What Is a Trailer Arm?

What Is a Trailer Arm?

A trailer arm is a pair of metal links that connect the rear axle to the body (chassis) of your vehicle. These help eliminate the need for leaf springs and allow your rear axle to move up and down freely while maintaining proper vehicle alignment.

However, the bushings that prevent wear on your trailing arms will eventually start to wear out. This will cause issues for the back of your vehicle and can be expensive to repair.


Aside from enhancing the look of your vehicle, this product can enhance the ride quality and eliminate traction loss. It also helps prevent wheel hop and sway back. This is a GM inspired component made from 25.4 mm diameter tubing, with poly bushings.

The best part is, it’s adjustable! A set of four brackets are included, allowing for infinite adjustment.

The top mounted bracket can be positioned in a variety of positions, while the bottom mount is bolted directly to the subframe.

The sturdily constructed bracket can accommodate lifts of up to 2″ without requiring the installation of a spacer.

This tidbit is a must have for any discerning Subaru owner.

Using the best possible materials, the resulting component will withstand years of abuse, giving you peace of mind.
The main benefactor is the subframe, which will be more stable and less likely to fail, which can have a huge impact on your overall driving experience.
The company that produces this item is well known for its superior quality, which means you can expect a long and trouble free ownership.
The company has been a leader in automotive technology for over three decades, providing cutting edge products that are designed to perform under demanding conditions.

Rear Stabilizer

A rear stabilizer bar, also known as an anti-roll bar, is a piece of metal that Trailer Arm is attached to the rear of the vehicle. This bar distributes force to both sides of the car’s body and helps to keep it stable during turns.

The diameter of the stabilizer bar varies from make to make, but is generally an inch or two in diameter. If your front tires are five feet apart, you can expect the bar to be about four feet long.

These bars are securely bolted to the rear suspension on each side with bushings and brackets. They can flex and rotate, but they must remain in place on the suspension.

You can find this type of stabilizer on many types of trailers, including motorhomes, travel trailers and fifth wheels. Some models are equipped with an automatic sway control that keeps the trailer in line by pulsing the brakes when sway is detected.

There are many ways to reduce sway when towing your RV, but the most common is with a weight distribution system. These systems use a portion of the tongue weight to distribute it from the back of the tow vehicle to the front of the trailer.

Another option is to install a sway control device that uses friction to prevent the trailer from swaying. These devices are more expensive than a weight distribution system, but they can be helpful when towing in slick conditions or in tight parking spaces.

Some of these sway controls are designed to be mounted to the hitch, while others can be affixed directly to the trailer. Both can work to help reduce sway, but some of them are more effective and cost less.

A good way to know which type of sway control is best for you is to try out a few different ones on your own. This will help you determine which one works best for you and which ones you may want to remove or replace.

This is a great way to get the most out of your trailer while on the road. The sway control will help you stay in control of your trailer and your tow vehicle as you drive down the highway, and it can even help prevent accidents.


The arms are crafted from thick galvanized steel that provides corrosion protection and can handle a wide range of weights. They also have a smooth, polished finish and are coated with a durable paint. They’re backed by a lifetime warranty and come with a super-sturdy mounting bracket that makes backer plates unnecessary in most installs.

The arm is secured to the frame using a metal hanger that features 3 laser-cut holes and a template for mounting. The hanger also includes a 2″ square hole through which a steel pipe can be fed for frame reinforcement.

Axle-less Suspension

The Axle-less suspension system is constructed of the same basic components as an independent suspension: a control arm that holds the jounce spring, rebound spring and outboard arm. Premium urethane bushings secure the arm in place, providing a quiet ride while also eliminating any squeaks or rattles that may occur from uncontrolled movement of the wheel and tires.

Axle-less units are also backed Trailer Arm by the same industry-leading lifetime warranty as our other suspension arms. The jounce and rebound springs are made from Aeon(r) hollow rubber, which offers progressive spring rate and shock absorption.

Unlike conventional leaf springs, which are often attached directly to the trailer’s frame, a torsion axle uses a round bar inside a tube that is connected to a short trailing arm. The bar twists when the wheel moves up and down on uneven or bumpy terrain. A series of rubber cords are inserted between the flat sides of the axle bar and the housing, further restricting unwanted movement of the wheel.

Torsion axles are available in full beam models and side-to-side units that do not require a beam axle. Those options can be used with a wide variety of trailers, including sloped designs.

Another way to resist wheel movement is to use a trailing arm, which twists the wheel. Most trailing arms feature height adjustment so that trailers can be towed at different angles, whether rearward, behind or trailing the axle. A few units offer additional clearance, allowing for up to six inches of adjustment between the axle and the trailer’s tarp roll.

Easy to Install

The installation process is relatively quick and easy. It’s a matter of putting the right parts in place and assembling them. This is especially true of the trailer arm, which is incredibly lightweight and simple to install. It’s also easy to modify the arm length and adjust the height for different wheel sizes.

The best part of this product is that it doesn’t require any special tools, like a saw, hammer, or jack for example. Using the optional mounting hardware that ships with it, you’ll be able to easily mount your new trailer arm on the front of your vehicle.

It also provides several features that make the job easier than ever, such as auto-generated build options and an automated QA process. The built in QA tool can even check for a number of common bugs and errors, so you can rest assured that your install will go as smooth as possible.

If you’re looking for something a little more specific, consider the various command line options that you can use to set up a customized installation environment. You can also control the level of detail that EasyInstall displays about the progress of its tasks, by setting the -v option.

As of 0.6a10, it’s not necessary to use this option to get the most out of EasyInstall; it automatically determines whether a given directory handles.pth files and treats it as such. However, if you want to override EasyInstall’s judgement and use the.pth file as a flag to tell it where to install the big stuff, this is the way to go.