What Equipment Is Required to Be on a Trailer? The Legal Checklist

Wondering what equipment is required to be on a trailer before it touches a public road? There's a federal baseline every trailer must meet, plus state rules that layer on top. Here's the working checklist, and where to verify your state's version.

The federal baseline: lighting and reflectors

Federal Motor Vehicle Safety Standard 108 sets the lighting floor for every trailer sold in the US: tail lamps, stop lamps, turn signals, a license-plate lamp, and red rear reflectors, plus amber side reflectors toward the front. Trailers 80 inches or wider add clearance and identification lamps. New trailers from legitimate manufacturers, including everything we stock in our trailer lines, arrive wired for this; the checklist matters most on used and home-built units. NHTSA's road-safety resources cover the federal side in depth.

Safety chains, required everywhere

Every state requires safety chains rated for the trailer's weight, and the standard practice is to cross them under the tongue so a failed coupling drops into the cradle instead of digging into pavement. Use both chains, leave slack for turns, and never twist links to shorten them.

Brakes and breakaway systems, where states differ most

Most states require trailer brakes above a GVWR threshold that commonly sits around 3,000 lb, but the trigger ranges from roughly 1,500 to 4,500 lb depending on the state, and some require brakes on every axle above it. Heavier trailers also need a breakaway system: a charged battery that slams the brakes if the trailer separates. If your trailer has brakes, your tow vehicle needs a matching brake controller. This is the section to verify with your state DMV before towing across lines.

The rest of the checklist

Fenders/mudguards are required in many states unless the tow vehicle shields the wheels. Registration and plates: nearly every state titles and plates road-going trailers; weight thresholds vary. Load securement: straps or chains rated for the cargo, flags on overhanging loads. And the coupling itself must be rated for the load, our trailer ball size chart walks through matching ball, coupler, and receiver class.

FAQ

Do the trailers you sell arrive road-ready?

Units are built to federal equipment standards and each listing states its brake configuration, check your state's brake threshold against the GVWR on the listing, and register per your DMV.

Are requirements different for farm trailers?

Many states exempt implements of husbandry used locally, the exemption usually dies the moment the trailer runs a highway at speed. Verify locally.

What gets people ticketed most?

Dead lights and missing chains, the two cheapest items on the whole list. Walk the trailer before every tow.