Related: Aerodynamic Devices Can Translate Into Fast Fuel Savings
XStream Offers Speed-Sensitive Trailer Gap Aerodynamic Device
XStream Trucking says its new, speed-sensitive, TruckWings trailer gap aerodynamic system can deliver fuel savings while reducing emissions.

XStream Trucking says that in addition to fuel savings, drivers report a much smoother ride in crosswinds with its TruckWing trailer gap device deployed. Photo: XStream Trucking

XStream Trucking has introduced TruckWings, which it calls an “active-aero device” that automatically deploys at highway speeds to deliver streamlined aerodynamics, fuel savings, and lower carbon emissions.
According to Daniel Burrows, the company’s founder and CEO, TruckWings features a patented design, that has been developed through years of wind tunnel, track, and road testing and is designed to work at highway speeds. The system automatically deploys large panels to cover the sides and top of the tractor-trailer gap. The panels, which are made of high-impact, glass-reinforced composites, create a continuous connection between the truck and trailer that allows the air to flow smoothly over the entire length of the truck. When the truck slows down, the panels retract without driver intervention, providing the necessary clearance for turns at any angle.
“There have been significant investments made in improving truck aerodynamics in other areas,” Burrows said. “TruckWings is the first device which completely solves the turbulence problem created by the open area between the tractor and trailer that contributes significantly to a truck’s overall aerodynamic drag. Since two-thirds of a truck’s fuel bill is spent overcoming that drag, there is a huge savings to be had by reducing it.”
"The exciting thing about TruckWings is that it is the first solution to automatically and completely enclose the sides and top of the tractor-trailer gap,” said Mike Roeth, Executive Director of the North American Council for Freight Efficiency, NACFE. “This gap area presents as much as a 5% opportunity with little to no other solutions available for truckers today. We performed their first independent on-road fuel economy test in 2016 and XStream has always taken a very customer led, data-driven product development approach."
“We see TruckWings performing particularly well on routes with high winds. Crosswinds push a wedge of air flow into the gap area, hitting the front of the trailer direct on. TruckWings cleanly prevent this buffeting and this is where we see our highest fuel savings.” said Burrows, “Drivers feel the improvement in windy conditions and report much smoother rides with less lane drift.”
Burrows said the company is offering several options for truck and fleet owners interested in adding TruckWings to their tractors, including a shared-savings model and outright purchasing.
More Fuel Smarts

New Agentic Predictive Maintenance Report Demonstrates How Degraded Aftertreatment Systems Waste Fuel
Questar analyzed a large mixed-class fleet and discovered it was wasting as much as $30 in fuel per vehicle, per day, because of mechanically degraded aftertreatment systems.
Read More →
New York City's Microhub Project is Delivering Results
Trucking, last-mile delivery companies, and environmental advocates like what they are seeing so far with New York's microhub program.
Read More →
Lessons Learned About Alternative Fuels: Start Small, Stay Flexible
Practical advice on adopting alternative fuels and ZEVs from HDT's 2026 Top Green Fleets, from renewable diesel and natural gas to electric trucks.
Read More →
Kempower Adds Flex EV Charger to Help Support Transition to Megawatt Charging
The Kempower Mega Satellite Flex has both a CCS and MCS connector, allowing operators to serve both types of heavy-duty vehicles.
Read More →
Hino Adds Electric Class 6/7 Truck
Hino says the Le Series is an important step in the company's efforts to reduce environmental impact and support its customers’ sustainability goals.
Read More →
Can Multi-Speed EV Transmissions Solve Heavy Trucking’s Biggest Electric-Vehicle Problems?
A startup called Sigma Powertrain believes purpose-built multi-speed gearboxes can boost efficiency, reduce battery size and improve gradeability for heavy-duty battery-electric trucks.
Read More →
Hendrickson Debuts Electraax E-Axle for Medium-Duty Trucks
Developed with Driventic, Hendrickson's new integrated e-axle is designed to improve efficiency, reduce weight, and extend range in Class 6-7 EV applications.
Read More →
50 Ways Fleets Can Cut Fuel Costs Now — Without Buying New Trucks
Fuel savings don’t come from one big change. They come from dozens of small ones. Here’s how leading fleets are stacking gains across drivers, routing, maintenance, and more.
Read More →
Top Green Fleets 2026: How Fleets Are Reducing Emissions in the Real World
What works in sustainable trucking today? Heavy Duty Trucking's Top Green Fleets are finding practical ways to cut fuel use, reduce emissions, and keep freight moving.
Read More →
California Launching $1 Billion Electric Truck Rebate Program
CARB says the California Clean Fuel Reward program will begin offering point-of-sale rebates of up to $120,000 for electric commercial trucks starting June 26.
Read More →
