A heavy duty tire comprises a tread portion 2 divided into two crown land regions 6, two middle land regions 7 and two shoulder land regions 8 by a center circumferential groove 3 having a width Wc, two middle circumferential grooves 4 having a width Wm and two shoulder circumferential grooves 5 having a width Ws. The distance LA from the shoulder circumferential groove 5 to the tire equator Co is more than the distance LB from the shoulder circumferential groove 5 to the tread edge TE. The width Wc and width Wm are more than 3.0 mm and less than 6.0 mm. The width Ws is more than 5.0 mm, and more than the width Wc and more than the width Wm. The crown and middle land regions 6 and 7 are each formed as a rib. The shoulder land regions 8 are each formed as a row of shoulder blocks 13.

Provided is a motorcycle tire that further improves wet grip performance during turning while ensuring rigidity during turning. Provided is a motorcycle tire in which: a tread portion is composed of a central rubber (11C) and a both-side rubber (11S) having a lower modulus than the central rubber (11C); the both-side rubber extends from the tire equator to from to of the half width of the peripheral length; on a tire grounding portion, a first groove, a second groove and a third groove are included; a first bent portion, a second bent portion and a third bent portion of the first groove, an inner side end in the width direction of the second groove, and an inner side end in the width direction and an outer side end in the width direction of the third groove are positioned at from to , from 1/16 to 3/16, from 3/16 to 5/16, from to , from 1/16 to 3/16, and from to , respectively, of the half width of the peripheral length from the tire equator; and angles formed by a first groove portion, a second groove portion, a third groove portion, a fourth groove portion, the second groove, a fifth groove portion, and a sixth groove portion with respect to the circumferential directions are from 35 to 45, from 55 to 65, from 20 to 30, from 55 to 65, from 55 to 65, from 55 to 65, and from 15 to 25, respectively.

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.

A pneumatic radial tyre includes a plurality of shoulder lateral grooves crossing shoulder lard regions. In a cross-sectional view of at least one of the shoulder lateral grooves taken along a groove width center line thereof, a groove bottom of the shoulder lateral groove includes a first bottom surface portion arranged on an inner side in a tyre axial direction and a second bottom surface portion extending between the first bottom surface portion and the tread surface outer end in a concave arc shape having a radius of curvature.

A tire includes, in a tread portion, a pair of shoulder main grooves, a crown region between the shoulder main grooves, and shoulder regions disposed outside of the shoulder main grooves in a tire axial direction. Land ratios of the crown region and the shoulder regions are respectively 40%-60%. In the crown region, a plurality of middle blocks are arranged on both sides of a tire equator, and each middle block has a longitudinal shape in which a length in the tire circumferential direction is larger than a length in the tire axial direction.

A tire has a lug, a plurality of first recessed regions that extend from a first major groove, and a plurality of second recessed regions that extend from a second major groove. A central region of the lug protrudes relative to either end of the lug. The plurality of first and second recessed regions are arranged in alternating fashion along a tire circumferential direction. The respective recessed regions each has a planar base that extends in a width direction of the each recessed region. The planar base is horizontal, or is inclined in such fashion that a height thereof increases so as to extend further toward an exterior in a tire radial direction as one proceeds toward a center of the each recessed region. Width of the planar base increases as one proceeds from the center in the width direction of the lug to an end of the lug.

A tyre includes a tread portion provided with an outer main groove, an inner main groove, and a middle main groove. Each of the main grooves has a pair of groove edges arranged on both sides in a tyre axial direction and extending in a tyre circumferential direction. At least one of the groove edges includes circumferential portions extending in the tyre circumferential direction and axial portions inclined at larger angles than the circumferential portions with respect to the tyre circumferential direction. When an axial portion total length is a sum of axial lengths of the axial portions included in the main grooves, an axial portion total lengths L1, L2, and L3 of the outer main groove, the middle main groove, and the inner main groove, respectively, satisfy Expressions (1) and (2) shown below;

L1>L3Ex. (1)

L1L2L3Ex. (2).

In this pneumatic tire, width direction sipes (9) on one side in the tread circumferential direction are shifted in position in a central land portion row (3a) and intermediate land portion rows (3b1, 3b2), first and second width direction grooves (4a, 4b) and the width direction sipes (9) on the one side are shifted in position in the tread circumferential direction in the central land portion row (3a), minute blocks (9a) in the central land portion row (3a) are aligned in position in the tread circumferential direction with minute blocks (9a) or third width direction grooves (4c1, 4c2) in the intermediate land portion rows (3b1, 3b2), and fifth width direction grooves (10a, 10b) and width direction shallow grooves (11a, 11b) are aligned in position in the tread circumferential direction with fourth width direction grooves (4d1, 4d2) or minute blocks (9a) in the intermediate land portion rows (3b1, 3b2).

Provided is a pneumatic tire. In shoulder regions of a tread portion, as shoulder blocks, inner blocks and outer blocks, which have outer edges in a tire lateral direction at different positions on a tread contact surface, are alternately disposed in a tire circumferential direction. In shoulder grooves disposed between the inner blocks and outer blocks adjacent to each other in the tire circumferential direction, groove bottom protrusions, which extend from a laterally inner side to a laterally outer side in the tire lateral direction along the shoulder grooves over the positions of the outer edges of the inner blocks, are provided. Broad width portions having a relatively broad protrusion width of the groove bottom protrusions are disposed on a laterally outer side in the tire lateral direction with respect to the outer edges of the inner blocks in a front view.

A heavy duty pneumatic tire comprises a tread pattern that comprises: circumferential main grooves with a wave-like shape, shoulder lug grooves extending in the tire width direction to a ground contact edge and connecting to the circumferential main grooves at first groove turning portions that protrude outward; center lug grooves connecting to the circumferential main grooves at second groove turning portions that protrude inward; and center blocks defined by adjacent center lug grooves of the center lug grooves adjacent in the tire circumferential direction and the circumferential main grooves, forming a row in the tire circumferential direction. The center lug grooves and the circumferential main grooves have a narrower groove width than the shoulder lug grooves; and each region of the center blocks includes two first narrow grooves having a curved line shape with no bent portions and having a narrower groove width than the shoulder lug grooves.