What Is an Asymmetric Tyre?

An asymmetric tyre has a tread pattern that is deliberately different across the width of the tyre. The inner and outer sections are designed to perform different jobs rather than using the same pattern from one shoulder to the other.

Why Use Different Inner and Outer Tread Zones?

The inner section often contains more grooves and channels to help move water away from the contact patch, while the outer section may use larger, more rigid tread blocks to improve stability and grip when cornering. The exact design varies between tyre manufacturers and models.

How Do You Fit an Asymmetric Tyre?

Asymmetric tyres are marked on the sidewall with wording such as Outside and Inside. The side marked Outside must face away from the vehicle when the tyre is fitted.

Unlike a directional tyre, an asymmetric tyre is not normally restricted to one direction of rotation unless it is also specifically marked with a rotation arrow.

How Can You Tell if One Is Fitted Incorrectly?

Check the visible sidewall. If the side facing outward is marked Inside, the tyre has been mounted the wrong way round and should be corrected.

Asymmetric vs Directional Tyres

An asymmetric tyre is positioned according to which side faces outward. A directional tyre is positioned according to its direction of rotation. Some specialist tyres can combine both features, so always follow the markings on the sidewall.