The new concept of an all-purpose tire combines the properties of two types of tires — friction and studded. When activated, it is capable of showing excellent grip during braking and acceleration on icy roads, and in normal mode it behaves like a friction model on dry pavement.
More details on how justified this approach is and how the retractable studs work are described in our review "How it works: Nokian tires with retractable studs".








