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When customizing your new Millroad deckover trailer, the decision of which axles to get can be intimidating, especially when you consider that having the correct axles is essential for safety. The good news is that you don’t need to have a background in mechanics to understand what axles are and how they work. With this short overview, we’ll guide you through what you should know to get the right setup for your needs.

How Do Trailer Axles Work?

In the most basic terms, the axle is a shaft that transfers the trailer weight and drive to the wheels. This simple-sounding shaft, though, may be the most complex part of the trailer. Loads that are too heavy or are not balanced correctly in relation to the shaft and wheels can cause the trailer to drift from side to side or become unstable.

Load Capacity

Axles are rated by a load capacity that specifies the amount of weight that they can support. Trailers with multiple axles can carry the sum of all these load capacities, as long as the tires and towing vehicle are also rated for the total weight. The actual amount of weight that a trailer can safely carry is the smallest load capacity rating for any part. This means if your trailer has two Disc-brake Axles rated for 5,200 pounds, it is capable of carrying 10,000 pounds, if but the tires are only rated for 4,000 pounds, the trailer can only safely carry 4,000 pounds until you replace the tires.

Axle Types

Leaf springs and torsion axles are the most common options for a trailer. Both types do the same job. The biggest difference between them is how they suspend the load.

Leaf Springs

Spring axles work using a spring to support the trailer and load. Usually, the springs are positioned under the shaft, but some arrangements have the spring across the top of the shaft. This type of axle costs less when you first purchase it, but it uses a lot of moving parts. All of these moving parts wear out over time, especially when they are constantly exposed to the rain, mud, snow, and rough roads that are inevitable in Canada.

Torsion

Low Bed Axles are made up of a square spindle surrounded on all four sides by rubber. The spindle is connected to torsion arms that then attach to the wheels. The core moves back and forth against the rubber, and its motion makes the torsion arms turn the wheels.
The motion of the spindle and torsion arms is smooth, and the system absorbs shocks well, which makes it especially ideal for the gravel and back roads of Canada. Though this arrangement typically costs more up front than springs, the lack of maintenance and downtime save money in the long run. Because of all of these benefits, we recommend TorFlex torsion axles to our customers whether they are driving on nicely paved roads or the roughest trails that the country has to offer.