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Rear wing placement (height and fore-aft)
Where should a rear wing be mounted on a car? · Standard part · basis: Design rules and figures from the cited sources; example geometry by Xem Studio
Also called: rear wing placement, wing height, wing mounting position, where to mount a rear wing, wing above roofline, wing in clean air, wing position aero balance, rear wing location, time attack wing position
Exact dimensions. True size, with no printing tolerance added.
- sizes
- 4 in table
Notes
- HPA's starting point is to put the forward third of the wing over the boot and the rear two-thirds behind it, with the leading edge level with the roofline seen from the front.
- Higher and further rearward gives more rear aero balance; lower positions interact with the body and floor but too low puts the wing in the cabin wake and performance drops substantially (HPA).
- RC classes constrain this by rule: touring-car wings must stay below the roofline (AARCMCC).
- The file is a reference example built by Xem Studio from the numbers above (Reference wing as in single-element entry.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle.
Rear wing placement size chart
| parameter | value or range | source |
|---|---|---|
| Fore-aft starting point | front 1/3 over boot, rear 2/3 behind | HPA rear wing |
| Height starting point | leading edge level with roofline (front view) | HPA rear wing |
| RC touring car wing height | must be lower than the roof line | AARCMCC |
| RC touring car rear overhang | max 10 mm beyond body incl. bumper | AARCMCC |
Where the files are
Other publishers' files are linked, not hosted. "verify" = check the license at the link before commercial use.
| High Performance Academy | Aerodynamic performance devices for club level cars: rear wing theory | web | Publisher's page; dimensions are facts |
| AARCMCC | Section 3: Electric On Road, Technical Rules (Oct 2006) | web | Publisher's page; dimensions are facts |
Free files
★ Free files 1 parts. Xem Studio design: free to use, print and sell things from; not to be republished as files. Xem Studio Design License. index.json
| rear-wing-placement-rear-wing | single rear wing: span 1600 × chord 250 mm at 6°, endplates 300 mm, inverted NACA 4412 section (mounts from below) | STEP · STL |
https://xemstudio.com/mcp to Claude, ChatGPT, Cursor or any MCP client (free, no account, one minute) and it can look up exact sizes, mating fits and free STEP/STL from every chat.Plain text: sheet.txt · JSON: /api/geometry?object=rear-wing-placement

Fits with
Questions
Is higher always better?
Higher gets cleaner air, but rules often restrict it; lower positions add interaction but risk the cabin wake (HPA).





