic or surge brakesFastway e2 Hitch
Frame is a plain 2 by 3 inch A-frameEontab 48385 Adapter
Want the smallest spend on an existing friction barFrtcaty Sway Adapter
Heavy trailer, wide frameEqual-i-zer Sway Bracket

For Ramp-Launched Boats Specifically

Look for

Look for a frame mount that states it works with your brake type, plus a coating that resists corrosion, as listed for the Eontab 48385 Adapter.

In this comparison

The Fastway e2 Hitch stays attached when backing up, which suits ramp work, while the Eontab 48385 Adapter excludes hydraulic brakes and the Equal-i-zer Sway Bracket lists 3 to 6 inch frames.

When to Spend More

Spend more if

Spend more if your trailer is heavy, you tow often, and you want one warranted system: the Fastway e2 Hitch with its 10 year limited warranty is the pick. The Equal-i-zer Sway Bracket also makes sense if you already own the matching hitch.

Save if

Save if the boat is small and the tow is short. The Frtcaty Sway Adapter or Eontab 48385 Adapter cost little, but only after you verify frame size and brake type.

FAQ

Before You Bring One Home

Do I need sway control on a boat trailer?

Many small boat trailers tow fine without it, because boats are often compact and ride low. A long or heavy boat, a high-profile cover, or frequent crosswinds can make sway more likely. Hitch hardware helps, but tongue weight and speed matter just as much.

Will frame brackets fit surge brake trailers?

Not always. The Eontab 48385 Adapter says it is not compatible with hydraulic brakes, and other brackets may have similar limits. Look for a brake note on the listing or ask the maker with your trailer model in hand.

Is the Fastway e2 Hitch worth it over the Fastway Connect Hitch?

The e2 builds sway control into the hitch, while the Connect is described as weight distribution with chains. If sway is what worries you, the e2 is the more complete answer, and the Connect makes more sense for a simple levelling job.

How do I check my tongue weight?

Use a tongue weight scale or a bathroom scale with a lever setup, with the boat loaded and the trailer level. Aim for roughly 10 to 15 percent of the loaded trailer weight. Then compare the number with the rating on the hitch you plan to buy.

What maintenance does a boat trailer sway setup need?

Rinse the hardware with fresh water after ramp use and check bolts for rust and looseness. Keep friction surfaces clean and free of grease unless the maker says otherwise. Replace worn brackets or balls before the next long haul.

Bottom line

The short version

Browse more sway control hitch for boat trailer on Amazon →
Bowen Higgins, RV Editor at RV Gear Lab

About the author

Bowen Higgins

RV Editor at RV Gear Lab

Bowen covers RV power, water systems, towing and leveling, upkeep and interior comfort, with a focus on matching gear to the rig, the hookups and the way you actually travel.

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