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Spoilers / V3 Beta

V3 Beta

A full-width exoskeleton airfoil that wraps the trunk lid edge, with clean tips and no endplates. On our finest simulation it adds about 120 N of rear downforce at 80 mph and trims drag by about 3%.

White Model 3 with the V3 Beta spoiler, rear three-quarter view
V3 Beta spoiler seen straight from behind on a grey Model 3
Side view of a grey Model 3 with the V3 Beta spoiler
The V3 Beta spoiler on its own, matte black, seen from above and behind

What the CFD says

Changes against the same Model 3 with no spoiler at 80 mph, from our finest simulation: transient DDES on a 17.2 million cell mesh. ± is one standard error. Negative lift is downforce.

−119 N ±12Rear-axle lift: that much more downforce
−60 NOf it, on the rear glass, deck and spoiler
−9.6 N ±2.3Drag (−2.7%)
−0.34 kWPower to push the air aside at 80 mph
Mean surface pressure on the rear of a Model 3 with the V3 Beta
Mean surface pressure on the rear of a Model 3 with no spoiler
Surface pressure (pressure coefficient)
pullspushes

Mean surface pressure, finest mesh. Drag the handle: the red patch on the trunk lid is the pressure that pushes the rear down. Spin the car in the airflow viewer.

Our earlier 9 million cell run put the drag saving at 18 ± 4 N; the finest mesh says 10 N, about 3%. Rear downforce held: 125 N then, 119 N now, with a much tighter error bar.

Against the V3 Alpha on the same finest mesh the two are a statistical tie: the differences in drag and rear downforce (2 N and 10 N) are inside the error bars. Every number here comes from the same car model and settings, so they compare like for like.

Full method and data in the white paper

Status

SimulationComplete CFDTransient at two mesh levels, the finest at 17 million cells.
On the carNo result yet pending
Controlled testNot yet run pending

Construction

The airfoil is the structure

The spoiler is an exoskeleton airfoil: its single 0.7 mm wall of carbon fiber reinforced plastic is both the aerodynamic surface and the structure. That is how it stays this light.

Weight≈225 g (0.50 lb) calculatedFrom the CAD skin at the 0.7 mm wall. Excludes the section joints and tape. Measured finished weight will be posted after weigh-in.
Measured weightNot yet published pending
Skin0.7 mm single wall
MaterialCarbon fiber reinforced plastic
FinishMatte black
flow102 mm at the centerline0.7 mm single wall (12x)
Section at the centerline, drawn from the CAD at true proportions. The skin is the structure: a single 0.7 mm wall shaped as the airfoil itself.
Dimensions
Span, tip to tip1,380 mm
Depth102 mm at the centerline, 59 mm outboard
Profile height26 mm max
FitmentTesla Model 3, 2017 to 2026Coming soon: Model Y Gen 1 and the refreshed Model Y.

In the box

  1. 8 numbered sectionsThey snap together in order, 1 to 8.
  2. Pre-cut mounting tapeAlready cut to fit.
  3. Surface-prep wipeCleans the trunk lid before the tape goes on.
  4. Build videoThe video is the manual, step by step.

Professional installation recommended

The V3 Beta is bonded once. It is not designed to be removed, repositioned, or adjusted after installation: pulling or shifting it can crack or tear the 0.7 mm skin. Have a professional installer fit it, and dry-fit before any tape liner comes off.

Read the installation notes

Effort tally

What went into it

The running count for the Model 3 spoiler program, totals only.

CFD receipt

Tesla Model 3 spoiler program

Updated October 28, 2026

CFD solver runs
249
  over 10 minutes
156
Iterations + time steps
438,164
Meshes built
245
Solver hours, CPU-equiv.
≈665
CPU-equiv. core-hours
≈9,100

Totals only. All runs in OpenFOAM. Counts are lower bounds.

Simulated first. Made second.

V3 Beta$999
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