Car tyre having a tread band comprising a central region extending across an equatorial plane (X-X) of the tyre, an outer shoulder region located towards an outer side of the tyre and an inner shoulder region located towards an inner side of the tyre; a first circumferential groove axially delimiting the outer shoulder region relative to the central region and a second circumferential groove axially delimiting the inner shoulder region relative to the central region; said central region having a width smaller than or equal to 35% of an effective width of said tread band; said outer shoulder region and said inner shoulder region having a width greater than or equal to 30% of an effective width of said tread band; said outer shoulder region and said inner shoulder region comprising a plurality of first transverse grooves (6, 7) having a first end located substantially at the respective edge of the tread band, a maximum width greater than or equal to 4 mm and an extension equal to at least 50% of the width of the shoulder region in which they are located; said central region comprising a first and a second circumferential rib (9, 10) separated from each other by a third circumferential groove, said first and second circumferential ribs (9, 10) comprising a plurality of second transverse grooves (11, 12); said outer shoulder region comprises a shoulder annular portion having a void-to-rubber ratio substantially equal to zero, located adjacent to said first circumferential groove; said first circumferential rib has a first annular portion having a void-to-rubber ratio substantially equal to zero, located adjacent to said first circumferential groove; said second circumferential rib has a second annular portion having a void-to-rubber ratio substantially equal to zero; characterized in that said outer shoulder region having a width greater than the width of the inner shoulder region; and in that said second transverse grooves of said first circumferential rib are counterinclined relative to the second transverse grooves of said second circumferential rib. a first circumferential groove axially delimiting the outer shoulder region relative to the central region and a second circumferential groove axially delimiting the inner shoulder region relative to the central region; said central region having a width smaller than or equal to 35% of an effective width of said tread band; said outer shoulder region and said inner shoulder region having a width greater than or equal to 30% of an effective width of said tread band; said outer shoulder region and said inner shoulder region comprising a plurality of first transverse grooves (6, 7) having a first end located substantially at the respective edge of the tread band, a maximum width greater than or equal to 4 mm and an extension equal to at least 50% of the width of the shoulder region in which they are located; said central region comprising a first and a second circumferential rib (9, 10) separated from each other by a third circumferential groove, said first and second circumferential ribs (9, 10) comprising a plurality of second transverse grooves (11, 12); said outer shoulder region comprises a shoulder annular portion having a void-to-rubber ratio substantially equal to zero, located adjacent to said first circumferential groove; said first circumferential rib has a first annular portion having a void-to-rubber ratio substantially equal to zero, located adjacent to said first circumferential groove; said second circumferential rib has a second annular portion having a void-to-rubber ratio substantially equal to zero; characterized in that said outer shoulder region having a width greater than the width of the inner shoulder region; and in that said second transverse grooves of said first circumferential rib are counterinclined relative to the second transverse grooves of said second circumferential rib.