Dually or Not: Pulling a Fifth Wheel Trailer

When considering a tow vehicle for your fifth wheel trailer, one of the questions that may arise is: Do I need a dually to pull a fifth wheel? Here, we'll delve into the intricacies of this setup to help you make an informed decision.

Fifth wheel trailers are no lightweight. They can weigh anywhere between 5,000 to 15,000 pounds or more when fully loaded. That's why it's crucial to choose a tow vehicle that can handle the load safely and efficiently. This is where dual rear wheels (doubles or dualies) come into play.

Understanding the Requirement for Gross Combined Weight Rating (GCWR)

The Gross Combined Weight Rating (GCWR) is the maximum weight of your tow vehicle plus your trailer, combined. To find out if your truck needs duallys for towing a fifth wheel trailer, start by calculating your GCWR.

For instance, if your trailer weighs 10,000 pounds and you want to stay within a 20% safety margin, you'd need a tow vehicle rated for a GCWR of at least 12,000 pounds. Keep in mind that fifth wheels also exert a significant hitch weight, typically around 15%-20% of the trailer's total weight, which also needs to be accounted for.

Single Rear Wheel vs Dually: The Strength Factor

Whether you need a dually or not depends on your truck's Gross Axle Weight Rating (GAWR). Single rear wheel (SRW) trucks have a higher payload capacity than their dually counterparts, but the latter offers more stability under heavy loads.

Trucks with a GAWR closer to the maximum load of your fifth wheel might require duallys for extra stability and to prevent exceeding the truck's capacity. Dually tires also offer better traction and can handle longer loads better than SRWs.

Road Conditions and Trailer Size

If you frequently tow your fifth wheel through adverse road conditions or over long distances, opting for a dually might offer greater control and safety. Duallys can handle uneven weight distribution more effectively, reducing the risk of tire blowouts or suspension damage.

Moreover, if you're towing a large fifth wheel, the additional support and stability provided by a dually can make your journey smoother and more secure.

The Trade-offs: Duallys vs Single Rear Wheels

Duallys aren't without their drawbacks. They often come with higher purchase and maintenance costs. A vehicle with duallys will also have a wider turning radius, which might prove challenging in tight spaces.

On the other hand, SRW trucks have better maneuverability and fuel efficiency. They also typically have a higher payload capacity, making them ideal for lighter fifth wheel trailers.

-ball Weight: Don't Overlook the Hitch Weight

Hitch weight, or ball weight, is the downward pressure exerted by your trailer at the hitch point. It's crucial to consider this when calculating your truck's GCWR. If the hitch weight exceeds your truck's rear axle capacity, you might need duallys for improved stability.

Fifth wheel hitch weights can range between 1,500 to 3,000 pounds. If you're close to or exceeding your truck's rear axle capacity with the hitch weight alone, upgrading to a dually could be necessary.

investment vs Expectations: What's Right for You?

Ultimately, the decision to go with a dually or SRW truck depends on your specific needs, budget, and expectations. If you're looking for a more robust, stable tow vehicle for larger fifth wheel trailers or frequently travel through rough terrain, a dually could be the better choice.

However, if you prioritize better fuel efficiency, lower maintenance costs, and better maneuverability for your lighter fifth wheel trailer, an SRW truck might be more suitable.

When in doubt, always consult with your local dealership or a professional mechanic who can help you assess your specific needs and make the right choice for your fifth wheel adventures.