Gravdal Studded TireDescription Versatile and confidence inspiring, the Gravdal securely navigates through harsh winter conditions with carbide studs for added traction in icy conditions. Features Siping creates a more conforming lug for added traction Carbide studs tear into slick surfaces Fast rolling ramped center lugs provide decreased rolling resistance Aggressive rear faces of center lugs provide excellent braking traction Tubeless ready (60 TPI) or wire bead (33