# Lock-Up

> Lock-Up — motorsport glossary term on TRAACKS.

## Definition

When a wheel stops rotating under braking while the car is still moving, causing the tire to skid. Lock-ups create flat spots on the tire surface, which cause vibrations and reduce performance. They often appear as a puff of tire smoke.

- **Category**: Technical
- **TRAACKS page**: [https://traacks.club/glossary/lock-up](https://traacks.club/glossary/lock-up)

## Related Terms

- [Braking Zone](https://traacks.club/glossary/braking-zone)
- [Flat Spot](https://traacks.club/glossary/flat-spot)
- [Tire Degradation](https://traacks.club/glossary/tire-degradation)

## Links

- [Full glossary](https://traacks.club/glossary)
- [TRAACKS llms.txt](https://traacks.club/llms.txt)