A tire comprises a tread portion comprising a circumferentially arranged blocks divided by lateral grooves. Each block has a block side wall and a block tread. Each lateral groove comprises an axially outer first portion, an axially inner second portion, and a connect portion at which the first portion and the second portion are connected with each other so that each block is provided with a convex corner portion which is convex toward the outside of the block at the connect portion. In the convex corner portion, the block side wall comprises a first side wall extending along the first portion, a second side wall extending along the second portion, and a substantially triangular third side wall intersecting the first side wall, the second side wall and the block tread. The third side wall terminates radially outside the groove bottom of the lateral groove.

A tire tread pattern includes: first sipes in a first land portion between first and second circumferential main grooves; first chamfered surfaces in which a tread surface of the first land portion is inclined toward a first circumferential main groove side in an end portion in a width direction, the first sipes opening to the first chamfered surfaces; second sipes in a second land portion on an opposite side of the first land portion with respect to the second circumferential main groove; and second chamfered surfaces in which a tread surface of the second land portion is inclined toward a second circumferential main groove side in an end portion in the width direction, the second sipes opening to the second chamfered surfaces. The first and second. chamfered surfaces are greater in length in the circumferential direction than in the width direction.

A tread pattern of a tire includes: a circumferential main groove extending in a tire circumferential direction; a plurality of sipes extending in a tire width direction within a region of a land portion in contact in the tire width direction with the circumferential main groove; and a chamfered surface having a tread surface of the land portion inclined toward the circumferential main groove in an end portion in the tire width direction on a circumferential main groove side of the land portion, the chamfered surface being provided in a plurality in the tire circumferential direction, and the sipes opening to the plurality of the chamfered surfaces without reaching a groove wall of the circumferential main groove. The length of the chamfered surface in the tire circumferential direction is greater than the length thereof in the tire width direction.

A tire comprises a tread provided with two edges (25A, 25B) and with a center (C) dividing it into two parts of equal width with sets of blocks (21A, 21B). Each set of blocks (21A, 21B) comprises three zones: at the edge (211), at the center (213) and intermediate (212). Each set of blocks (21A, 21B) comprises a set of chamfers (26A, 26B, 26C) which extends over at least the edge zone (211) and the central zone (213) of the set of blocks (21A, 21B). The width LC1 of the set of chamfers (26A, 26B, 26C) over the edge zone (211) is different from the width LC2 of the set of chamfers (26A, 26B, 26C) over the intermediate zone (212), the widths LC1 and LC2 being comprised between 0.5 mm and 2.5 mm.

A tire comprises a directional tread provided with two edges (25A, 25B) and with a center (C) dividing it into two parts of substantially equal width. The tread comprises, on one of these two parts, blocks (21A, 21B) succeeding one another in a circumferential direction. Each block (21A, 21B) has a leading-edge face (26) and a trailing-edge face (27). The tire comprises, for at least one set of blocks (21A, 21B), at least one set of cavities (29) extending over the trailing-edge face (27) of the set of blocks (21A, 21B). The tread has a bottom surface (24) radially on the inside of the tread, the set of blocks (21A) having a height H, wherein the set of cavities (29) is between the bottom surface (24) of the tread and half of the height H.

A tire tread includes a pair of first circumferential main grooves in a first half-tread region on one side in a tire width direction, a pair of second circumferential main grooves in a second half-tread region, first sipes provided in a first region between the first circumferential main grooves, a circumferential narrow groove having a groove width smaller than a groove width of the first circumferential main groove and extending in the tire circumferential direction within the first region, and sipes in a second region between the second circumferential main grooves, extending in the tire width direction, and closing within the second region. The number of intervals of the second sipes mutually adjacent is larger than the number of intervals of the first sipes mutually adjacent.

Tire with a tread provided with two edges (25A, 25B) and with a centre (C) dividing it into two parts of equal width with sets of blocks (21A, 21B). Each set of blocks (21A, 21B) has three zones: at the edge (211), at the centre (213) and intermediate (212). Each set of blocks (21A, 21B) has a set of chamfers (26A, 26B, 26C) which extends over at least the edge zone (211) and the central zone (213) of the set of blocks (21A, 21B). The width LC2 of the set of chamfers (26A, 26B, 26C) over the intermediate zone (212) is different from the width LC3 of the set of chamfers (26A, 26B, 26C) over the central zone (213), said widths LC2 and LC3 being comprised between 0.5 mm and 2.5 mm.

A tire comprises a tread portion provided with zigzag circumferential grooves and lateral grooves so that hexagonal blocks are formed between the zigzag circumferential grooves. Corners of the hexagonal blocks adjacent to each other through the lateral grooves are partially chamfered to have chamfered parts, with respect to each of the lateral grooves, the chamfered part of the corner of the hexagonal block abutting on the lateral groove on one side in the tire circumferential direction is located in a different position in the longitudinal direction of the lateral groove than the chamfered part of the corner of the hexagonal block abutting on the lateral groove on the other side in the tire circumferential direction.

A tire includes medial knobs and lateral knobs in right and left zones extending around the circumference. The tire includes a central zone in between two arrays of medial knobs. The central zone may include no knobs or knobs with a height less than 50% of the height of the lateral knobs.

A tire includes a tread portion. The tread portion has a main groove extending continuously in a tire circumferential direction, and a land portion adjacent to the main groove. The land portion has lateral grooves extending from the main groove in a tire axial direction. Each of the lateral grooves has a first portion communicating with the main groove, and a second portion connected to the first portion. The first portion has a larger groove width than the second portion and has a smaller groove depth than the second portion.