Tyre, having a tread band comprising: - a central annular portion, located across the equatorial plane (X-X), and two shoulder annular portions (A2, A3), separated from said central annular portion by two circumferential grooves (3, 4); said central annular portion having at least one circumferential row of central blocks, comprising a plurality of central blocks, and at least two rows (9, 10) of lateral blocks, opposed to each other relative to said at least one circumferential row of central blocks, and comprising a plurality of lateral blocks, wherein - said central blocks have a first and a second portion (20a; 20b) located opposite to each other relative to the equatorial plane (X-X); - said lateral blocks have an elongate portion and a head portion located at an end of said elongate portion; said elongate portion having a dimension S1 in axial direction and said head portion having a dimension S2 in axial direction, where S2>S1; - the elongate portion extends according to an extension direction forming an angle α relative to the equatorial plane comprised between 0° and 30°; - said elongate portion has an axially outer lateral wall facing one of said circumferential grooves (3, 4) and an axially inner lateral wall facing one of said first and second portions (20a, 20b) of the central blocks; - said head portion has a first transverse wall located so as to form with said axially inner lateral wall a concavity which points towards the equatorial plane (X-X) and is such that the first or the second portion (20a; 20b) of the central block being subsequent in axial direction faces said concavity and is at least partially surrounded by said axially inner lateral wall and by said first transverse wall; - each shoulder annular portion (A2, A3) has a row (11, 12) of shoulder blocks comprising a plurality of shoulder blocks, the blocks of said plurality being circumferentially separated with each other by shoulder transverse grooves; characterized in that: said central blocks and said lateral blocks have a circumferential dimension greater than 2% of the development extension of the tread of the tyre; - in said tread band the number of shoulder blocks is greater than the number of lateral blocks. - a central annular portion, located across the equatorial plane (X-X), and two shoulder annular portions (A2, A3), separated from said central annular portion by two circumferential grooves (3, 4); said central annular portion having at least one circumferential row of central blocks, comprising a plurality of central blocks, and at least two rows (9, 10) of lateral blocks, opposed to each other relative to said at least one circumferential row of central blocks, and comprising a plurality of lateral blocks, wherein - said central blocks have a first and a second portion (20a; 20b) located opposite to each other relative to the equatorial plane (X-X); - said lateral blocks have an elongate portion and a head portion located at an end of said elongate portion; said elongate portion having a dimension S1 in axial direction and said head portion having a dimension S2 in axial direction, where S2>S1; - the elongate portion extends according to an extension direction forming an angle α relative to the equatorial plane comprised between 0° and 30°; - said elongate portion has an axially outer lateral wall facing one of said circumferential grooves (3, 4) and an axially inner lateral wall facing one of said first and second portions (20a, 20b) of the central blocks; - said head portion has a first transverse wall located so as to form with said axially inner lateral wall a concavity which points towards the equatorial plane (X-X) and is such that the first or the second portion (20a; 20b) of the central block being subsequent in axial direction faces said concavity and is at least partially surrounded by said axially inner lateral wall and by said first transverse wall; - each shoulder annular portion (A2, A3) has a row (11, 12) of shoulder blocks comprising a plurality of shoulder blocks, the blocks of said plurality being circumferentially separated with each other by shoulder transverse grooves; - in said tread band the number of shoulder blocks is greater than the number of lateral blocks.