FlowBelow Announces EPA SmartWay Certification for AeroSlider System
FlowBelow Aero announced that the U.S. Environmental Protection Agency has verified its new Trailer AeroSlider Stage 2 system for the EPA SmartWay program.

According to FlowBelow, its new Trailer AeroSlider represents a new category in trailer aerodynamics.
Photo: FlowBelow
Austin, TX – October 28, 2018 – FlowBelow Aero has announced at the American Trucking Associations Annual Meeting that the U.S. Environmental Protection Agency has verified its new Trailer AeroSlider™ Stage 2 system for the EPA SmartWay program.
According to the company, the Trailer AeroSlider represents a new category in trailer aerodynamics. Instead of attaching to the body of the trailer, the system is mounted directly to the sliding trailer suspension and travels with the suspension. The AeroSlider consists of multiple components including ‘quick-release’ wheel covers, fairings positioned between and behind the trailer wheels, and aerodynamic mud flaps behind them. From an aerodynamics standpoint, FlowBelow says, the fairings control the complex airflow around the trailer wheels and the wake behind the trailer. The system is designed to complement other trailer-mounted aerodynamic devices such as trailer skirts and tails and offers additive fuel savings depending on the combination of devices implemented.
The Trailer AeroSlider Stage 2 system was developed using computational fluid dynamics and rolling-floor wind tunnel testing. And, according to the company, the system was recently validated to provide up to a 2.07% fuel savings based on third party fuel economy testing conducted by MVT Solutions. The most recent test, which was done in accordance with EPA SmartWay test protocols, demonstrated a 1.93% fuel savings, which exceeds the minimum requirement for EPA SmartWay verification. According to FlowBelow, these tests confirmed an additional 0.70% fuel savings improvement over FlowBelow’s Stage 1 AeroSlider System.
“Based on our production costs and the positive fuel savings we’ve seen from extensive testing, we believe that the Trailer AeroSlider has the potential for achieving widespread adoption within 3-4 years.” said Josh Butler, CEO of FlowBelow Aero. “This approach seems to be the most practical way to address the aerodynamics of the trailer tandem without sacrificing durability or accessibility.”
More Equipment

Kodiak Lines Up Fleets for Driverless Trucking
An agreement for 75 trucks, a new Texas freight lane, and progress on safety validation move Kodiak closer to its planned driverless highway launch.
Read More →
How GP Transco Builds Fuel Savings a Fraction at a Time
Aerodynamic specs, solar panels, and driver incentives help GP Transco turn small efficiency gains into savings it can reinvest in its people.
Read More →
More Trailer Data Through the Same Seven-Way [Video]
Can trucking’s standard seven-way connector handle more cameras and trailer data? Grote’s Adam Slade shows HDT how the company is using new technology with its 4See trailer system, not only to add a new backup camera but also to expand other capabilities — without adding another connection.
Read More →
Grote: More Cameras, Same Seven-Way Connector
The next-generation 4See rear-view backup camera from Grote uses the standard seven-way connector and supports additional cameras and other trailer data.
Read More →
Trucks at ATA's 2026 MC&E in Charlotte, North Carolina [Photos]
From rigs decked out in patriotic America's 250 paint schemes to autonomous trucks and more, check out these photos from ATA's 2026 Management Conference & Exhibition.
Read More →
Help HDT Find Trucking’s Top Products
Have you come across a new product that could make a difference for trucking fleets? Nominate it for HDT’s 2027 Top 20 Products Awards by November 9.
Read More →
Volvo Unveils New VNX Heavy-Haul and Vocational Truck
Volvo Trucks has launched the VNX, a new vocational truck also available as a tractor in day cab and two sleeper configurations, with one heavy-haul model. The Volvo VNX is powered by Volvo's D13 platform, which delivers up to 540 horsepower and 1,950 pound-feet of torque and is EPA 2027-compliant.
Read More →How GP Transco Cuts Trucking Fuel Costs, a Tenth of a Gallon at a Time
What’s another tenth of a mile per gallon worth? GP Transco shares how equipment upgrades and driver coaching turn small gains into meaningful fuel savings.
Read More →
Electric Yard Tractors Move Beyond Pilots
Operating-cost savings have overtaken sustainability goals as the leading reason surveyed fleets are adopting battery-electric terminal tractors, according to new NACFE research.
Read More →
Continental Introduces New Regional Truck Tires
Continental says its new Generation 5 steer and drive tires for regional operations offer longer tread life, with estimated mileage gains of 22% and 19%, respectively.
Read More →
