- How To
- Trailer Knowledge
Key Takeaways: Quick Decision Guide
- Retorque the lug nuts early and more than once. This is the single most skipped item on a new trailer and the one most likely to cause a problem.
- Check tire pressure cold, before the first tow, not at the end of a trip when the tires have heated up.
- Feel the hubs at your first fuel stop. A hub running noticeably hotter than the others is worth stopping for.
- Set the brake controller gain on an empty road before you tow a loaded trailer in traffic.
- Book the first inspection around the 12-month mark rather than waiting for something to feel wrong.
The one thing to do on a new trailer is retorque the lug nuts within the first 50 miles, then again a couple of times over the next few hundred. New wheel assemblies settle as they are loaded and heated, and fasteners that were correct in the yard can be loose by the time you get home. Everything else on this list matters, but nothing else on it fails as quickly or as consequentially.
A new trailer is not a finished object the way a new appliance is. It is an assembly of bearings, fasteners, seals and suspension components that settle into their working positions over the first few hundred miles. The first 90 days are when that settling happens, and a short list of checks in that window prevents most of the problems that otherwise show up in year two.
Lug Nuts: The Retorque Schedule
Wheel studs and lug nuts stretch slightly under their first heat cycles, and the clamping surfaces between wheel and hub bed in. The result is that torque falls off after the first loaded miles even when it was set correctly at delivery.
Most trailer manufacturers ask for a retorque within roughly the first 50 miles, again somewhere around 100 miles, and once more near 200 miles. Check the schedule in your own owner's manual, because the intervals and the torque figure both vary by wheel and stud size. Work in a star pattern rather than around the circle, and use a torque wrench rather than an impact gun, which gives you no feedback about where you actually landed.
After the initial sequence, most owners settle into checking at the start of each season and before any long tow. It takes a few minutes and it is the cheapest insurance on the trailer.
Tires Before the First Tow
Trailer tires are built differently from passenger tires, with stiffer sidewalls and a load rating that assumes they run at or near their maximum cold pressure. Underinflation is the usual cause of trailer tire failure, and it does its damage gradually through heat rather than suddenly.
Check pressure cold, meaning before the trailer has been towed that day, and set it to the figure on the tire sidewall unless your manual says otherwise. Do this before the first trip rather than after it, since a trailer can sit on a lot for months before it reaches you and tires lose pressure over time regardless of use.
Look at the date code on the sidewall while you are there. It is worth knowing how old the tires are, because trailer tires typically age out before they wear out. Spares, covers and other consumables are available through trailer parts and accessories if you want to sort that out early.
Wheel Bearings in the First Season
New bearings arrive packed with grease, and that grease redistributes over the first few hundred miles as the bearing warms and turns. Nothing usually needs to be done about that, but it is worth confirming that all four hubs are behaving the same way.
The simplest check costs nothing. At your first fuel stop on a long tow, put a hand near each hub. They will all be warm. A hub that is noticeably hotter than the others is the one worth investigating before you continue. Heat is the earliest signal a bearing gives you, and it usually arrives well before any noise does.
Service intervals for repacking vary with how the trailer is used, and a trailer that sees water regularly typically needs attention sooner than one that does not. If a hub concerns you, trailer repair and service is the faster route than guessing.
Brakes and the Breakaway System
If your trailer has electric brakes, the controller in the tow vehicle needs its gain set for this specific trailer, and the setting that suited your last trailer is unlikely to suit this one. Find an empty stretch of road, get up to around 25 miles per hour, and use the controller's manual lever on its own. You are looking for firm, even braking without the wheels locking. Adjust and repeat until it feels right, then check it again once the trailer is loaded, because load changes the answer.
Trailers fitted with a breakaway system carry a small battery that needs to hold a charge to do its job. Confirm it is charged before the first tow and check it at the start of each season. It is a component that sits unused for years and then matters a great deal for a few seconds.
Coupler, Chains and Wiring
Walk the front of the trailer before each of the first several tows until the routine is automatic. The coupler latch wants to be fully seated over the ball and pinned. Safety chains generally cross underneath the tongue so they can cradle it if the coupler lets go, with enough slack to turn and no more.
Wiring is where new trailers most often show a small fault, usually a connector that was not fully seated or a ground that needs cleaning. Have someone stand behind the trailer and run through running lights, brake lights and both turn signals. Doing this on day one means you find the problem in your driveway rather than on a shoulder.
Enclosed Trailers: Seams, Seals and the Roof
Enclosed trailers add one category the open trailers do not have, which is keeping water out. Roof seams, the front and rear corner trim, and the seals around doors and vents are all worth a look after the first heavy rain rather than after the first leak.
The check is simple. Park somewhere shaded, close the trailer up, and look for daylight at the seams from inside. Any light coming through is usually a sealant job rather than anything structural, and it is far cheaper to address before water has been getting in for a season.
Door seals compress into position over the first few months. If a door is difficult to latch when new, that generally eases. If it becomes easier than it should be, the seal may be taking a set and is worth mentioning at your first service visit.
Booking the First Inspection
New trailers from TrailersPlus include two complimentary 40-point inspections, at the 12-month and 24-month marks. Book the first one on the calendar rather than waiting for a symptom, since the point of an inspection is finding things that have not announced themselves yet. The complimentary safety inspection covers the running gear, brakes, lights and structure in one visit.
It is also the right moment to understand what your coverage does and does not include, because the answer shapes how you handle anything that comes up later. The trailer warranty coverage details are worth reading once, early.
Build the Habit in the First Season
None of this is complicated and none of it takes long. What makes the difference is doing it in the first 90 days, while the trailer is settling and while you are still paying attention to it. Owners who establish the routine early tend to keep it. Owners who skip it usually find out about a problem at the least convenient moment.
TrailersPlus is the nation's largest independent trailer dealer, with over 90 locations nationwide and more than 11,600 trailers in stock. It is the only retail seller of Interstate, America's number one brand in cargo trailers, and carries Carry-On across the open utility range. Roughly 95 percent of trailer weight is sourced in the USA, and customers rate the company 4.8 across more than 10,000 reviews. If anything on your new trailer does not look right to you, that is worth a conversation rather than a guess. More owner guides are collected in the trailer owner resources section.
Frequently Asked Questions
How soon should I retorque the lug nuts on a new trailer?
Most manufacturers ask for a first retorque within roughly the first 50 miles, followed by checks near 100 and 200 miles. Your owner's manual gives the torque figure and interval for your specific wheels. Use a torque wrench in a star pattern rather than an impact gun.
Do new trailer wheel bearings need to be repacked right away?
Usually not. New bearings arrive packed, and the first service normally falls at the interval in your manual rather than on delivery. What is worth doing early is checking hub temperature at a fuel stop on the first long tow, since a hub running hotter than the others is the earliest warning you get.
What tire pressure should a new trailer run?
In most cases the cold pressure stamped on the tire sidewall, unless your owner's manual specifies something different. Set it before towing rather than after, because pressure readings rise once the tires have heated up and you will end up underinflated.
How do I set the brake controller gain for a new trailer?
On a clear road at roughly 25 miles per hour, apply the controller's manual lever alone and adjust until braking feels firm without the wheels locking. Recheck it once the trailer is loaded, since the correct setting typically changes with weight.
When is the first service due on a new trailer?
New trailers from TrailersPlus include complimentary inspections at the 12-month and 24-month marks, and booking the first one on schedule is the simplest approach. Anything that seems off before then is worth looking at sooner rather than waiting for the appointment.
