The development of the Nokian WR A4 winter tire took around 4 years. Like its popular predecessor, this model is designed for Central and Western European countries, where winter climate conditions are more than specific. For this reason, it demonstrates its strongest sides on wet asphalt and on snow, and the rubber compound of its tread is designed for operation at temperatures around zero degrees Celsius.

One of the key innovations of the novelty is the Functional Performance Siping tread lamination technology. Its essence lies in the use of several types of lamellas at once, each of which, together with the blocks, performs a certain range of functions.

Another difference from the previous generation model is the design of the shoulder area from the outside of the tread. It contains many transverse blocks with high structural rigidity, connected to each other by special bridges. Such a multi-component structure works as a whole, which increases the stability of the tire when gaining speed. Additionally, this property is enhanced by self-locking 3D lamellas, which also improve the responsiveness of the steering.

In the central part of the tread, there is a continuous longitudinal rib, the shape of which, due to the many blocks, resembles a centipede. Moreover, Centipede Siping lamellas are cut into these elements. They increase the size of the contact patch, forming many additional gripping edges that improve the tire's performance during acceleration.

Key features of Nokian WR A4

- Functional Performance Siping tread lamination technology improves almost all basic characteristics of the tire;
- the multifunctional longitudinal rib in the center improves traction on slippery roads, directional stability, steering responsiveness, and fuel efficiency;
- wide blocks in the shoulder area on the outside of the tread provide reliable and stable behavior during braking and maneuvering.