Trailer Tails For Truck Trailers,

What You Need To Know!

Aerodynamic Trucking Technology That Lowers Your Fuel Costs

Truck Trailer Tails Are one option to reduce your operating costs

We are an official source for all your truck trailer aerodynamic systems. Let us speed up your next delivery cross country! With products like side panels, rear-end tail fairings, and front-end fairings, our designs have shaped the flow of fuel efficiency for many leading semi-truck fleet owners. Our job is to reduce drag and save on cost for every tracked mile.

What Are Trailer Tails?

No matter where you drive these days, it’s becoming increasingly more common to see trailer tail fairings. You probably didn’t notice the last time you looked!

Trailer tails often referred to as trailer fairing, are panels that are affixed to the rear end of the trailer on all sides of the truck trailer loading door. The fairings are affixed to the trailer along the back of the trailer and rear axles. The idea is to fill the gap and reduce air turbulence behind the trailer. They are often made of hard plastic, aluminum or fiberglass materials to ensure the durability of time and exposure to road conditions.

How Trailer Tail Fairings Work

How to Improve Semi-Truck Fuel Efficiency

Truck trailers are best known to improve the speed performance of any semi-truck trailer by limiting the drag of aerodynamics. Fuel efficiency is the biggest reason as to why truck drivers continue using this product for every haul they make. When a truck trailer tail is installed onto a semi-truck trailer, it provides a wind control at the end of the tail of the trailer. You can find a variety of truck trailer tail panels that fit on to different types of trailers. Truck drivers will find that they will be able to get an efficiency of 5%-15% fuel efficiency. The drag reduction and fuel efficiency will both increase the constant speed when driving on long roads or highways for extended periods of time.

Why Tail Fairings Work on Trucks Trailers!

If you notice while driving, you will find semi-trucks hauling trailers will panels that hang off the back end of the trailer. These trailer panels are called rear tail fairings, or trailer tails. You can find they serve a purpose of reducing drag and saving fuel. Aerodynamic devices intend to improve the fuel economy of semi-trailer trucks. The set of panels are usually comprised of collapsible fairings that are adjusted to fit the trailer. They can come preinstalled on a truck trailer or are purchased separately and fitted onto the trailer. The reduction of airflow from truck rear end fairings is to help stabilize trailers and to reduce the gravel kickback on the road. The trailer fairings should provide the tested results of each product sold! We always aim to provide independently tested results that evaluate the safety requirements of the fairings. Your truck trailer fairings are made to last! With our concern for safe and improved performance, you will see that we design our panels to function based on result testing, visibility and injury prevention during rear-end collisions or upon setup!

Trailer Skirts Help Fuel Efficiency & Compliance

Like any business, the trucking industry looks at both fixed and variable costs. The cost of fuel is one of those variable costs that can make or break your bottom line. Installing aerodynamic technology on your trailers helps you improve your fuel efficiency as well as maintain compliance- especially in California. Imagine saving nearly 10% on your fuel costs. For most transportation-related companies, deciding on installing something like trailer tails or other forms of aerodynamic technology is an easy decision to make.

How Do You Unload A Truck Trailer with Trailer Tail Fairings?

Smart Truck Aerodynamic Systems has tackled the long-standing trailer unload issue during the use of truck fairings on a trailer. Our branding and design were created specifically with this term in mind. Our trailer tail fairings are built to collapse and expand during unload times. Now any truck driver can back into a port dock without any cause for concern. Applying our vast expertise to the trucking industry, we’re imagining, designing and testing revolutionary new concepts in trailer aerodynamics. We utilize many of the same development and testing techniques used by the aerospace industry.

Where to buy truck trailer fairings?

If truck trailer fairings are as important as we say they are, why wouldn’t every truck have them? In the case of aerodynamic trucking products, lots of research and development are invested in new product designs and features. It can all depend on the value you seek as an owner-operator, most owners are semi-truck fleet owners, so you will find them making purchases in bulk rather than per unit. This can be a great discounted advantage for the owner’s case. Even if a semi-truck owner were to purchase just one truck trailer tail fairing unit, it would eventually pay for itself over the long-term usage. Most people will find they are able to save on fuel energy consumption, they see their trailer fairings as more of a return on investment instead of a lost value. When undertaking truck driving services, it is best to think long-term. The overall return you can make per trip is just as important as getting from point A to point B.

History of Truck Trailer Tail Fairings

As far back as trucking goes, drivers have been seeking the fastest way to get from a starting point to a finish point. This focus on speed has brought trials and tribulations for many long-distance cross-country truck drivers. Over the years innovative was finally reached thanks to inventors and experienced drivers across the world. Both inventors and truck owner-operators sacrifice their service to improve the logistical accomplishments of today. We have compiled many use case scenarios to prevent past experiences. Most of the heavy trucking aerodynamic drag reduction has been discovered through experimental testing and analysis. The trucking industry is undergoing immense transformations. As we turn to the leaders of the industry we find them using aerodynamic reduction to save on expenses that could take away from much-needed profits! We believe that the trucking industry was shaken some time ago due to the crisis of oil/gas prices increasing as well as the concern of environmental impacts that trucking can leave behind.

