Abstract: Tire for vehicle wheels includes a tread pattern defined by modules arranged circumferentially along the tread, each of the modules including: a) a first slanted transverse groove extending from a first shoulder portion in the first half of the tread to a first end located in the second half of the tread; b) a second slanted transverse groove extending from a second shoulder portion in the second half of the tread to a second end located in the first half of the tread; c) a third slanted transverse groove extending from the first shoulder portion to a third end located in the first half of the tread; d) a fourth slanted transverse groove extending from the second shoulder portion to a fourth end located in the second half of the tread; wherein: e) the first end is substantially located at an intermediate portion of the second slanted transverse groove; and f) the second end is substantially located at an intermediate portion of the first slanted transverse groove of a circumferentially adjacent module.

Abstract: A car tyre having a tread that extends in axial direction for a width the tread including a central portion arranged across an equatorial plane, and two lateral portions opposed with respect to the central portion. The central portion is separated from the lateral portions of the tread by two circumferential grooves. The circumferential grooves have a width greater than about 6 mm. The central portion extends in axial direction for a width less than 20% of the width of the tread and includes a plurality of first sipes. Each lateral portion has a width greater than 30% of the width of the tread, and each lateral portion includes, furthermore, a plurality of transversal grooves. The transversal grooves of a lateral portion include at 1east a first inclined length that extends from a zone proximal to the respective circumferential grooves, moving away from the equatorial plane. The first inclined length has an inclination ??60° with respect to equatorial plane. Each lateral portion includes a plurality of sipes.

Abstract: Tire for vehicle wheels includes a tread pattern defined by modules arranged circumferentially along the tread, each of the modules including: a) a first slanted transverse groove extending from a first shoulder portion in the first half of the tread to a first end located in the second half of the tread; b) a second slanted transverse groove extending from a second shoulder portion in the second half of the tread to a second end located in the first half of the tread; c) a third slanted transverse groove extending from the first shoulder portion to a third end located in the first half of the tread; d) a fourth slanted transverse groove extending from the second shoulder portion to a fourth end located in the second half of the tread; wherein: e) the first end is substantially located at an intermediate portion of the second slanted transverse groove; and f) the second end is substantially located at an intermediate portion of the first slanted transverse groove of a circumferentially adjacent module.

Abstract: A motor car tire having a tread includes a central portion situated on either side of an equatorial plane and two shoulder portions. The central portion is separated from the shoulder portions of the tread by two circumferential grooves and has at least one circumferential rib situated between a first and a second circumferential groove. The tread has a solid/void ratio of less than 0.28. The circumferential rib includes transverse grooves which extend over at least 50% of its width. The transverse grooves include at least one curvilinear section, have a width less than that of the circumferential grooves and at least one of the circumferential grooves including the circumferential rib has at least one side wall defining an undulating profile.

Abstract: A tyre for vehicle wheels having a tread pattern includes: a) two circumferential grooves, which define a first and a second shoulder region, and one central region; b) a plurality of asymmetric transverse grooves having a substantially “V” shape, which extend for the whole width of the tread, including an alternate sequence of a first and a second asymmetric transverse groove defining an alternate sequence of a first and a second asymmetric module; and c) a plurality of lateral transverse grooves, which includes one first lateral transverse groove extending for the whole width of the first shoulder region and for a portion of the central region of the first asymmetric modules, and one second lateral transverse groove extending for the whole width of the second shoulder region and for a portion of the central region of the second asymmetric modules.

Abstract: Winter tyre includes a tread band on which a plurality of grooves, blocks and sipes of complex shape are provided, wherein the complex shape of the sipe is defined by a first protuberance having a vertex at a first depth from the tread surface. The vertex is connected to a sipe reference plane via a first connecting surface facing toward a radially outer side of the sipe and a second connecting surface facing toward a radially inner side of the sipe, the first connecting surface being inclined with respect to the plane of reference at an angle of between about 50° and about 90°, and the second connecting surface being inclined with respect to the plane of reference at an angle of between about 0° and about 50°.

Abstract: Winter tyre includes a tread band on which a plurality of grooves, blocks and sipes of complex shape are provided, wherein the complex shape of the sipe is defined by a first protuberance having a vertex at a first depth from the tread surface. The vertex is connected to a sipe reference plane via a first connecting surface facing toward a radially outer side of the sipe and a second connecting surface facing toward a radially inner side of the sipe, the first connecting surface being inclined with respect to the plane of reference at an angle of between about 50° and about 90°, and the second connecting surface being inclined with respect to the plane of reference at an angle of between about 0° and about 50°.

Abstract: The tread band of a tire has two circumferential portions, a central one and an inner intermediate one, respectively, that are subdivided into center and intermediate blocks respectively; an inner-shoulder circumferential portion has first and second inner-shoulder cuts, axially offset from each other and distributed in an alternated sequence, to confine a continuous inner-shoulder rest surface with an undulated course; and an outer intermediate circumferential portion has first and second intermediate cuts, and an outer-shoulder circumferential portion has first and second outer-shoulder cuts. The first and second intermediate cuts and the outer-shoulder cuts, respectively, mutually converge at an angle of about 20° and are axially offset from each other and circumferentially distributed in an alternated sequence, to delimit continuous rest surfaces, an intermediate and outer-shoulder surface respectively, with an undulated course.

Abstract: A motor car tyre having a tread includes a central portion situated on either side of an equatorial plane and two shoulder portions. The central portion is separated from the shoulder portions of the tread by two circumferential grooves and has at least one circumferential rib situated between a first and a second circumferential groove. The tread has a solid/void ratio of less than 0.28. The circumferential rib includes transverse grooves which extend over at least 50% of its width. The transverse grooves include at least one curvilinear section, have a width less than that of the circumferential grooves and at least one of the circumferential grooves including the circumferential rib has at least one side wall defining an undulating profile.

Abstract: A tyre for vehicle wheels having a tread pattern includes: a) two circumferential grooves, which define a first and a second shoulder region, and one central region; b) a plurality of asymmetric transverse grooves having a substantially “V” shape, which extend for the whole width of the tread, including an alternate sequence of a first and a second asymmetric transverse groove defining an alternate sequence of a first and a second asymmetric module; and c) a plurality of lateral transverse grooves, which includes one first lateral transverse groove extending for the whole width of the first shoulder region and for a portion of the central region of the first asymmetric modules, and one second lateral transverse groove extending for the whole width of the second shoulder region and for a portion of the central region of the second asymmetric modules.

Abstract: The tread band of a tyre has two circumferential portions, a central one and an inner intermediate one, respectively, that are subdivided into centre and intermediate blocks respectively; an inner-shoulder circumferential portion has first and second inner-shoulder cuts, axially offset from each other and distributed in an alternated sequence, to confine a continuous inner-shoulder rest surface with an undulated course; and an outer intermediate circumferential portion has first and second intermediate cuts, and an outer-shoulder circumferential portion has first and second outer-shoulder cuts. The first and second intermediate cuts and the outer-shoulder cuts, respectively, mutually converge at an angle of about 20° and are axially offset from each other and circumferentially distributed in an alternated sequence, to delimit continuous rest surfaces, an intermediate and outer-shoulder surface respectively, with an undulated course.