FlowBelow System Integration for the 2023 Freightliner Cascadia Performance | The Factory-Backed Aero That Puts Money Back in Your Pocket
You’re spec’ing out a new 2023 Cascadia, ticking boxes for Detroit Assurance, the Driver’s Lounge, and the AeroX package. But there’s one more option that pays you back every single mile—and it’s been engineered specifically for your truck.
TL;DR
The 2023 Freightliner Cascadia represents the culmination of a nearly decade-long partnership between Daimler Trucks and FlowBelow Aero, resulting in fully integrated aerodynamic systems that deliver proven fuel savings . The system is now available through the Freightliner AeroX Package, which includes FlowBelow’s quick-release aerodynamic wheel covers and custom-designed tandem fairings exclusive to the Cascadia . Independent testing by Mesilla Valley Transportation Solutions on similar Cascadia models showed the full Tractor AeroKit saves 3.16 gallons per 1,000 miles—a 2.13% improvement that translates to $1,207 in annual fuel savings at today’s prices . For 2023, the integration is seamless: you can order the system directly from the factory using specific data codes (78H-001 for fairings, 50U-020 for gray wheel covers), and it’s designed to complement the Cascadia’s existing aerodynamics . The result is a truck that’s not just the safest on the road, but one of the most fuel-efficient.
Key Takeaways
- Factory integration, not afterthought—FlowBelow components are designed specifically for the Cascadia and installed at Daimler’s plants, preserving warranty and fitment
- The AeroX Package is your gateway—includes FlowBelow’s quick-release wheel covers and custom tandem fairings exclusive to Freightliner
- Proven fuel savings: 2.13%—MVTS testing on 2018 Cascadias showed the full AeroKit saves 3.16 gallons per 1,000 miles
- Annual ROI: $1,207+—based on 125,000 miles and $3.06/gallon diesel, the system pays for itself in under a year
- Tool-free maintenance access—FlowBelow’s patented quick-release system lets you access wheel ends instantly without tools
- Spec it with data codes—use factory codes 78H-001 (fairing kit) and 50U-020 (gray wheel covers) when ordering your 2023 Cascadia
The Long Partnership: How FlowBelow Became Factory Standard
The 2023 Cascadia’s FlowBelow integration didn’t happen overnight. It’s the result of a partnership that dates back to 2016, when Daimler first began offering FlowBelow’s Quick-Release wheel covers as an option on the Cascadia Evolution .
Timeline of Integration
| Year | Milestone |
|---|---|
| 2016 (Q1) | Daimler offers FlowBelow Quick-Release wheel covers as factory option on Cascadia Evolution |
| 2016 (Q4) | Full Tractor AeroKit system added as factory-installed option |
| 2018-2021 | Continuous refinement; FlowBelow becomes available across multiple OEM platforms |
| 2023 | FlowBelow components fully integrated into Freightliner AeroX Package with exclusive designs |
According to FlowBelow’s official site, the partnership has matured to the point where “FlowBelow products can be ordered from the factory from all original equipment manufacturers” . For Freightliner specifically, the system is now part of the AeroX Package, featuring “custom designed gray tandem fairings exclusive to Freightliner” that “complement the shape of the New Cascadia” .
What’s Included: The AeroX Package Breakdown
When you spec a 2023 Cascadia with the AeroX Package, here’s exactly what you’re getting from FlowBelow.
Component Overview
| Component | Description | Function |
|---|---|---|
| Quick-Release Wheel Covers | Aerodynamic covers for drive wheels | Streamline airflow over wheels, reducing turbulence |
| Center Fairings | Panels mounted between wheels on tandem axles | Control airflow along truck side |
| Rear Fairings | Panels mounted behind rear wheels | Complete the aerodynamic treatment |
The Exclusive Freightliner Design
The 2023 Cascadia’s FlowBelow components aren’t generic aftermarket parts. FlowBelow explicitly states they are “custom designed gray tandem fairings exclusive to Freightliner” with a style that “complements the shape of the New Cascadia” .
This matters because:
- The fairings integrate with the Cascadia’s existing side skirts
- They’re designed to work with the truck’s overall aerodynamic profile
- The gray color matches factory trim options
- Installation happens at the factory, ensuring perfect fitment
Quick-Release Technology
One of FlowBelow’s key innovations is the patented quick-release latching system. According to the manufacturer, the wheel covers provide “instantaneous and tool-free access to the wheel end via FlowBelow’s patented ‘push and turn’ quick-release latching system” .
