It's based on the tread pattern and structure of Nokian's Hakkapeliitta 8 SUV studded winter tire. At the press of a button, the studs on all four tires raise or lower.

If conditions improve, the air from the second chamber can be expelled and the studs will be pulled back inside. This sounds like a really interesting alternative to winter-specific tires ...

Studding the tires yourself isn't the safest option ... If you're adventurous enough to brave winter riding, studded tires can extend your season year-round. You'll be riding in February while ...

To beat winter weather, drivers may choose between winter tires, studded winter tires, and tire chains (or cables). Unfortunatley, the multiple choices often create a driver dilemma: Are winter ...

The WSDOT recommended motorists visit a tire dealer to learn more about stud-free winter traction tires that are legal for year-round use and don't cause the same roadway damage as studded tires.