Single-Axle vs. Dual-Axle Trailers

Last Updated on January 25, 2024 by Matthew Sholly

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Last Updated on January 25, 2024 by allprotrailersuperstore

One of the first factors to consider when investing in a towing unit is whether you need a single- or double-axle trailer. Knowing the differences between these two configurations can help determine which is ideal for your situation. Each trailer type has pros and cons for different applications, but that doesn’t mean one is a better choice than the other. Choosing the right unit depends on your needs for load capacity, usage, budget and maneuverability.

Here is a look at single- vs. dual-axle trailers to help clarify which may be best for your operations.

Table of Contents

What Are Single-Axle Trailers?

A single-axle trailer has one axle with a wheel on each end. This simple rig design attaches to the trailer with clamps or springs. Compared to dual models, single-axle trailers are smaller and have one set of wheels. Despite its smaller size, the single-axle configuration can haul a multitude of loads — whether you own a landscaping business or pull off-roading vehicles during the weekend.

Because of their size, single-axle trailers are easier to maneuver in tight spaces and around buildings. If you’re trying to park in an area with limited room or need to get around sharp corners, a single-axle trailer gives you more leeway. The unit’s adjustable towing angles and lower weight may make towing more manageable.

A single-axle trailer’s compact size also makes it more fuel-efficient. The trailer has fewer parts to maintain, which may make upkeep less expensive. Maintaining and replacing two tires and their components is more economical compared to four.

Pros of Driving With One Axle

The streamlined single-axle trailer design makes this configuration a cost-effective solution for a range of industries and recreational uses. Advantages of working with a smaller unit include:

• Better fuel economy
• Fewer components to maintain
• Improved maneuverability
• More affordable purchase price
• Less weight to manage

The lightweight rig helps improve steering and is especially beneficial when stopping. Hauling a trailer with one axle may allow for shorter stopping distances, creating less wear on your truck or mid-sized vehicle.

Cons of Driving With One Axle

While single-axle trailers have many benefits, a few drawbacks of the units include:

• Potential for greater wear: With only one set of tires holding up the unit, a single-axle trailer may undergo more stress from absorbing the weight of the load. Moving heavy loads with a single-axle unit may wear out the trailer tires faster because there is more weight on each wheel.
• Less load capacity: Single-axles have less load capacity, which limits how much equipment or material you can haul.
• Less stability: If a single-axle trailer doesn’t have suspension, you may not have as much stability or load cushion when traveling over bumps.

Another concern for single-axle units is that they may not have brakes. A trailer’s braking system depends on its weight. Small rigs carrying less weight can often operate securely at higher speeds without a separate brake structure. Plus, it’s not always feasible to manufacture every unit with brakes. If you’re hauling a lightweight trailer and cargo, you can likely rely on the brakes in a modern vehicle to stop the truck and trailer safely.

Most states necessitate independent braking systems when trailers exceed a gross weight of 3,000 pounds, although some states have smaller or larger thresholds. Check your state’s trailer braking system regulations to ensure you’re both compliant and safe with a single-axle unit.

Uses of Single-Axle Trailers

Single-axle trailers are ideal when you have smaller loads and lightweight cargo. Though they may not be the biggest option on the lot, they can still get the job done for many people. A single-axle trailer may be good for hauling the following items:

• Large appliances
• Building supplies
• Furniture
• Lawn care equipment
• Motorcycles
• Landscaping materials, like mulch, dirt, stone and sand
• Off-roading vehicles
• Small tractors

It’s important to understand a single-axle trailer’s weight limits and avoid overloading them. If you know what type of cargo you want to haul, be sure to look for a unit that can support its weight. Placing too much load on the rig can cause problems with the hitch and affect your towing vehicle. Overloading a single axle can also increase your risk of tire blowouts and accidents.

Without exceeding the gross weight limit of the trailer, you can haul just about anything. If you opt for an enclosed trailer, your assets will be secure. If you choose an open-bed unit, make sure you properly strap down your freight.

What Are Dual-Axle Trailers?

A dual-axle trailer, also known as a tandem-axle, has two sets of wheels. The second axle is positioned directly behind the first, and both axles have a wheel on each end. With four tires holding up the unit instead of two, a dual-axle trailer can evenly disperse the weight of your cargo.