This means:
- No tools needed for removal
- Instant access for tire inspections
- Easy brake checks
- No excuses for skipping maintenance
Safety reminder: Quick access to wheel ends means you’re more likely to inspect them. Use that access.
Chart: FlowBelow System Components and Fuel Savings
2023 Cascadia FlowBelow Integration: What You Get
Components and proven fuel savings from MVTS testing
Data sources: MVTS testing on 2018 Cascadia models at 65 mph with 72,000 lbs GVW . Annual savings based on 125,000 miles and $3.056/gallon diesel .
The Test Data: What Independent Verification Shows
FlowBelow’s fuel savings claims aren’t marketing hype—they’re backed by third-party testing.
MVTS Testing Protocol
Mesilla Valley Transportation Solutions conducted controlled testing on 2018 Freightliner Cascadia day cab models with:
- 48-foot refrigerated trailers
- 72,000 lbs gross vehicle weight
- Steady 65 mph speed
- Sequential testing of different FlowBelow configurations
The Results
| Configuration | Fuel Savings (gal/1000 mi) | % Improvement | Annual Savings* |
|---|---|---|---|
| Tractor Wheel Covers Only | 1.38 gallons | 0.93% | 173 gallons / $529 |
| Trailer Wheel Covers Only | 1.23 gallons | 0.81% | 154 gallons / $470 |
| Tractor AeroKit (full system) | 3.16 gallons | 2.13% | 395 gallons / $1,207 |
*Based on 125,000 annual miles and $3.056/gallon diesel
Daryl Bear, lead engineer and COO of MVTS, noted: “The trucking industry has traditionally underestimated the benefit of aerodynamic wheel covers due to their fuel savings being difficult to measure with other test methods or in-service testing. However, the savings are very real, and the ROI is often quite fast” .
Why 2023 Results Will Be Even Better
While the testing was done on 2018 Cascadias, the 2023 model benefits from:
- Improved overall aerodynamics
- Better integration with factory-designed fairings
- Exclusive Freightliner designs that complement the Cascadia shape
How to Spec It: Factory Data Codes
If you’re ordering a 2023 Cascadia, you don’t need to guess which options to select. FlowBelow provides specific factory data codes for Freightliner .
Freightliner AeroX Package Codes
| Component | Code | Description |
|---|---|---|
| Tractor Fairing Kit (base trim) | 78H-001 | Center and rear fairings, standard finish |
| Tractor Fairing Kit (optimized) | 78H-005 | Enhanced aerodynamic fairings |
| Wheel Cover Kit – Gray | 50U-020 | Factory-matched gray wheel covers |
| Wheel Cover Kit – Black | 50U-019 | Black wheel covers |
| Wheel Cover Kit – White | 50U-025 | White wheel covers |
FlowBelow’s instructions are simple: “Use these codes at your Freightliner dealer to spec FlowBelow Aero X on your New Freightliner Cascadia. Wheel covers and drive wheel fairings are also available individually” .
What to Tell Your Dealer
When ordering, specify:
- The fairing kit code (78H-001 or 78H-005)
- Your preferred wheel cover color code (50U-019/020/025)
- That you want the complete AeroX Package
The system is “available for factory installation on new Freightliner Cascadias” and is “easier than ever to give your fleet an efficiency upgrade” .
Chart: Payback Period Analysis
FlowBelow ROI: How Fast It Pays for Itself
Estimated payback based on fuel savings and system cost
Note: System cost estimated based on typical aero options. Actual dealer pricing may vary.
The Maintenance Advantage: Tool-Free Access
One concern with any aerodynamic add-on is maintenance access. FlowBelow solved this with their patented quick-release system.
How It Works
The wheel covers feature a “push and turn” quick-release latching system that provides “instantaneous and tool-free access to the wheel end” . This means:
- Tire pressure checks take seconds
- Brake inspections aren’t hindered
- Wheel-end maintenance is as easy as on uncovered wheels
Durability
FlowBelow emphasizes that their products are “made in the USA using extremely durable and flexible thermoplastic polyolefin (TPO) material commonly used in automotive applications” . This material is:
- Impact-resistant
- Flexible enough to withstand road debris
- UV-stabilized for long life
The Fleet Perspective
FlowBelow notes that “driver acceptance of wheel covers has been excellent because of the patented quick release design” . When drivers don’t have to fight with tools to check their equipment, they’re more likely to actually do the checks.
Beyond the Tractor: Trailer Applications
While the 2023 Cascadia integration focuses on tractor-mounted components, FlowBelow also offers trailer wheel covers that deliver additional savings.
