What does the designation “TWI” (Tread Wear Indicator) mean?

The designation "TWI" stands for Tread Wear Indicator, which is crucial for assessing tyre safety. It indicates the level of wear on tyre tread. When the tread wears down to the indicators, it suggests that the tyre has reached its minimum legal tread depth and should be replaced.

In Germany, maintaining proper tyre tread depth is essential for safe driving and adheres to the Straßenverkehrs-Zulassungs-Ordnung (StVZO), the vehicle registration regulations. This ensures vehicles have sufficient grip on the road, especially in wet conditions, thus helping to prevent accidents.

Understanding both tyre wear indicators and other aspects, such as recutting or tubeless tyre characteristics, provides a comprehensive view of tyre safety, but in this context, the emphasis is primarily on the tread wear indicator.