FlowBelow’s New Trailer AeroSlider Cuts Fuel Use by 3 Gallons for Every 1,000 Miles

Next-generation trailer aerodynamic system installs in less than 45 minutes and 
can pay for itself in less than 12 months.

CHARLOTTE, N.C., Oct. 19, 2026 /PRNewswire/ — FlowBelow Aero, Inc., a leader in tractor-trailer aerodynamics, today introduced its redesigned Trailer AeroSlider System, an aerodynamic solution that saves 3.0 gallons of fuel per 1,000 miles traveled. The company introduced the system at the American Trucking Associations’ Management Conference & Exhibition, Oct. 17-20, 2026, in Charlotte, N.C.

The launch comes as fleets contend with near record-high diesel prices. The national average on-highway diesel price was $6.179 a gallon on Oct. 12, according to the U.S. Energy Information Administration, after reaching a record $6.529 on Sept. 21. At $6.18 a gallon, the AeroSlider delivers approximately $18.54 in fuel savings for every 1,000 miles a trailer travels.

How It Works
The Trailer AeroSlider targets one of the most aerodynamically complex areas of a tractor-trailer: the exposed wheels, suspension, and underbody surrounding the trailer tandem. The system combines FlowBelow trailer wheel covers, flow-through mud flaps and optimized rear fairings.

Rather than simply shielding components from airflow, the rear fairings direct air leaving the tandem slightly outward and rearward. This dilutes the trailer wake and reduces turbulence around the wheels and suspension.

Because the system mounts to and travels with the sliding suspension, it continues to deliver fuel savings as fleets reposition the tandem for different loads and axle-weight requirements.

Redesigned for Simplicity and Durability
FlowBelow first introduced the AeroSlider in 2017. The redesigned system delivers even greater fuel savings with a single fairing than the previous design achieved with separate center and rear fairings. The result is a smaller, more durable package that costs less, installs faster and fits virtually any make or model of dry van or reefer trailer.

The complete system weighs less than 30 pounds and can be installed on existing trailers in less than 45 minutes. Once installed, it requires no driver involvement.

Independently Tested Fuel Savings
FlowBelow optimized the system through computational fluid dynamics (CFD) modeling, wind-tunnel testing and track testing.

In June 2026, MVT Solutions conducted independent fuel economy testing using 2019 International LT tractors pulling loaded 53-foot dry van trailers. The baseline test configuration included side skirts and trailer wheel covers. Adding the AeroSlider’s rear fairings and flow-through mud flaps saved 1.77 gallons of fuel per 1,000 miles compared to baseline.

In separate testing, MVT Solutions verified fuel savings of 1.23 gallons per 1,000 miles from FlowBelow trailer wheel covers.  Combined, these independently measured improvements represent total potential fuel savings of 3.0 gallons per 1,000 miles. 

Designed Around Fleet ROI
“Our goal with the AeroSlider was to develop an aerodynamic system that could pay for itself in less than 18 months for a typical regional or long-haul fleet at $3.00 per gallon diesel,” said Josh Butler, president and chief technology officer of FlowBelow. “At today’s fuel prices, payback can be less than 12 months, even for fleets whose trailers travel as little as 30,000 miles per year.”

Butler added, “Certain aerodynamic products such as trailer side skirts deliver exceptional fuel savings for the cost incurred, which has helped them to achieve widespread adoption.  We believe the AeroSlider has the potential to become the next practical step fleets can take to reduce trailer drag without adding meaningful weight, maintenance, or driver involvement.”

Availability
The Trailer AeroSlider is available directly from FlowBelow for retrofit installation and can be specified on new trailers through participating trailer manufacturers.

For more information, high-resolution product images and the full MVT Solutions test report, please visit https://www.flowbelow.com/aeroslider-presskit.

About FlowBelow
FlowBelow is a Texas-based aerodynamics company founded by engineers. Its product development process combines advanced aerodynamics research with extensive collaboration with fleet mechanics and drivers to develop practical solutions that improve efficiency and profitability. FlowBelow’s products are manufactured in the United States, with fuel savings verified through independent third-party fuel economy testing. For more information, please visit http://www.flowbelow.com.

FlowBelow and Trailer AeroSlider are registered trademarks of FlowBelow Aero, Inc.

SOURCE FlowBelow Aero, Inc.