Car tyres and the material used: What constitutes a tyre?

We use different tyres depending on the season and environment. These differences might be obvious, for example in the tread depth. However, they might be harder to spot or even go unnoticed in other areas. Take the tyre rubber compound, for example: Although different compounds are hard to distinguish from one another, they have a significant impact on tyre properties.

So, what exactly is a tyre made of?

Uniroyal. A brand of Continental.*