Because of its boosted support and higher load capacity, a dual-axle trailer can increase your range of applications. Dual-axle units give you more room to haul massive loads, making it the perfect solution if you’re looking to expand your company in the future. Investing in a dual-axle trailer gives you room to grow, no matter if you’re extending your fleet of equipment or towing items in bulk.

Although the larger units are often more expensive than single-axle rigs, they usually deliver a higher return on investment over time. Their increased stability also allows you to haul heavy payloads, even when driving at highway speeds.

Advantages of Dual-Axle Trailers

A dual-axle trailer may be a good fit if you need to transport heavy loads or carry multiple items. A tandem-axle trailer is also ideal for traveling long distances. This could be helpful if your company needs to make interstate exchanges, or you need to travel several hundred miles to pick up heavy equipment.

Additional benefits of a dual-axle trailer include:

• Improved stability: A dual-axle trailer offers improved weight distribution due to its four tires and suspension system. This improved stability reduces the amount of swaying you experience. When your truck and trailer are steadfast, you can improve hauling safety for both you and the other drivers on the road. If you’re looking for even more trailer stability, you can install anti-sway bars for help driving through wind-prone areas.
• Built-in braking system: In most cases, tandem axles have independent braking systems. The two types of trailer braking methods include electric and hydraulic. Electric versions rely on your vehicle’s electrical system for power, while hydraulic surge brakes are self-contained in the trailer. Hydraulic brakes activate in response to the towing vehicle. Brakes make towing safer and improve stopping distances when hauling hefty weight.
• Fewer tire repercussions: Because double-axle trailers have four tires, a flat tire may have less of an effect on your unit. Changing the tires on a larger trailer can also be easier if you experience a blowout because you may not have to use a jack.

Disadvantages of Dual-Axle Trailers

With a more complex design, a tandem-axle trailer tends to cost more and weigh more compared to its smaller counterpart. Relying on a bigger trailer to carry your large cargo may have a few other disadvantages, including:

• Higher fuel usage: Because of its size and weight, the unit will also increase your fuel usage. However, one way to combat poor gas mileage is to invest in a trailer engineered with quality composites. They can help create a lighter and tougher build compared to typical materials.
• Increased maintenance expenses: Your maintenance costs relate to the number of tires, as well as the size of the trailer. In both cases, a double-axle unit could cost more to maintain.
• Less navigable: Unlike a single-axle unit, a dual rig won’t be able to fit in tighter parking spaces or make sharp turns. It’s important to be especially careful of your surroundings when maneuvering a large dual-axle trailer.
• Higher toll payments: If you plan to use your trailer on toll roads, you may pay a higher fee for a dual-axle trailer. Some toll roads determine their prices by the number of axles in your vehicle or the vehicle’s weight. Either way, a dual-axle unit may cost more than a single-axle trailer.

Another consideration for dual-axle trailers is the level of your freight. Level towing means your products are level at all times. It makes for a safer operation, and it also increases the lifespan of your tires.

Uses of Tandem-Axle Trailers

A tandem solution can carry many of the same items as a single-axle trailer, but at much heavier weights. For example, with a tandem-axle trailer, you could haul larger ATVs, a higher volume of materials or several large appliances. Typical uses specific to a dual-axle trailer include:

• Bulk items
• Generators
• Heavy equipment
• Industrial machinery
• Multiple vehicles
• Race cars
• Tractors
• Trucks

The heavier the item you’ll be hauling, the bigger the trailer you may need. Make sure to reference the equipment’s manual and ask the experts for a trailer’s load capacity before purchasing. Like single-axle trailers, you should avoid exceeding the maximum weight limit on a dual-axle rig to avoid accidents, damage to the unit and damage to your vehicle.

Single-Axle and Dual-Axle Similarities

Both a single and tandem-axle trailer can transport a wide range of cargo within their weight limits. You can choose between open or enclosed solutions with both configurations, too. Aside from a few other similarities like required maintenance and customizability, both trailer types require special attention to braking.

Hauling a trailer of any size increases the stopping distance of your entire rig. Once you attach a trailer to your truck, SUV or another vehicle, you need more time and distance to come to a complete halt. Braking with added weight behind you also wears out your vehicle’s brakes faster.

Talk to a professional to figure out what kind of brakes may work best for your trailer size and driving experience.

Single-Axle and Dual-Axle Differences

Single- and dual-axle units have the same purpose: hauling cargo safely. However, the differences are what you want to focus on when deciding which matches your expectations. Three main differences to examine include the gross combined weight rating, the tongue weight and the hitches.

