# RC on-road touring car wing

> Why are RC touring car wings shaped the way they are?

- 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-touring-car-wing/ · JSON: https://xemstudio.com/api/geometry?object=rc-touring-car-wing · Plain text: https://xemstudio.com/objects/rc-touring-car-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

- 1/10 touring-car wings are rule-limited airfoil plates on the body's tail. AARCMCC ISTC rules cap width at 125-190 mm and chord at 20-40 mm including flaps, require the wing to stay below the roofline and allow 40 x 20 mm side dams; EFRA caps width at 190 mm and fits the profile in a 25 x 40 mm box.
- Because the box is fixed, designers reshape mounts to use the full allowance: one aftermarket wing drops its mounting pocket 6 mm so the full 20 mm height stays under the roofline (LiveRC).
- The wing adds rear traction and high-speed stability; too much makes the car safe but reluctant to rotate (CompetitionX).
- Used on: 1/10 ISTC electric touring cars.
- The file is a reference example built by Xem Studio from the numbers above (Max EFRA/AARCMCC touring box; aoa illustrative.). Sizes the sources do not fix are illustrative; scale the example to your own vehicle.

## Sizes

| parameter | value or range | source |
|---|---|---|
| ISTC wing width (incl. endplates) | 125-190 mm | AARCMCC |
| ISTC wing chord (incl. flaps) | 20-40 mm | AARCMCC |
| ISTC endplate / side dam | 40 x 20 mm | AARCMCC |
| EFRA touring wing | max 190 mm wide; profile in 25 x 40 mm rectangle | EFRA |
| Wing height rule | below roofline | AARCMCC |
| Aftermarket wing height | 20 mm (legal limit) | LiveRC |
| 1/10 track (GT) wing | 250 mm wide, 55 mm chord | AARCMCC |

## Where the files are

- AARCMCC: [Section 3: Electric On Road, Technical Rules (Oct 2006)](https://www.rctech.net/forum/attachments/australian-racing/180184d1162811203-aarcmcc-online-tech-road-oct-06.pdf) — web — Publisher's page; dimensions are facts
- 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: [Leadfinger Racing MaxSpec-20 Vortex TC wing](https://www.liverc.com/news/new-leadfinger-racing-maxspec-20-vortex-tc-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-touring-car-wing/index.json · license: https://xemstudio.com/files/hardware/rc-touring-car-wing/LICENSE.md

- rc-touring-car-wing-rear-wing: [STEP](https://xemstudio.com/files/hardware/rc-touring-car-wing/rc-touring-car-wing-rear-wing.step) · [STL](https://xemstudio.com/files/hardware/rc-touring-car-wing/rc-touring-car-wing-rear-wing.stl) — single rear wing: span 190 × chord 40 mm at 6°, endplates 20 mm, inverted NACA 4412 section (mounts from below)

## Questions

**Why are side dams so small?**

Rules limit them, e.g. 40 x 20 mm in AARCMCC ISTC rules.

## 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/)