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Hitch & Sway

Problem first, product second

Keep the Trailer Straight

Trusted, plain-English guides to hitches, weight distribution, sway control and brake controllers - matched to what you actually tow. Every figure is sourced, and where we cannot source one, we say so.

A pickup truck hitched to a travel trailer at a highway rest area, with a person working at the coupler
93
Pages, all written for this site
38
Real products, no invented listings
0
Products we claim to have lab-tested
0
Prices published anywhere on this site

Top picks

What We Would Buy

The number one pick from each of our buying guides. We publish no prices - every button goes to Amazon, where the current price is shown.

Six sections

Where to Start

Towing problems fall into six groups, and they connect: sway usually traces back to tongue weight, a sagging truck traces back to payload, and dead brakes almost always trace back to a connector.

A pickup towing an enclosed trailer on a highway, seen from a following vehicle

Sway Control

Trailer Sway & Sway Control

Sway is almost never a mystery. It comes down to tongue weight, load position or speed - and only one of those three costs money to fix.

A weight distribution and sway control hitch fitted to a trailer tongue, with spring bars and chains visible

Weight Distribution

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.

An adjustable ball mount with two trailer balls fitted, shown against a plain background

Hitches

Hitches, Receivers & Ball Mounts

Class, receiver size, ball diameter, drop. Four numbers decide whether your setup is right, and three of them are stamped on parts you already own.

Schematic plate showing a brake controller face with a gain readout - original illustration, not a product photo

Brake Controllers

Trailer Brake Controllers

If the trailer has electric brakes, something has to tell them how hard to work. That something is a controller, and how you set it decides how the rig stops.

A 7-pin trailer socket opened up with its individual wires connected to the terminals

Wiring & Mirrors

Wiring, Lights & Towing Mirrors

Nearly every trailer electrical fault is corrosion or a bad ground. Knowing which wire does what turns a roadside mystery into a five-minute check.

Buying guides

The Two Biggest Decisions

A weight distribution hitch and a brake controller are the two purchases that change how a rig behaves most. Both are sized to numbers you can measure yourself first.

A tow vehicle and trailer coupled at a highway rest area

Best brake controller

Best Brake Controllers

Hardwired and plug-in proportional controllers compared on published specifications and how each behaves when something goes wrong.

Top pick: Tekonsha Prodigy P3 Trailer Brake Controller

Check price on Amazon

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Read these first

The Argument of the Site

Four pages carry most of what this site has to say. If you read nothing else, read these - two of them will probably save you money rather than cost you any.

Schematic plate showing a trailer yawing about its coupling with restoring forces marked - original illustration

How to

How to Stop Trailer Sway

The in-the-moment response, then the load corrections that keep it from happening again - and when hardware is genuinely the answer.

Read it

Schematic plate showing stacked load bars measured against a limit - original illustration

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.

Read it

Schematic plate showing capacity bars measured against a rating line - original illustration

Guide

How Much Can My Truck Tow?

The four ratings that constrain a tow, where each is published, and the order to work through them.

Read it

Schematic plate showing a round seven-pin connector face - original illustration

Reference

7-Pin Wiring Diagram

The seven circuits and what each one does, the common color convention, and how to confirm it on your own vehicle.

Read it

How this site works

What We Will and Will Not Claim

We do not test in a lab

We have no test rig and no instrumented stopping-distance data, and we never write as though we do. Picks come from published specifications and from how each design actually works.

Every figure is sourced

Specifications link to the manufacturer's own page. Regulatory claims link to the regulation itself. Where nobody publishes a number, the page says so instead of estimating.

No prices, no star ratings

There is no live price feed on this site, and a stale price is worse than none. Every button goes to the retailer, where the current price is shown.

The free fix comes first

Most sway is a loading problem, and most lighting faults are a ground. We say that before we show you anything to buy, because it is true.

Work it out

Calculators

Three calculators that work from numbers you measure yourself. They hold no database of vehicle ratings, because we have no licensed source for one and publishing capacity figures we cannot verify would be a safety risk.

Tongue weight calculator

Enter your measured tongue weight and loaded trailer weight. Returns the percentage and whether it sits in the safe band.

Do I need a WD hitch?

A short decision path from your own numbers to a yes or no, and which bar rating band to look at.