1. Gross Combined Weight Rating

Weight is an important variable when considering trailer types. In addition to a trailer’s payload capacity, you should consider your setup’s gross combined weight rating (GCWR). This term refers to the total combined weight your setup can handle safely.

To calculate a potential GCWR, add the following values:

• The weight of your towing vehicle
• The weight of any vehicle occupants or luggage
• The weight of the loaded trailer

You can check your calculated GCWR against the number given by your vehicle manufacturer to ensure you are within a safe range. The GCWR of a single-axle trailer will be less than a heavy-duty tandem-axle. Staying within your GCWR can help make sure your towing and braking are effective and safe.

2. Tongue Weight

When comparing the two configurations, you’ll also want to consider tongue weight. Tongue weight describes how much of the load is on the hitch. Between 5% and 15% of the trailer weight should rest on the hitch. If you undershoot this weight, the joint may sway more than usual. If there’s too much pressure on the hitch, steering may become more difficult.

Calculating your tongue weight may look different depending on whether you have a single- or dual-axle trailer. For example, you may be able to prop a standard bathroom scale on a cinder block to measure the tongue weight on a single-axle rig. You may need to purchase a specific tongue weight scale to measure the weight on a dual-axle trailer.

3. Hitches

Single- and dual-axle configurations require properly sized hitch balls. The size of the trailer corresponds to the size of the ball — so a more compact rig will need a smaller hitch, and a larger trailer will need one that matches its size. An ill-fitting hitch ball could cause your trailer to detach while driving.

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Which Trailer Is Best for Your Operations?

The best trailer for your operation depends on how much weight you’re pulling, the maneuverability you need, the type of towing vehicle you have and your budget. Before you invest in a trailer, be sure to calculate the weight of what you’ll be pulling and check how much your truck can handle. If you think you may be hauling heavier weight in the future, it may be wise to select a larger trailer that can grow with you. If you commonly tow items within a smaller weight range, compact, single-axles are a good option.

Trust All Pro Trailer Superstore for Your Trailer Solutions

If you’re unsure which trailer configuration best suits your application, you can rely on our team of experts for support. We’ll partner with you and learn about your situation to narrow down an optimal make, model and size of trailer from our wide selection. In addition to our new and used single- and dual-axle trailers, we also offer repairs, finance support, customization, inspection and a range of other services.

Take a look at our trailer inventory or talk to a Trailer Superstore rep for help today.

Single-axle and dual-axle trailers offer various benefits depending on which kind of travel trailer you prefer. The difference between single and dual-axles includes weight capacity, size, length and braking, among other distinctions. To choose a trailer that fits your needs, consider each axle’s benefits, pros and cons.

What Is the Difference Between Single-Axle and Dual-Axle Travel Trailers?

The short answer is that a single-axle trailer has one axle on each end of the wheel, while a dual-axle trailer or tandem-axle trailer has two axles placed close together to distribute weight safely. Single-axle trailers often come in smaller sizes and are relatively easy to handle, while dual-axle trailers are larger and can carry more weight and passengers.

How Do Axles Work?

Axles play an essential role in braking and steering the trailer. With a rod that fits onto the wheels attached to the vehicle, axles ensure the wheels align correctly and hold up the vehicle’s weight. The size, type or number of axles often determine how much weight the trailer can handle and the vehicle’s load capacity.

Some types of axles include the following.

• Coil springs: Coil springs offer a wider range of navigational and improved suspension.
• Spring: Many spring axles are underneath the trailer.
• Trailing arm: Often found on the vehicle’s rear wheels and in aircraft gear.
• Torsion: Tubing usually conceals torsion axles.

Though you’ll see many of these axles in various vehicle applications, spring and torsion axles are the most common axles found in travel trailers.

Spring axles use a flat spring in proportion to the trailer’s load. Placing springs over or underneath the axle can lower the trailer’s height. Spring axles often give the trailer improved stability and detach quickly, making maintenance and repair easier. While cheaper than torsion axles, spring axles can be safe and effective.

Torsion axles have long rubber cords inside a tube, attached to an inner piece. The core piece connects to the torsion arms without metal-to-metal contact and produces a quieter axle. These kinds of axles often do not require as much maintenance besides regular lubrication of the wheel bearings.

