Heavy Duty Trucking Logo
MenuMENU
SearchSEARCH

Transtex Adds Edge Fin to Boost CARB Drag Reduction Rating

Transtex said it now has the only commercially available California Air Resources Board pre-approved Bin V aerodynamic solution for heavy-duty trailers.

October 20, 2023
Transtex Adds Edge Fin to Boost CARB Drag Reduction Rating

Transtex's new Edge Fin, announced earlier this year, is now commerically available.

Photo: Transtex

3 min to read


Transtex announced that it now has the only commercially available California Air Resources Board pre-approved Bin V aerodynamic solution for heavy-duty trailers. The recent launch of the Edge Fin allowed Transtex’s kit, as a whole, to attain the Bin V rating, which according to Transtex is currently the highest level of trailer drag reduction in CARB's GHG regulations for trailers.

“After years of research, development, and testing of the Edge Fin device, Transtex has received CARB bin V preapproval for our Edge Elite Aero System+,” said Todd McGuire, senior vice president, sales and marketing, Transtex, during the recent American Trucking Associations management conference. “We are the only commercially available system that is Bin V certified. I don't have to tell you how important CARB preapproval is.”

Ad Loading...

The components of the Edge Elite Aero System+ are:

  • Edge Skirt — Built for fast and easy installation. Can withstand steep angled docks and is EPA Smartway verified, CARB compliant, and CARB GHG Phase 2 preapproved.

  • Edge Top Kit — Available for dry vans, reefers, and straight trucks with swing or rollup doors.

  • Edge Fin — Built with T-Flex Blue Brackets, covered by a 10-year limited warranty.

Transtex said key highlights of the Edge Elite Aero System+ include:

Ad Loading...
  • Warranty Coverage — The CARB BIN V certified Edge Elite Aero System+ includes a 10-year limited warranty on the Edge Skirt, the Edge TopKit, and the Edge Fin.

  • Enhanced Environmental Benefits — Transtex's CARB BIN V certified option minimizes nitrogen oxide emissions, supports cleaner air, and combats climate change.

  • Improved Fuel Efficiency — Transtex's certified option optimizes commercial vehicle aerodynamics, leading to improved fuel efficiency, lower carbon emissions, and reduced operating costs for fleet owners.

  • Regulatory Compliance — Transtex's CARB BIN V certification fully complies with the latest environmental regulations, giving customers peace of mind.

  • Sustainability Focus — Transtex uses eco-friendly materials and manufacturing processes.

Todd McGuire, senior vice president, sales and marketing, Transtex, announces the addition of the Edge Fin to complete Edge Elite Aero System+ and achieve CARB’s highest rating for trailer drag reduction.

Photo: Wayne Parham

Edge Fin

The Edge Fin, announced in March at ATA’s Technology & Maintenance Council Annual Meeting, is the newest addition to the Edge Elite Areo System+ and the component that drives the drag reduction numbers to the Bin V level. Although the new product was announced then, it has just now become commercially available, according to McGuire.

Earlier Components

The Edge Skirt was launched about 15 years ago, explained McGuire, who said it has wide acceptance by the trucking industry. Along the way, drag-reducing flaps were also made available for trailers.

Transtex added the next component, the Edge Top Kit, more recently.

“The innovation was to give a rear aero device that was CARB approved for trailers that, for whatever reason, did not have trailer skirts but still needed to run all 50 states. So, we did that four years ago and achieved Bin III from CARB,” explained McGuire.

Ad Loading...

“But with increasing regulations, and it looks like increasing CARB Bin levels we needed to be Bin V by January 2024,” he added, as he explained why the increased drag reduction provided by the Edge Fin is needed.

Installation and Maintenance

McGuire said installation of all components in the kit is easy, and maintenance is minimal.

Many of the trailer OEMs are now installing drag-reducing devices at the factory so when the drivers or fleets pick the trailers up, the aftermarket parts are in place and ready to go.

The Transtex system also can be installed by fleets to upgrade existing trailers. In such cases, Transtex provides the installation training.

