# Droop (downstop)

> What is droop 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/droop/ · JSON: https://xemstudio.com/api/geometry?object=droop · Plain text: https://xemstudio.com/objects/droop/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

- Droop is how far the suspension extends below ride height, set with droop screws (Tekno). More front droop lets the nose rise on throttle and shifts weight back for exit traction; more rear droop gives more entry steering but less braking stability.
- Less droop suits smooth tracks and quick direction changes; more suits bumps and jump landings. EuroRC suggests adding 2-4 mm for rough surfaces.

## Sizes

| parameter | value or range | source |
|---|---|---|
| Rough-track change | +2-4 mm droop | EuroRC set-up guide |
| Left/right | must match | Tekno; EuroRC |

## 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
- EuroRC: [Short set-up guide](https://www.eurorc.com/page/135/short-set-up-guide) — web — Publisher's page; dimensions are facts

## Questions

**Smooth track?**

Less droop for responsiveness (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/)