Tyre for wheels of vehicles, comprising a tread band, on which there are defined: - a first shoulder region and a second shoulder region that are axially opposite; - a central region that is interposed between said first and second shoulder region; - a plurality of pairs of first blocks and second blocks that are provided in regular succession over the circumferential extent of said central region, each first block and each second block of each of said pairs being at least partially aligned in an axial direction that is defined on said tread band, - a plurality of first pairs of main grooves (10, 20) that are provided in regular succession over the circumferential extent of said tread band in order to partially delimit said first and said second blocks (7, 8), each first pair being formed by a first main groove that extends from said first shoulder region towards said central region, and by a second main groove that extends from said second shoulder region towards said central region, - a plurality of second pairs of main grooves (30, 40) that are provided in regular succession over the circumferential extent of said tread band in an alternating position with said first pairs of main grooves (10, 20), each second pair being formed by a third main groove that extends from said first shoulder region towards said central region, and by a fourth main groove that extends from said second shoulder region towards said central region, said third and said fourth main grooves not intersecting any other first, second, third or fourth main groove, wherein said second main groove comprises an axially internal end that is connected to said first main groove and wherein said first main groove comprises an axially internal end segment that is connected to a second main groove which is successive to said second main groove so as to separate a first block and a second block of one of said pairs of first and second blocks, and wherein a plurality of first pairs of secondary grooves (50, 60) are made in said tread band, which are provided in regular succession over the circumferential extent of said tread band in order to at least partially delimit said first and said second blocks (7, 8) on the axially external side thereof, each first pair of secondary grooves being formed by a first secondary groove that extends between two of said first main grooves, which are mutually successive, and by a second secondary groove that extends between two of said second main grooves, which are mutually successive. - a first shoulder region and a second shoulder region that are axially opposite; - a central region that is interposed between said first and second shoulder region; - a plurality of pairs of first blocks and second blocks that are provided in regular succession over the circumferential extent of said central region, each first block and each second block of each of said pairs being at least partially aligned in an axial direction that is defined on said tread band, - a plurality of first pairs of main grooves (10, 20) that are provided in regular succession over the circumferential extent of said tread band in order to partially delimit said first and said second blocks (7, 8), each first pair being formed by a first main groove that extends from said first shoulder region towards said central region, and by a second main groove that extends from said second shoulder region towards said central region, - a plurality of second pairs of main grooves (30, 40) that are provided in regular succession over the circumferential extent of said tread band in an alternating position with said first pairs of main grooves (10, 20), each second pair being formed by a third main groove that extends from said first shoulder region towards said central region, and by a fourth main groove that extends from said second shoulder region towards said central region, said third and said fourth main grooves not intersecting any other first, second, third or fourth main groove, wherein said second main groove comprises an axially internal end that is connected to said first main groove and wherein said first main groove comprises an axially internal end segment that is connected to a second main groove which is successive to said second main groove so as to separate a first block and a second block of one of said pairs of first and second blocks, and wherein a plurality of first pairs of secondary grooves (50, 60) are made in said tread band, which are provided in regular succession over the circumferential extent of said tread band in order to at least partially delimit said first and said second blocks (7, 8) on the axially external side thereof, each first pair of secondary grooves being formed by a first secondary groove that extends between two of said first main grooves, which are mutually successive, and by a second secondary groove that extends between two of said second main grooves, which are mutually successive.