Stay wheel side down next time you are riding in the snow or on ice with Nokian's Hakkapelitta W106 Studded Snow Tires. The 106 Carbide studs provide awesome traction whilst also being durable for when you stray onto the tarmac.
Very durable steel studs with carbide pin (106 pcs for 700x35, 72 pcs for 700x32)
Non-toxic snow rubber tread (durometer 58A)
Durable gumwall casing with wire beads