Specific Differences Between Single-Axle and Double-Axle Trailers

The differences between a single-axle and dual-axle trailer depend on your size preferences, load abilities, parking needs, budget and towing requirements, among many others. Look at the number of people you plan to travel with or your fuel budget or towing vehicle capacities. However you plan to travel, the many differences between a single-axle or dual-axle trailer can tell you what trailer will fit your needs.

Try considering these areas to understand which trailer you want.

• Weight capacity: Think about how much weight you want to carry in the trailer. How many people will be traveling with you, or how many suitcases or food items will you take? A larger double-axle trailer may be able to handle heavier weights, while a single-axle trailer is better for a smaller number of travelers.
• New vehicles for pulling: If you plan to buy a new vehicle to tow the trailer, this may affect which trailer you want to invest in. For example, a dual-axle trailer may require a heavy-duty truck, while a single-axle trailer may only need a small SUV or van.
• Budget: There are a few price differences between single-axle and double-axle trailers. Many single-axle trailers cost less than other vehicles, while double-axle trailers cost less in maintenance but more in fuel.
• Trailer size: Consider the differences between trailer sizes. For example, many single-axle trailers are smaller than double-axle trailers, though both configurations often vary between 16 and 25 feet. Remember that single-axles are the size of a family sedan and are typically easier to move around because of their length. Double-axles need more room to park and are larger than 25 feet in some cases, but can handle the additional weight.
• Trailer functions: The function and style may vary between single-axle and tandem-axle travel trailers. Between both types, the ride is likely to be smooth regardless of the number of axles on the trailer. While the performance and towing experience may change depending on your weight preferences, both trailers handle themselves well.
• Towing: Single-axles are typically easier to pull because they are smaller and often weigh less than dual-axle trailers. Because of their lighter weight, single-axles may experience less rolling resistance and can often travel with less wind resistance. If you only have a smaller truck or SUV, you should be able to pull a single-axle trailer without issue. On the other hand, double-axle trailers may require more heavy-duty tow vehicles.
• Safety: Some single-axle trailers with a smaller gross trailer mass do not require brakes and may cause safety concerns. On the other hand, many double-axle trailers carry a larger load and need brakes for safety’s sake. Regardless of what you want, you should carefully consider safety issues before buying a single or double-axle trailer.

Choosing Single-Axle or Double-Axle Travel Trailers

To compare single-axle and double-axle travel trailers, you will want to look at each type’s weight, tires, smoothness and resale value. By comparing and contrasting the various pros and cons of each trailer, you may be better informed to make your final decision.

1. Weight

Consider how much food and supplies you want to bring on your trip. Some trailers can handle more weight than others, and you may also need extra room for more passengers. Weight distribution is another essential factor. A single-axle trailer may not have the best weight distribution, while a dual-axle trailer comes with special axles that help distribute extra weight. Dual-axles may make for better rides on back roads and a steadier drive.

2. Tires

The number and abilities of the trailer tires should be another comparison you look at. Dual-axle trailers often come with extra tires that assist you if a tire blows out. Single-axle trailers may not come with spare tires, but their compact nature ensures less tire maintenance overall.

3. Smoothness

Ride smoothness is a primary consideration for trailer owners. While there is not much difference between the smoothness of each kind of trailer, you’ll want to find one with less bounce, sway or roughness.

4. Resale Value

If you plan to sell your trailer after a few years, you may want to consider the value of single-axle or double-axle trailers over time. Consider investing in a new trailer that will hold its value. You can even make additional upgrades or changes to enhance the vehicle and make more money once you’ve decided to sell.

Pros of Single-Axle Trailers

There are many advantages of investing in a single-axle trailer.

• Affordable: The smaller frames and length single-axle trailers result in a lower price when buying the trailer, as well as cheaper fuel and maintenance costs.
• Lightweight: Their smaller size makes single-axle trailers lighter, and you can save more money on fuel.
• Quickly maneuvered: Single-axle travel trailers are easy to park and fit around tighter corners.
• Faster brake: Because single-axles are lighter, they can brake quickly.
• Easier towing: The vehicle that pulls the trailer will experience less wear and tear due to its smaller and lighter construction.
• Less maintenance: Less weight, fewer brake bearings and fewer tires mean you won’t have to maintain as many parts throughout the year.

