Tesla Model 3 rear spoilers
Two rear spoilers from a CFD program with 438,164 solver iterations behind it. Nothing gets made until the numbers hold up. The engineering is the product.
Both start from the same exoskeleton airfoil. V3 Beta keeps clean tips; V3 Alpha adds two swept plates. On our finest mesh both add 110 to 119 N of rear downforce at 80 mph and trim drag by 2 to 3%. Within the error bars, that is a tie.
About 120 N of rear downforce at 80 mph. Clean tips, no endplates.
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%.
About 110 N of rear downforce at 80 mph.
The V3 Beta airfoil with two swept endplates at chopped tips. On our finest simulation it adds about 110 N of rear downforce at 80 mph and trims drag by about 2%.
Fits Tesla Model 3, 2017 to 2026. Coming soon: Model Y Gen 1 and the refreshed Model Y.
New: airflow
Spin a Model 3 at 80 mph, take the spoiler on and off, and see the wake and the pressure that holds the rear down. Every picture comes from the same simulations as the numbers, on a 17.2 million cell mesh.
Open the airflow viewerThe rule behind every design on this site. Nothing skips a step.
Every shape runs in CFD before anything is made. Most ideas end here, on a screen, for the cost of compute.
Only designs that hold up in simulation, on more than one mesh and more than one method, get made.
Physical and track testing is the last gate. Every on-car result is published labeled for what it is.
The work behind it
This is the running count of CFD on the Model 3 spoiler program: every solver run, every mesh, every hour. It is the work the price pays for.
See the resultsTesla Model 3 spoiler program
Updated October 28, 2026
Totals only. All runs in OpenFOAM. Counts are lower bounds.
Simulated first. Made second.
On the developer’s Model 3 Performance
300 → 240 Wh/mi
Owner-reported after fitting the V3 Alpha. One car, not a controlled test. From drag alone, our finest simulation predicts about 3 Wh/mi less at the wheels at a steady 80 mph, far less than this. Treat it as one car’s observation until a controlled test is run.
Run the numbers for your state, your miles and your view of future electricity prices. Every scenario is calculated on our server from the same model.
Open the calculatorThe skin is 0.7 mm thick. The spoiler is not designed to be removed, repositioned, or adjusted after it is installed, and trying can damage it. We strongly recommend professional installation.
Installation guide