How HALODISC 2 Wheel Covers Optimize Vehicle Aerodynamics
Wheel covers are not just decorative accessories; they are a key component in optimizing vehicle aerodynamics. By reducing tire-area turbulence, lowering the drag coefficient (Cd), and enhancing stability at high speeds, wheel covers significantly improve overall performance — especially for electric vehicles.
Improving Aerodynamic Efficiency | Reducing Drag Coefficient
Improved Efficiency
Aerodynamic optimization with wheel covers increases efficiency by 1%–3% on regular vehicles, and even more on EVs.
Extended Range
HALODISC 2 reduces drag by up to 10%. Even a small reduction of 0.01 in the drag coefficient (Cd) can noticeably extend the driving range, allowing for longer trips on a single charge.
Smoother Ride
The design minimizes flow separation and vortex formation, resulting in a quieter, more stable driving experience.
Subtle Innovation, Big Impact
HALODISC 2 is not just about aesthetics — it transforms efficiency, stability, and range, enabling your vehicle to reach its full potential.
See the Difference at a Glance
HALODISC 2 smooths airflow around the wheel wells and tightens the wake behind the vehicle for improved highway efficiency.
- Fewer wheel-well vortices → cleaner side flow
- Tighter wake → reduced rear drag pull
- Real-world and CFD validated
Note: CFD visualization shown under identical conditions and color scale. Results may vary depending on speed, crosswind, tires, and road surface.
How It Works
This visualization demonstrates high-speed streamlines staying attached to the body and underbody. With HALODISC 2, airflow around the wheel wells is less disturbed.
- Cleaner wheel-side flow: smoother passage around the front wheel.
- Smoother underbody: more orderly airflow, reduced drag pull.
- Tighter wake: smaller low-pressure zone behind the car, improving highway efficiency.
Note: CFD conducted under identical conditions; results may vary depending on speed, crosswind, and tires.
Front Wheel-Arch Close-Up
At the junction of the front bumper and wheel arch, the smooth, closed face of HALODISC 2 reduces turbulence caused by open spokes:
- A thinner shear layer at the arch lip prevents excess air from being drawn into the wheel well.
- Weaker vortex cores (visible as a smaller contracted ring), reduce turbulence inside the wheel.
- Cleaner underbody inflow, with straighter streamlines feeding the floor and diffuser.
Net Effect: lower overall drag, greater highway efficiency, and improved crosswind stability.
Why This Shape Saves Energy
By calming wheel-well turbulence, controlling separation, and smoothing underbody flow, HALODISC 2 delivers measurable improvements in both efficiency and stability at speed.
Slightly convex disc
Guides airflow to separate and reattach quickly, reducing turbulence ahead of the wheel.
Soft-radius edge (0.08–0.24 inches)
A 2–6 mm chamfer/round eases the pressure gradient, preventing sharp-edge separation and extra drag.
Flush fit with tire
Minimizes step changes and rim-edge vortex formation; also reduces side spray in wet weather.
Hidden brake venting
Discreet axial-in/radial-out channels behind the center-lock maintain effective brake cooling without compromising aerodynamics.
FAQ
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Is it always a 10% saving?
No. Savings are up to 10% in specific high-speed crosswind conditions.
Does it affect brake cooling?
Fine for daily/highway driving; for long descents or track use, remove the covers or reduce intensity.
Is it okay for automatic car washes?
Yes. Avoid close-range high-pressure jets at edges and periodically check clips/center
Will it always be quieter?
Usually a bit quieter, but tire noise remains dominant—set expectations accordingly.