Abstract: A heavy truck tire directional tread is provided that has two successive asymmetrical sipes (14) in the longitudinal direction that share at least some of the same offset from a tread edge in the lateral direction. Each of the two asymmetrical sipes (14) has a body (28) and a tear drop (30). The surface of the bottom of the sipe (14) has a radius of curvature that is not the same along the entire surface of the bottom. The geometry of the sipes resists crack initiation and propagation and is governed by the equation RA.B-avg>1-4×Rref, wherein Ra.B-avg is the average radius of a particular portion of the bottom of the sipe, and Rref is a reference radius of the bottom of the sipe.

Abstract: The invention provides for a heavy truck tire tread (2) having a longitudinal direction (X), a lateral direction (Y) and a thickness direction (Z), said tread comprising: longitudinal grooves (20) separating longitudinal ribs; a pair of opposing tread edges (21, 21?) spaced apart along the lateral direction; a pair of shoulder ribs (22, 22?), each shoulder rib being adjacent to a respective tread edge of said pair of tread edges; wherein the shoulder ribs are solid ribs comprising lateral full depth sipes (23, 23?) running at a sipe angle (?) relative to the lateral direction (Y) and; wherein an average sipe angle (?A) over a center portion of said shoulder ribs is greater than 30° in absolute value.

Abstract: A tread (10) for a heavy truck tire is provided that has an upper surface for engaging the ground, a leading edge, and a trailing edge forward of the leading edge in a rolling direction. The tread also has a J shaped sipe (30) that has a main portion (32) that extends from the upper surface. The main portion (32) has an opening at the upper surface and a bottom end (36) opposite the opening in a radial direction. A curved portion (38) extends from the bottom end (36) and has a bottom curved wall (40) that has a radius (r1). The curved portion (38) extends from the bottom end (36) forward in the rolling direction (24), and has a curved portion end (42).

Abstract: A tread (12) for a heavy truck tire is provided that has a bottom surface (14), a shoulder rib (16), and a sacrificial rib (20) located outboard from the shoulder rib (16) in a width direction. A decoupling void (30) is located between the shoulder rib (16) and the sacrificial rib (20). A decoupling void sipe (32) is in the shoulder rib (16) and opens at the shoulder rib upper surface (18) and at the decoupling void (30). The decoupling void sipe (32) extends in the thickness direction and is closer to the bottom surface (14) than the decoupling void (30) in the thickness direction.

Abstract: A heavy truck tire directional tread is provided that has two successive asymmetrical sipes (14) in the longitudinal direction that share at least some of the same offset from a tread edge in the lateral direction. Each of the two asymmetrical sipes (14) has a body (28) and a tear drop (30). The surface of the bottom of the sipe (14) has a radius of curvature that is not the same along the entire surface of the bottom. The geometry of the sipes resists crack initiation and propagation and is governed by the equation RA.B-avg>1-4×Rref, wherein Ra.B-avg is the average radius of a particular portion of the bottom of the sipe, and Rref is a reference radius of the bottom of the sipe.

Abstract: The present invention provides for a truck tire tread (2) that has a shoulder area having a lateral sipe (23). The lateral sipe (23) has an average sipe line oriented at an average sipe angle greater than 20 degrees in absolute value oriented to the lateral direction (Y) running inboard to outboard. The lateral sipe (23) is also inclined such that a sipe inclination line miming from a sipe bottom point (31) to a sipe top point (32) in a reference plane perpendicular to the average sipe line is at a sipe inclination angle (35) from 10 to 50 degrees to a reference line oriented only in a thickness direction (Z) of the tread. The lateral sipe is inclined such that the sipe bottom point is configured to approach a contact patch before the sipe top point.

Abstract: The invention provides for a heavy truck tire tread having a longitudinal direction, a lateral direction and a thickness direction, said tread comprising : a pair of opposing tread edges (21, 21?) spaced apart along the lateral direction; a tread region extending between the tread edges over a rolling tread width (RTW); a shoulder zone (SZ) adjacent to each tread edge of said pair of opposing tread edges and extending over a lateral length of 10% of the rolling tread width (RTW); and a center zone (CZ) defined between said shoulder zones; wherein the tread region comprises a plurality of ribs (23) separated by grooves (22), said grooves running continuously from the center zone toward each of said tread edges at a groove angle relative to the lateral direction and extending out to the respective tread edge; and wherein a shoulder zone average groove angle is greater than 45° in absolute value; the shoulder zone average groove angle is greater than a center zone average groove angle in absolute values; and the

Abstract: The invention provides for a heavy truck tire tread (1) having a longitudinal direction, a lateral direction and a thickness direction, said tread having a ground-engaging contact surface (CS) and comprising at least four main longitudinal grooves (3, 4, 5, 6) defining at least five main longitudinal ribs (9, 10, 11, 12, 13), the at least four main longitudinal grooves comprising at least one and not more than three open grooves (3, 6) and at least two partially hidden grooves (4, 5), each of said at least two partially hidden grooves comprising openings (41, 51) to the ground-engaging contact surface (CS) and an undersurface channel (42, 52) that is connected to the openings by ducts (43, 53) extending substantially in the thickness direction, longitudinal sipes (44, 54) extending substantially along the longitudinal direction connecting successive openings to the channel, said tread comprising at least two non-shoulder main ribs (10, 11, 12), said at least two non-shoulder main ribs comprising lateral sipes

Abstract: A tire is provided having a tread region that includes continuous ribs which extend diagonally across the transverse direction of the tire. Partial sipes are provided at the trailing edges of the ribs. Full sipes can also be provided with the partial sipes. The ribs may form various patterns such as e.g., an S-shaped pattern, chevron pattern, and others. The tire provides improved traction performance over non-diagonal ribs while still providing desirable rolling resistance performance and control of irregular wear.

Abstract: A tire is provided having a tread region that includes continuous ribs which extend diagonally across the transverse direction of the tire. Partial sipes are provided at the trailing edges of the ribs. Full sipes can also be provided with the partial sipes. The ribs may form various patterns such as e.g., an S-shaped pattern, chevron pattern, and others. The tire provides improved traction performance over non-diagonal ribs while still providing desirable rolling resistance performance and control of irregular wear.