A tire comprising - a tread provided with a first tread block (TB 1) separated from another tread block (TB 2, TB 3, TB 4) by a portion of a groove, wherein - the first tread block (TB 1) comprises • a first primary first wall (W 111) and • a second primary first wall (W 211) such that a primary first sipe (S 11) is arranged between the first primary first wall (W 111) and the second primary first wall (W 211), wherein - the first primary first wall (W 111) is provided with a first primary first wall indentation (WI 111) and first primary first wall protrusion (WP 111), - the second primary first wall (W 211) is provided with a second primary first wall indentation (WI 211) and second primary first wall protrusion (WP 211), - first primary first wall (W 111) defines a first primary first wall surface (WS 111) having the shape of a planar surface or a curved surface, from which the first primary first wall protrusion (WP 111) protrudes and into which the first primary first wall indentation (WI 111) descends, - the second primary first wall (W 211) defines a second primary first wall surface (WS 211) having the shape of a planar surface or a curved surface, from which the second primary first wall protrusion (WP 211) protrudes and into which the second primary first wall indentation (WI 211) descends, - the first primary first wall indentation (WI 111) is geometrically congruent with the second primary first wall protrusion (WP 211), and - the first primary first wall protrusion (WP 111) is geometrically congruent with the second primary first wall indentation (WI 211), characterized in that - the first primary first wall protrusion (WP 111) is antisymmetric about all such planes (W AS) that have a normal that is parallel to a wall projection line (PR W), which is a projection of a line that remains in between a centre of the first primary first wall protrusion (WP 111) and a centre of the first primary first wall indentation (WI 111), the projection being a normal projection to the first primary first wall surface (WS 111). - a tread provided with a first tread block (TB 1) separated from another tread block (TB 2, TB 3, TB 4) by a portion of a groove, wherein - the first tread block (TB 1) comprises • a first primary first wall (W 111) and • a second primary first wall (W 211) such that a primary first sipe (S 11) is arranged between the first primary first wall (W 111) and the second primary first wall (W 211), wherein • a first primary first wall (W 111) and • a second primary first wall (W 211) such that a primary first sipe (S 11) is arranged between the first primary first wall (W 111) and the second primary first wall (W 211), wherein - the first primary first wall (W 111) is provided with a first primary first wall indentation (WI 111) and first primary first wall protrusion (WP 111), - the second primary first wall (W 211) is provided with a second primary first wall indentation (WI 211) and second primary first wall protrusion (WP 211), - first primary first wall (W 111) defines a first primary first wall surface (WS 111) having the shape of a planar surface or a curved surface, from which the first primary first wall protrusion (WP 111) protrudes and into which the first primary first wall indentation (WI 111) descends, - the second primary first wall (W 211) defines a second primary first wall surface (WS 211) having the shape of a planar surface or a curved surface, from which the second primary first wall protrusion (WP 211) protrudes and into which the second primary first wall indentation (WI 211) descends, - the first primary first wall indentation (WI 111) is geometrically congruent with the second primary first wall protrusion (WP 211), and - the first primary first wall protrusion (WP 111) is geometrically congruent with the second primary first wall indentation (WI 211), characterized in that - the first primary first wall protrusion (WP 111) is antisymmetric about all such planes (W AS) that have a normal that is parallel to a wall projection line (PR W), which is a projection of a line that remains in between a centre of the first primary first wall protrusion (WP 111) and a centre of the first primary first wall indentation (WI 111), the projection being a normal projection to the first primary first wall surface (WS 111).