Winter car tyre

A tyre provided with a tread band having a width and comprising a plurality of grooves distributed with a void-to-rubber ratio equal to or greater than 0.30 in the tread band (1), the plurality of grooves comprising:

• a central circumferential groove, located at an equatorial plane (X-X) to separate a first region (L1) and a second region (L2) of the tread band from each other;
• a plurality of pairs of first transverse grooves, wherein each pair having two first transverse grooves opposed to each other relative to a direction parallel to the equatorial plane (X-X);
• each of the first transverse grooves having:
• a first end located substantially at a respective edge of the first and second regions of the tread band, a maximum width greater than or equal to 4 mm, and an extent equal to at least 40% of an effective width (L) of the tread band;
• a plurality of pairs of second transverse grooves, wherein each pair having two second transverse grooves opposed to each other relative to the equatorial plane (X-X), counter-inclined relative to the first transverse grooves, and intersecting the first transverse grooves, respectively in the first region (L1) or in the second region (L2) of the tread band;
• the second transverse grooves having a maximum width and a depth smaller than or equal to those of the first transverse grooves, and an extent equal to at least 35% of the effective width (L) of the tread band;
• the tread band further comprising a plurality of first transverse sipes extending concordantly to the first grooves.