Cons of Single-Axle Trailers

You should carefully consider the potential drawbacks of single-axle trailers before purchasing a new one. While the benefits may outweigh the downsides, you’ll want to be completely informed.

• Less able to carry weight: Because single-axle trailers are smaller, they may not be able to carry as many supplies or passengers.
• May not have brakes: Some single-axle trailers have no brakes and may pose safety concerns. Other buyers may want to consider adding new brakes, an extra cost that might be outside your budget.
• Hard on tires: Smaller trailers put more pressure on the tires. The weight distribution should be a consideration, as you may experience some wear and tear over time.
• May not have suspension: Some single-axle trailers do not include suspensions, making the ride a bit bumpier.
• Lack of length: A smaller single-axle trailer may not hold as much luggage as you need. The lack of space for a larger family or group may mean you need a bigger size or dual-axle trailer.

Pros of Dual-Axle Trailers

Many customers appreciate dual-axle trailers for their large size and ability to handle a high number of people and supplies. Dual-axle trailers also have several benefits besides size and weight capacity.

• Stability: Dual-axle travel trailers use their weight distribution to improve strength and reduce swaying during the drive. Many come with four tires and an improved suspension system that makes the trailer safer for you and your passengers. Some customers even install extra anti-sway bars that help the trailer drive in windy areas.
• Braking: Dual-axles come with built-in brakes in either electric or hydraulic configurations. Electric brakes often use the trailer’s electrical system to power the mechanism. Hydraulic brakes contained within the vehicle make towing safer while improving stopping and starting.
• Fewer tire issues: With extra tires, dual-axle trailers are easy to change in the case of a blowout. You may not feel the effect of one flat tire with spare tires assisting the drive.

Cons of Dual-Axle Trailers

While dual-axle travel trailers come with various helpful features and essential benefits, every customer should consider these potential drawbacks.

• Increased fuel usage: Because of their increased size, many dual-axle trailers use more fuel than single-axle travel trailers. Some customers outfit their trailers with composites that make for a light and durable build to save fuel.
• More maintenance: The trailer’s extra tires and size may require more maintenance over time.
• Not as easy to navigate: Because they are larger, many double-axle trailers may not be as easy to navigate, fit into tight parking spaces or make sharp turns.
• More tolls: Using a dual-axle trailer may result in higher tolls or fees on the highway. Some toll roads choose their prices by measuring the vehicle’s weight and finding the number of axles on the trailer. A dual-axle trailer may end up costing more than a single-axle trailer.

Determining Which Type of Trailer Is Right for You

A travel trailer’s weight capacity is one of the best ways to find the correct choice for your needs. Often, a single-axel trailer’s weight limits don’t have the flexibility for higher demands and are much better suited for lighter supplies and fewer passengers. On the other hand, double-axle trailers can handle heavy weights and more passengers.

Depending on how many people you plan to travel with and how much you are willing to tow, either trailer may be a good decision. It all hinges on how much you want the trailer to carry, as an overloaded trailer could result in an accident. To determine which type of trailer to use, you’ll want to look closely at gross combined weight, tongue weight and hitches.

Gross Combined Weight

A vehicle’s gross combined weight includes the total weight the trailer can handle. It can be imperative when choosing a trailer that can fit your supplies and passengers. To calculate the GCW, add the towing vehicle’s weight and the weight of the luggage, occupants and fully loaded trailer. Compare this number to the manufacturer’s GCW rating to see if the weight capacity is within a safe range. If the number is below the GCW rating, the size of the trailer is right for you, but if it is above the rating, you may want to consider a larger trailer.

Tongue Weight

Another factor to consider is tongue weight, which measures the weight on the hitch. Try to have the least amount of weight resting on the hitch as possible, as a high tongue weight could cause the joint to sway or negatively impact steering. The calculations may look different depending on whether you want a single or dual-axle trailer. You may have to purchase a tongue-weight scale for a dual-axle trailer.

Hitches

Besides finding your trailer’s proper weight capacity, ensure you have correctly sized hitch balls. The size should correspond to the trailer’s size and length. While smaller trailers may use a smaller hitch, a large trailer often needs a special hitch to fit the size, as an ill-fitting hitch ball may accidentally detach while driving.

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Big Tex Trailer World has one of the largest parts and accessories selections, allowing our company to offer excellent customer service and commitment to unmatched inventory. Contact us today to speak to a Big Tex representative, or call us at 888-885-1005.

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