# RC buggy / off-road rear wing

> Why are RC buggy wings so big and flat with tall side dams?

- Category: Car design › Car aero
- Kind: Standard part
- Basis: Design rules and figures from the cited sources; example geometry by Xem Studio
- Page: https://xemstudio.com/objects/rc-buggy-wing/ · JSON: https://xemstudio.com/api/geometry?object=rc-buggy-wing · Plain text: https://xemstudio.com/objects/rc-buggy-wing/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files Xem Studio Design License (free to use and sell from, not to redistribute as files: https://xemstudio.com/license/)
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- Off-road RC wings are large, thin polycarbonate plates with tall side dams. EFRA lets a 1/10 off-road wing be 220 mm wide with its profile inside an 80 x 80 mm box, and any side dam inside 80 x 80 mm.
- The wing adds rear traction, high-speed stability and control in the air; more rear wing gives a nose-up attitude on jumps (CompetitionX). Tall side dams are sold specifically to add side bite and centre dividers for straight-line stability (LiveRC).
- Short-course trucks are covered by their own class rules; the fetched sources do not give their wing dimensions.
- Used on: 1/10 2WD and 4WD off-road buggies.
- The file is a reference example built by Xem Studio from the numbers above (EFRA 1/10 off-road maximum box; aoa illustrative.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle.

## Sizes

| parameter | value or range | source |
|---|---|---|
| 1/10 off-road wing | max 220 mm wide; profile in 80 x 80 mm rectangle | EFRA |
| Side dam | fit 80 x 80 mm rectangle | EFRA |
| 1/10 off-road overall width | max 250 mm | EFRA |
| Example aftermarket wing width | 7 in (178 mm) | LiveRC |

## Where the files are

- EFRA: [EFRA Handbook 2010, Appendix 3: Electric Cars](https://www.efra.ws/wp-content/uploads/2010/03/Handb10App3.pdf) — web — Publisher's page; dimensions are facts
- LiveRC: [Revolution Design 7in ultra high downforce wing](https://www.liverc.com/news/new-revolution-design-7-ultra-high-downforce-wing/) — web — Publisher's page; dimensions are facts
- CompetitionX: [RC Wings Explained](https://www.competitionx.com/?p=489) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, Xem Studio Design License, Xem Studio)

Index: https://xemstudio.com/files/hardware/rc-buggy-wing/index.json · license: https://xemstudio.com/files/hardware/rc-buggy-wing/LICENSE.md

- rc-buggy-wing-rear-wing: [STEP](https://xemstudio.com/files/hardware/rc-buggy-wing/rc-buggy-wing-rear-wing.step) · [STL](https://xemstudio.com/files/hardware/rc-buggy-wing/rc-buggy-wing-rear-wing.stl) — single rear wing: span 220 × chord 80 mm at 6°, endplates 80 mm, inverted NACA 4412 section (mounts from below)

## Questions

**Why does more wing change jumps?**

Rear downforce and drag pitch the car nose-up in the air (CompetitionX).

## Fits with

- [Single-element rear wing (race car)](https://xemstudio.com/objects/rear-wing-single-element/)
- [Dual-element (two-element) rear wing](https://xemstudio.com/objects/rear-wing-dual-element/)
- [Swan-neck rear wing mount](https://xemstudio.com/objects/swan-neck-wing-mount/)
- [Gurney flap / wickerbill](https://xemstudio.com/objects/gurney-flap-wickerbill/)
- [Wing endplates / side dams](https://xemstudio.com/objects/wing-endplates/)
- [Front splitter](https://xemstudio.com/objects/front-splitter/)