Trailer Tails

What Are These Panels Called, And What’s Their Purpose?

Panels that are attached to the rear-end of a truck trailer are called aerodynamic panels or tails fairings. These panel fairings are usually augmented to the back of the rear of a truck cargo trailer. The tail fairings serve the purpose of reducing drag as the panels are made to allow wind drafts to be controlled in the rear portion of the moving vehicle.

Alternatives To Side Skirts & Trailer Tails

At Smart Truck Precision Aerodynamics, we have studied trucks and trailers. Our engineers have done their homework to provide the transportation industry with in alternatives to side skirts. We sell a variety of products that help incrementally reduce your fuel costs even more than traditional trailer skirts.

SmartTruck engineers have utilized the expertise of both CD-Adapco along with the University of Tennessee SIMCENTER to verify the performance of our aerodynamic products. Not only did they validate and approve of our aerodynamic systems, but as mentioned, our TopKit Fairing System was named a HDT Top 20 product for both 2015 and 2017. This means our aero systems have third party validation, so you can trust them to help save your operating costs.

Our Aerodynamic Products

We have a variety of aero systems you can select from in order to make your trailer more fuel-efficient. Here are the systems and the specs below:


Our most powerful aerodynamic system.

SmartTruck Premier Aero System

Our most powerful and advanced aerodynamic system that can deliver up to a 10% improvement in fuel economy. This is a complete system that catches the attention of most of the mid-sized to larger trucking companies. We install a variety of aerodynamic products on both the truck and the trailer- each system builds in more fuel savings. This durable system is EPA Smartway Verified and C.A.R.B compliant. While side skirts are helpful, this is one of the most comprehensive systems on the market to help you save diesel costs.

This system includes several features starting with the Aero Rain Guard which compresses and redirects airflow on the trailer roof to the rear corner and down into a low energy wake. We also install the Forward UnderTray which captures air and directs it below the suspension system. We provide two side fairings on the back of the trailer that redirect airflow around the back of the rig into the low energy wake. On top of these elements, we provide a limited lifetime warranty for these products.

At SmartTruck, we have the Premier LE and the Premier. The difference is that with the LE, you also get the Leadedge Top Fairing kit which is installed on the top of the trailer to close the gap of airflow between the trailer and the truck or between two tandem trailers.

None of the elements we install require any driver interaction. These systems are truly “set it and forget it”. Also, they never interfere with loading, visibility or loading docks. Because they’re so durable, they often last for years with no maintenance required.

SmartTruck Classic 

Our most economical undertray aerodynamic system for improved fuel efficiency



The classic aerodynamic system has a couple of the same features as the Premier. We install the forward undertray which captures air and directs it below the suspension. This system also includes the Aero Rain Guard mentioned above. The estimated fuel savings with just these two systems is estimated to be about 2%-6% which can really save you money over the long haul.





Forward UnderTray and Integrated Sled – Captures air and directs it below suspension.

Diffuser – Accelerates and injects air into low-energy wake behind the trailer.

Aero Rain Guard – Redirect high-energy airflow from roof down into wake.

Side Fairings (2) – Redirect high-energy airflow around back corners into low-energy wake.

SmartTruck TopKit

The smart alternative to side skirts

Named as an HDT Top 20 Product for two years and as recently as 2017, our TopKit Aero System is an innovative way to reduce drag without anything else. This system involves installing panels on the back of the trailer to redirect airflow. The cost of this system is comparable to side skirts and can help you save anywhere from 4%-6% in diesel costs.



  • Aero Rain Guard – Redirect high-energy airflow from roof down into wake.
  • Side Fairings (2) – Redirect high-energy airflow around back corners into low-energy wake.

SmartTruck LeadEdge Top Fairing

Closing the gap for better fuel efficiency

This aero system can save you anywhere from 1% to 3% in fuel by itself. It’s a durable component that has no effect on visibility or requires no maintenance. Installation time takes less than an hour, and we offer a limited lifetime warranty.



LeadEdge Top Fairing

Fleet Owners, Owner Operators & More

When considering an investment in aerodynamic technology for your truck or trailer, it’s important to weight out all the alternatives. Side skirts have been well adopted throughout the transportation industry, but now, there are alternatives to trailer skirts. In fact, there are entire systems you can implement- individually or as a complete system. These systems are environmentally friendly and add more money to your bottom line.

If you’re ready to start saving money on your diesel costs, be sure to talk to the professionals at SmartTruck. Consider all the options and we think you’ll make a decision to implement one of our aero systems. It could be one of the smartest decisions you could make. Don’t just settle with side skirts. Implement a system that pays for itself. Call SmartTruck today.


(888) 320-5970 (US)

(204) 229-7330 (Canada)

(888) 320-5906 (Technical Support)

Smart Truck Service Area

We Service National and Regional Locations | Call Us Today! | United States of America : (888) 320-5970 or Canada: (204) 229-7330