McGuire also pointed out a third way trailers can be equipped with the kit, and that is through third-party installers that are already installing other aftermarket parts for fleets or drivers.

Ad Loading...

Really, no maintenance is needed, according to McGuire, other than having a tech from time to time check the fasters to make sure they are properly torqued.

“There’s really zero maintenance on all three devices,” he added. 

More Equipment

Video still of Volvo's Duane Tegels explaining the Volvo D13 diesel engine for EPA 2027 emissions
Equipmentby Deborah LockridgeSeptember 16, 2026

How Volvo Updated Its D13 for EPA 2027 [Watch]

Volvo’s updated D13 promises lower emissions without sacrificing performance or fuel economy. Take a closer look at what changed inside the engine in this HDT Spotlight video.

Read More →
Photo of new Michelin drive tire
Equipmentby News/Media ReleaseSeptember 15, 2026

Michelin Tire Improves Efficiency and Durability for Regional Fleets

The Michelin X Multi Energy D2 is a regional haul drive tire engineered to help fleets improve fuel efficiency, durability and traction in demanding stop-and-go operations.

Read More →
Presentation slide showing ZF's North American market growth
Equipmentby Deborah LockridgeSeptember 10, 2026

ZF Expands Commercial Vehicle Push in North America

ZF is expanding its North American commercial-vehicle presence with new transmission applications, electrification, trailer technology and autonomous-driving systems.

Read More →
Ad Loading...
Tesla Semi electric truck with interior of Tesla Cybercab superimposed on top
Equipmentby Deborah LockridgeSeptember 8, 2026

Tesla Wants a Self-Driving Semi. Are Cameras Enough?

Could Tesla’s camera-only autonomous driving technology work on an 80,000-pound Semi? In this commentary, HDT's Deborah Lockridge takes a look at Tesla, Cybercab, and how autonomous trucks see the road.

Read More →
Red highway tractor pulling white trailer with red logo identifying Kodiak.
Equipmentby News/Media ReleaseSeptember 8, 2026

Kodiak: Driverless Long-Haul Truck Launch on Track for 2026

Kodiak AI says its driverless long-haul safety case is 93% complete and it remains on track to begin commercial operations by year-end 2026.

Read More →
Collage of five autonomous trucks
Safety & Complianceby Deborah LockridgeSeptember 8, 2026

What DOT’s Automated Vehicle Strategy Means for Trucking

The U.S. Department of Transportation issued a new automated-vehicle strategy that outlines plans for driverless-truck regulations, cross-state freight corridors, and federal safety standards.

Read More →
Ad Loading...
Port of Newark EV truck charging station.
Equipmentby News/Media ReleaseSeptember 8, 2026

East Coast Port Launches $45M Electric Truck Push

The Port Authority of New York and New Jersey announced millions in incentives for zero-emission drayage trucks, yard tractors, and new charging hubs near the port.

Read More →
PlusAI autonomous truck with trailer going down a highway
Equipmentby StaffSeptember 3, 2026

PlusAI Going Public to Fund Autonomous Truck Launch

A SPAC deal could provide PlusAI with up to $300 million as it works toward a 2027 commercial launch of factory-built autonomous trucks.

Read More →
Faded sketch of diesel engines on a factory floor with NHTSA logo superimposed on top
Equipmentby Deborah LockridgeAugust 31, 2026

NHTSA Moves to Rewrite Truck Fuel-Economy Rules

The National Highway Traffic Safety Administration says it lacks authority to regulate medium- and heavy-duty truck engines separately from complete vehicles, but the existing standards have not yet been eliminated.

Read More →
Ad Loading...
Illustration of Freightliner Cascadia on highway with engine cutaway
Equipmentby Deborah LockridgeAugust 27, 2026

Detroit Opens Orders for EPA 2027 Engines

Detroit isn’t starting from scratch to meet EPA 2027 diesel emissions standards. Its Gen 6 DD13 and DD15 engines keep much of today’s platform while updating the fuel and aftertreatment systems.

Read More →