A tire includes a tread portion including an outboard tread edge, an inboard tread edge, four circumferential grooves between the outboard and inboard tread edges, five land portions divided by the four circumferential grooves, and lateral grooves extending from the inboard tread edge to the crown land portion and terminating within the crown land portion. The four circumferential grooves include an inboard shoulder circumferential groove, an inboard crown circumferential groove, and an outboard crown circumferential groove. The five land portions include an inboard shoulder land portion, an inboard middle land portion, and a crown land portion between the inboard and outboard crown circumferential grooves. The crown land portion is provided with at least one crown sipe extending from the inboard crown circumferential groove or the outboard crown circumferential groove and terminating within the crown land portion, and crosses the axially center position of the crown land portion.

A tire includes a tread portion including first and second tread edges, a first shoulder land portion including the first tread edge, and a first shoulder circumferential groove located inwardly in a tire axial direction of and adjacent to the first shoulder land portion and extending continuously in a tire circumferential direction. The first shoulder land portion is provided with a plurality of first shoulder lateral grooves extending from the first shoulder circumferential groove across the first tread edge, each of the plurality of first shoulder lateral grooves has a pair of first groove walls, and the pair of first groove walls is provided with a pair of first chamfer portions that extends from the first shoulder circumferential groove to a first location beyond the first tread edge.

A tire has a tread portion bound with an intended rotational direction. The tread portion is provided with at least one block. Each block includes a ground contacting surface, which is defined by edges, and side surfaces positioned radially inside the ground contacting surface. The edges include a heel-side edge located on a heel side in the rotational direction and a toe-side side edge extending toward a toe side in the rotational direction from the heel-side edge. The heel-side edge is connected to one of the side surfaces without having a chamfer portion therebetween. At least a toe-side region, which is a region positioned on the toe side in the rotational direction, of the toe-side side edge is connected to the side surfaces each with the chamfer portion therebetween.

A tyre for a motorcycle for rough terrain comprises a tread portion. In a region between at least one of tread edges and a tyre equator, the tread portion is provided with middle blocks, shoulder blocks, and tie bars each connecting between one of the middle blocks and its adjacent one of the shoulder blocks. The shoulder blocks include first shoulder blocks forming the one of the tread edges and second shoulder blocks arranged on an inner side in a tyre axial direction of the one of the tread edges. The tie bars include first tie bars each connecting between one of the middle blocks and one of the first shoulder blocks and second tie bars each connecting between one of the middle blocks and one of the second shoulder blocks.

A pneumatic tire includes two circumferential main grooves disposed in an inner half of a tread developed width in a tire lateral direction; shoulder lug grooves that divide shoulder land portions into shoulder block portions and that each include a see-through portion in the tire lateral direction; center lug grooves dividing a center land portion into a plurality of center block portions; and center sipes having both ends terminated in the center block portions. The center sipe includes at least two sipe portions having different angles via at least one bent portion. An angle θ.sub.1 of at least one sipe portion with respect to a tire equator line satisfies 0°≤θ.sub.1≤15°, and an angle θ.sub.2 of at least the other sipe portion with respect to the tire equator line satisfies 35°≤θ.sub.2≤60°.

A tyre includes a tread portion being provided with a longitudinal groove and a land portion being adjacent to the longitudinal groove. The land portion has a ground contact surface defined between a first circumferential edge located on the longitudinal groove side and a second circumferential edge located on an opposite side to the first circumferential edge. The land portion is provided with first lateral grooves and sipes. The first lateral grooves extend from the first circumferential edge and having inner ends thereof terminating within the land portion. The first lateral grooves are provided with tie-bars on the respective inner ends side, the tie-bars having lengths smaller than lengths of the respective first lateral grooves. The sipes include first sipe elements extending form the second circumferential edge to the respective first lateral grooves and second sipe elements extending on the respective tie-bars.

A tire comprises a tread portion comprising a shoulder land region provided with shoulder lateral grooves and circumferential sipes connecting between the shoulder lateral grooves. The shoulder lateral grooves are each provided with a chamfer. The circumferential sipes are each spaced apart from an axially inner end of the shoulder land region by an axial distance of from 30% to 100% of an axial width of the shoulder land region. The depths of the circumferential sipes are equal to or greater than the groove depths of the shoulder lateral grooves.

A pneumatic tire includes a lug grooves extending in a shoulder region of a tread portion in a width direction up to a sidewall portion, a shoulder block and a side block defined by the lug grooves, in which the side block located outward of the shoulder block in the width direction is ridged higher than the shoulder block, at least a part of the lug grooves being each a closed lug groove closed by a ridge portion provided therein, the ridge portion being continuous to the side block located on both sides of the closed lug groove in the circumferential direction, the ridge portion including a first narrow groove with a smaller groove width and a smaller groove depth than the lug groove, extending in the width direction, and at least one end of the first narrow groove penetrating toward the closed lug groove or the sidewall portion.

In a pneumatic tire, a lug groove is configured so that a portion thereof defining a leading side of a block in a rotation direction is inclined toward a trailing side in the rotation direction as that portion extends outward in a lateral direction from an equator line side. Among small blocks defined in the block by narrow grooves, a small block adjacent to the lug groove defining the leading side of the block in a rotation direction, and to a circumferential main groove defining the equator line side is a leading-side block, and a small block with a portion positioned on a backmost side of the block in the rotation direction is a trailing-side block. Among the small blocks, the trailing-side block has a greater surface area than that of the leading-side block, and intermediate blocks each have a greater surface area than the trailing-side block.

A first land region is defined between a first main groove and a second main groove extending in a tyre circumferential direction. The first land region is provided with a first oblique groove and a second oblique groove. The first oblique groove extends obliquely with respect to a tyre axial direction from the first main groove to have an end portion terminating within the first land region. The second oblique groove extends obliquely with respect to the tyre axial direction from the second main groove to intersect with a middle groove portion of the first oblique groove and terminate there.