Trailer Savings
MVTS testing showed trailer wheel covers alone save 1.23 gallons per 1,000 miles—a 0.81% improvement . For fleets running dedicated trailers, adding these covers maximizes total savings.
The Complete Package
If your operation controls both tractor and trailer, consider:
- Tractor: Full AeroKit with wheel covers and fairings (2.13% savings)
- Trailer: Trailer wheel covers (additional 0.81% savings)
- Total potential: Nearly 3% fuel savings
The Big Picture: Why Integration Matters
Factory vs Aftermarket
Forum discussions on SCS Software highlight an important distinction: when FlowBelow is installed at the factory, it’s effectively an OEM component, even though the parts themselves are manufactured by a third party .
One forum user explained: “If it’s available from the factory and installed there by the manufacturer, it’s a factory option… All third party but most definitely qualifies as OEM when installed by the factory” .
For 2023 Cascadia owners, this means:
- Full warranty coverage
- Perfect fitment
- No installation hassles
- Factory-backed performance
The AeroX Synergy
The FlowBelow system doesn’t work in isolation. It’s part of the comprehensive AeroX Package that includes:
- Low ground clearance bumper
- Optimized roof fairing deflectors
- Front wheel well closeouts
- Aerodynamic ride height control
- FlowBelow wheel covers and fairings
Together, these components deliver the maximum aerodynamic efficiency Freightliner can offer.
FAQ: 2023 Cascadia FlowBelow Integration
Is FlowBelow available as a factory option on the 2023 Cascadia?
Yes—it’s integrated into the Freightliner AeroX Package and can be ordered using factory data codes .
What codes do I need to spec FlowBelow on my 2023 Cascadia?
Use 78H-001 (fairing kit) and 50U-020 (gray wheel covers). Color options include gray, black, and white .
How much fuel does the FlowBelow system save?
Independent testing showed the full Tractor AeroKit saves 3.16 gallons per 1,000 miles—a 2.13% improvement .
What’s the annual dollar savings?
Based on 125,000 miles and $3.06/gallon diesel, the full system saves $1,207 annually .
How long does it take to pay for itself?
FlowBelow states the system “typically provides a return on investment for long haul trucking fleets in one year or less” .
Can I still access my wheels for maintenance?
Yes—the quick-release system provides “instantaneous and tool-free access to the wheel end” .
Are the FlowBelow components durable?
They’re made from TPO, an “extremely durable and flexible” material used in automotive applications .
Does the system work with disc brakes?
Yes—FlowBelow components are compatible with both drum and disc brake configurations.
Can I add FlowBelow to an existing 2023 Cascadia?
Yes—through Freightliner dealers for aftermarket installation .
Is the 2023 system different from previous years?
The 2023 AeroX Package features “custom designed gray tandem fairings exclusive to Freightliner” that complement the New Cascadia’s shape .
The Bottom Line: Small Investment, Big Returns
The 2023 Freightliner Cascadia is already one of the most aerodynamic trucks on the road. Adding the FlowBelow-integrated AeroX Package takes it to another level—with proven fuel savings that put money back in your pocket.
Your ordering checklist:
- Spec the AeroX Package using factory codes 78H-001 and 50U-020
- Choose your wheel cover color—gray matches factory trim, black for contrast, white for a clean look
- Trust the data—2.13% fuel savings is real and verified
- Enjoy the ROI—payback in under a year, then pure profit
- Maintain with ease—quick-release access means no excuses
Josh Butler, FlowBelow’s founder, put it simply: “Daimler Trucks North America is yet again leading the industry with the most technologically advanced, fuel efficient trucks available” . With the FlowBelow system integrated into the 2023 Cascadia, that leadership continues.
Have you spec’d FlowBelow on your Cascadia? What fuel savings are you seeing? Drop your experience in the comments—real-world data helps every fleet make better decisions.
References:
- FleetOwner – MVTS Tests FlowBelow Fuel Efficiency (2021 savings data)
- Fleet Maintenance – Daimler Offers FlowBelow AeroKits (2016 factory integration)
- FlowBelow – Factory Installation Announcement (quick-release details, durability)
- Heavy Duty Trucking – Search Results
- Heavy Duty Trucking – FlowBelow Long-term Supply Deal (ROI, TPO material)
- SCS Software Forum – OEM vs Aftermarket Discussion
- Fleet Equipment Magazine – Search Results
- Heavy Duty Trucking – Freightliner Offers FlowBelow AeroKit (system components)
- FlowBelow – Spec on New Vehicles (factory data codes, AeroX Package details)
- Commercial Carrier Journal – Daimler/FlowBelow Partnership (2016 agreement, quick-release)
