# Anti-roll (sway) bar

> What does a sway bar do on an RC car?

- Category: Car design › Suspension geometry
- Kind: Standard part
- Basis: Design rules and figures from the cited sources; example geometry by Xem Studio
- Page: https://xemstudio.com/objects/anti-roll-bar/ · JSON: https://xemstudio.com/api/geometry?object=anti-roll-bar · Plain text: https://xemstudio.com/objects/anti-roll-bar/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); files CC BY 4.0 or their publisher's 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

- An anti-roll bar links left and right wheels so the car rolls less. Stiffening one end reduces that end's grip: a thicker front bar gives less front traction and less off-power steering but quicker response; a thicker rear bar gives less rear traction and more on-power steering (Tekno).
- Thicker bars at either end reduce chassis roll (CompetitionX).

## Sizes

| parameter | value or range | source |
|---|---|---|
| Thicker front | less front roll and grip, quicker response | Tekno setup guide |
| Thicker rear | less rear grip, more on-power steering | Tekno setup guide |

## Where the files are

- Tekno RC: [Tekno RC Setup Guide](https://teknoforums.com/misc/Tekno-RC-Setup-Guide.pdf) — web — Publisher's page; dimensions are facts
- CompetitionX: [RC Quick Setup Guide](https://www.competitionx.com/?p=129) — web — Publisher's page; dimensions are facts

## Questions

**Want more steering?**

Thinner front or thicker rear bar (Tekno).

## Fits with

- [Camber angle](https://xemstudio.com/objects/camber/)
- [Caster angle](https://xemstudio.com/objects/caster/)
- [Front kick-up (RC)](https://xemstudio.com/objects/kick-up/)
- [Front toe (toe-in / toe-out)](https://xemstudio.com/objects/toe-front/)
- [Rear toe-in](https://xemstudio.com/objects/toe-rear/)
- [Ackermann steering geometry](https://xemstudio.com/objects/ackermann/)