Studded tyre for vehicles

A tyre comprising:

• a tread having tread blocks;
• a plurality of stud holes;
• and
• a plurality of studs installed in at least some of the stud holes;
• wherein:
• studs in a centre area of the tyre have a higher protrusion from a surface of the tread than studs in a shoulder area of the tyre;
• a protrusion of a majority of the studs in the centre area of the tyre is in a range from 1.0 to 1.3 mm and a protrusion of a majority of the studs in the shoulder area of the tyre is in a range from 0.8 to 1.0 mm, and the protrusion of the studs in the centre area is at least 0.1 mm higher than the protrusion of the studs in the shoulder area;
• or
• an average protrusion of the studs in the centre area of the tyre is in a range from 1.0 to 1.3 mm and an average protrusion of the studs in the shoulder area of the tyre is in a range from 0.8 to 1.0 mm, and the protrusion of the studs in the centre area is at least 0.1 mm higher than the protrusion of the studs in the shoulder area;
• or
• the protrusion of the studs in the centre area of the tyre is in a range from 1.1 to 1.2 mm and the protrusion of the studs in the shoulder area of the tyre is in a range from 0.9 to 1.0 mm;
• or
• the protrusion of the studs in the centre area of the tyre is in a range from 0.9 to 1.1 mm and the protrusion of the studs in the shoulder area of the tyre is in a range from 0.8 to 1.0 mm, and the protrusion of the studs in the centre area is at least 0.1 mm higher than the protrusion of the studs in the shoulder area.