A pneumatic tire has paired bead portions, paired sidewall portions, a tread portion, a plurality of lug grooves extending from a shoulder area of the tread portion to reach a buttress area of the sidewall portion, and a block defined by the plurality of lug grooves. The block includes a shoulder block provided in the shoulder area and a buttress block provided in the buttress area. At least some of the plurality of lug grooves end at a connecting portion connecting the paired buttress blocks, the connecting portion is provided on an inner side in the tire diametrical direction of position that are 50% of length in the tire diametrical direction of the buttress block from upper end position of the buttress block. A step or a protrusion where the buttress block has a largest upraised height is provided in the tire diametrical position of the connecting portion.

A motorcycle tire includes a tread portion including a crown portion that is a region of 50% of a tread development width centered on a tire equator, a first shoulder portion that is an outer region of the crown portion, and first lateral grooves. Each lateral groove includes a first groove portion in the crown portion, a second groove portion in the first shoulder portion, and a third groove portion connecting the first and second groove portions. A groove depth and a groove width of the third groove portion are respectively smaller than groove depths and groove widths of the first groove portion and the second groove portion, respectively. More than 80% of a tire axial length of the third groove portion is in the first shoulder portion.

A pneumatic tire has paired bead portions, paired sidewall portions, a tread portion, a plurality of lug grooves extending from a shoulder area of the tread portion to reach a buttress area of the sidewall portion, and a block defined by the plurality of lug grooves. The block includes a shoulder block provided in the shoulder area, and a buttress block provided in the buttress area. The buttress area is provided with an annular rib annularly extending along a tire circumferential direction. The lug grooves are comparted into an outside lug groove positioned in an outer side of the annular rib, and an inside lug groove positioned in an inner side of the annular rib. A widened portion is provided in at least part of the plurality of lug grooves so as to enlarge a width of the annular rib.

A tyre for a motorcycle includes a tread portion. The tread portion includes a crown longitudinal groove extending in a tyre circumferential direction on a side of a tyre equator, a shoulder longitudinal groove extending in the tyre circumferential direction on a side of a first tread edge, and a middle groove arranged between the crown longitudinal groove and the shoulder longitudinal groove. The middle groove includes a plurality of middle main groove portions arranged in the tyre circumferential direction and each protruding toward the tyre equator or the first tread edge. Each of the middle main groove portions is formed in a bent line shape or in an arc shape. Each of the middle main groove portions includes a shallow bottom portion having a groove depth smaller than a maximum groove depth of the shoulder longitudinal groove and a maximum groove depth of the crown longitudinal groove.

In a tire meridian cross-section in a 5% internal pressure state of a heavy duty tire, a first radius of curvature of a first ground-contact surface profile of each of a center land portion, an inner region of a first middle block, an outer region of the first middle block, and a first shoulder block can be defined. In addition, a ratio (Wa/Da) of a groove width Wa to a groove depth Da of a center circumferential groove may not be larger than 0.25. Furthermore, a ratio (Lb/La) of a maximum length Lb in a tire axial direction to a maximum length La in a tire circumferential direction in the first middle block can be defined.

A tire has a block pattern. The block pattern includes a plurality of linked block pairs. Each linked block pair includes two blocks 28 and a tie bar 30 interposed between the two blocks 28 and linking the two blocks 28 together. The tie bar 30 has a toe end 40 having a height equal to or smaller than a height of the blocks 28 and a heel end 38 having a height smaller than the height of the toe end 40.

A tire includes a main groove extending in a circumferential direction, a lug groove extending in a width direction, a land portion defined by the main groove and the lug groove, and a sipe that is a narrow groove that is formed in the land portion, extends in the width direction, and includes an end opening to the main groove. The lug groove includes a raised bottom portion formed in a central region of the land portion in the width direction. The sipe includes shallow and deep bottom portions having different depths from a tread contact surface. A deep bottom portion depth from the tread contact surface is greater than a shallow bottom portion depth and includes at least a part disposed in the central region. The raised bottom portion and the deep bottom portion are disposed overlapping each other in the circumferential direction.

A tire comprises a tread portion including a shoulder land portion. The shoulder land portion is provided with shoulder lateral grooves extending from a shoulder circumferential groove to a first tread edge to divide the shoulder land portion into shoulder blocks. The axial width of the ground contacting top surface of each shoulder block is 35% to 48% of a half tread width from the tire equator to the first tread edge. The ground contacting top surface of each shoulder block is provided with only one or more shoulder sipes extending in a tire circumferential direction.

A pneumatic tire includes a main groove, a first block line provided on one side in a width direction of the main groove, and a second block line provided on the other side in the width direction of the main groove. A first block included in the first block line has a first acute angle portion sectioned at an acute angle by the main groove and a first lateral groove, and a first reinforcing protrusion protruding from the first acute angle portion side of a side wall facing the main groove to the main groove. A second block included in the second block line has a second acute angle portion sectioned at an acute angle by the main groove and a second lateral groove, and a second reinforcing protrusion protruding from the second acute angle portion side of a side wall facing the main groove to the main groove.

In a tire, width direction edges of lands corresponding to edges of lug grooves include width direction bent portions bent in a circumferential direction. Width direction bent portions closest to a land center portion line and disposed on outer and inner sides in a width direction are outer and inner bent portions, respectively. The lands have a width w1 in the width direction from the outermost side position to the outer bent portion of the lands in the width direction and a width w2 in the width direction from the innermost side position to the inner bent portion of the lands in the width direction, the widths w1, w2 satisfying w2<w1, and a maximum width wb of the lands in the width direction and a width wc between the outer bent portion and the inner bent portion in the width direction satisfy 0.2≤(wc/wb)≤0.6.