Patent ID: 8113250

Claim:
A studded air-filled vehicle tire, having one rolling direction, and comprising a rubber tread with pattern blocks, grooves separating said blocks and premade stud holes in said tread, said tire being provided with anti-slip studs having a total length, said studs being inserted in at least some of said stud holes, each of said studs comprising: a body with a bottom flange and a shank element extending outwardly from the bottom flange, said bottom flange having a quadrangular shape with diagonal dimensions perpendicular to said total length and perpendicular to each other, the bottom flange having four sides of equal length; and a hard cermet piece made from a different material than said body and positioned at least partially within the body, said hard cermet piece having a substantially quadrangular shape with mutually different diagonal dimensions that extend perpendicular to said total length and perpendicular to each other, the hard cermet piece having four sides of equal length; wherein substantially all of the anti-slip studs in the stud holes are orientated so that one of said diagonal dimensions of the hard cermet pieces is substantially parallel to the rolling direction or forms a toe-out angle with respect to the rolling direction that is smaller than 10 degrees.