Abstract: A tyre with a tread band having a plurality of blocks. The blocks include three-dimensional sipes extending in a direction incident to an advance direction of the tyre. Each sipe separates a block into a first block portion having a first surface facing the advance direction, and into a second block portion having a second surface facing the direction counter to the advance direction. Male/female couplings are provided between the first and the second block portions, the couplings formed by protuberances on the first surface and extending towards the second block portion, and by recesses on the second surface and extending away from the first block portion. The protuberances formed on the first surface have an apex that is spaced apart from the tread surface by no more than 40% of the depth of the three-dimensional sipe, measured at the apex.

Abstract: A tire for vehicle wheels comprises a tread band (2), on which a first circumferential rib (14) is formed, on which a plurality of first notches (20) are formed, which extend as a whole over at least 80% of the width of the first circumferential rib and each of which comprises: ? i. a first portion (21) which is substantially rectilinear and has a first inclination with respect to a circumferential direction, ? ii. a second portion (22) which is substantially rectilinear and has a second inclination with respect to the circumferential direction having a sign opposite to said first inclination, and ? iii. a connecting portion (23) that extends between said first portion and said second portion; respective pluralities of the second and the third notches (30; 40), which are blind and substantially parallel to the first (21) and the second portion (22), respectively, of said first notches (20), are further formed on the first circumferential rib (14).

Abstract: Tyre (1) for vehicle wheels comprises a tread band (2) on which there are formed—a pair of shoulder regions (7, 8) that are axially opposite one another;—at least a first circumferential rib (12) interposed between said pair of shoulder regions and delimited by a first pair of circumferential grooves (10, 11);—a plurality of first blind recesses (20), which are formed in said first circumferential rib (12) and have a first longitudinal extension, and—a plurality of second blind recesses (30), which are formed in said first circumferential rib (12) and have a second longitudinal extension that is smaller than said first longitudinal extension,—at least a second circumferential rib (15) interposed between said pair of shoulder regions and delimited by a second pair of circumferential grooves (13, 14), and;—a plurality of through-recesses (40), which are formed in said second circumferential rib (15) and extend between the grooves of said second pair of circumferential grooves.

Abstract: A tire for vehicle wheels comprises a tread band (2), on which a first circumferential rib (14) is formed, on which a plurality of first notches (20) are formed, which extend as a whole over at least 80% of the width of the first circumferential rib and each of which comprises: ? i. a first portion (21) which is substantially rectilinear and has a first inclination with respect to a circumferential direction, ? ii. a second portion (22) which is substantially rectilinear and has a second inclination with respect to the circumferential direction having a sign opposite to said first inclination, and ? iii. a connecting portion (23) that extends between said first portion and said second portion; respective pluralities of the second and the third notches (30; 40), which are blind and substantially parallel to the first (21) and the second portion (22), respectively, of said first notches (20), are further formed on the first circumferential rib (14).

Abstract: A tyre with a tread band having a plurality of blocks. The blocks include three-dimensional sipes extending in a direction incident to an advance direction of the tyre. Each sipe separates a block into a first block portion having a first surface facing the advance direction, and into a second block portion having a second surface facing the direction counter to the advance direction. Male/female couplings are provided between the first and the second block portions, the couplings formed by protuberances on the first surface and extending towards the second block portion, and by recesses on the second surface and extending away from the first block portion. The protuberances formed on the first surface have an apex that is spaced apart from the tread surface by no more than 40% of the depth of the three-dimensional sipe, measured at the apex.