Single Axle, Tandem Axle...What's the Difference?

If you're considering the purchase of a new, custom-built cargo trailer, you may be wondering what type of axle is best for your needs. The two basic options are the single axle and the double (tandem) axle. So what are the differences between these two axle types? Does the axle type affect trailer performance? Is one more expensive than the other? We'll answer these questions below as we explore the differences between single and tandem trailer axles.

Single Axle

First, let's talk about the singe axle option for you custom cargo trailer. A single axle trailer, as the name implies, has just one axle with one wheel connected to each end. The single axle is connected to the trailer either via the springs or is fixed directly to the trailer bed with clamps or some other type of supporting hardware.


Single axles have several advantages. If you choose a single axle trailer, you'll likely experience better fuel economy, as single axle trailers weigh less and require less fuel combustion energy to tow.

Single axle trailers are often priced lower than their double axle counterparts. This makes them a more affordable option for first time trailer buyers, small businesses, hobbyists, or people purchasing for personal use. They can also be more affordable to maintain, as there is one fewer set of tires, bearings and brakes to keep up and/or replace when the time comes.

Single axle trailers can also be somewhat easier to maneuver than a double axle trailer of the same size. This makes them easier to park in compact spaces.

There are some disadvantages to choosing a single axle trailer. For one thing, single axle trailers likely won't be able to carry heavier payloads when compared to the tandem axle trailers. Single axle trailers also carry more weight per tire, making it not unusual for the tires to wear out more quickly than they would on a tandem axle trailer. Finally, the single axle doesn't give the added stability that a dual axle does, so the ride can be a bit bumpier.

Tandem Axle

Tandem axles differ from single axles in that they consist of two axles places closely together. This structure is designed to help evenly disperse the weight of the trailer's cargo. 

The tandem axle has specific advantages over the single axle. First, the tandem axle provides better stability, especially at highway speeds. Tandem axles also typically have better suspension.

When property loaded, a tandem axle trailer is less prone to swaying and bouncing during the haul. Again, this superior stability makes tandem axle trailers ideal for people who need to haul large cargo long distances, and who may have to travel at higher speeds for long periods of time. 

As for the disadvantages of the tandem axle, the first one that comes to most trailer owners' minds is the cost. Tandem axle trailers often cost more than single axle trailers because of the added benefits of stability, better suspension, etc. 

Another disadvantage is the added weight. Because tandem axle trailers weigh more, they typically do not provide the same fuel efficiency as a single axle trailer. Since fuel economy is weaker with a tandem axle trailer, fuel costs should definitely be factored into your overall budget when comparing trailer options. 

One other drawback to tandem axles is the additional hardware, tires, etc. that will need maintenance. As we mentioned earlier, the single axle trailer has one less set of tires, bearings and brakes to fix or replace. 

After comparing single and tandem axle trailer options, your final decision should be based on what is best for your hauling needs and your budget. If you plan on towing frequently and are concerned about safety and stability, a dual axle trailer would likely be the better option. If you're more concerned with getting a lower price and don't plan to tow long distances, the single axle would probably be just fine for your needs. 

If you would like to learn more about our single and tandem axle trailers, please feel free to browse our products. And don't hesitate to connect with us online or by phone if you have any questions. Call  1-877-45TRAILER (1-877-458-7245) or send us an email through our contact page.