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 method for producing a mold segment component of a vulcanizing mold for a pneumatic vehicle tire for forming at least one profile block or a region structured in a block-like manner of an altogether curved tread, with a tread outer surface, which mold segment component is built up by means of an additive process, such as selective laser melting, by layer-by-layer planar application and melting of a metal powder on a planar building plate (10) together with a bottom part (7b) and mold elements, such as lamellae (4) and/or microlamellae (11) and/or ribs and/or regions of ribs, wherein mold elements delimit or run around mutually adjacent mold area elements (12) of the bottom part (7b) which have outer surfaces (12a) forming a region of the tread outer surface.

In the additive build-up operation, the mold area elements (12) are each additively built up with a unitary planar outer surface (12a) or with two to three planar outer surfaces (12a) running in a stepped manner in relation to one another, wherein all of the outer surfaces (12a) of the mold area elements (12) run parallel to one another and, with respect to the building plate (10), are surfaces at different levels such that the mutual arrangement of the outer surfaces (12a) of the mold area elements (12) largely approximates to the curvature of the region to be formed of the tread outer surface.

In a pneumatic tire including a tread portion, a sidewall portion, a bead portion, a carcass layer mounted between a pair of bead portions, a plurality of main grooves extending in the tire circumferential direction and formed in the tread portion, and a plurality of land portions defined by the main grooves, the carcass layer includes a carcass cord formed of a polyester fiber cord, an elongation at break of the carcass cord is from 20% to 30%, and a groove area ratio SgA in a ground contact region of the tread portion is from 20% to 40%, a groove area ratio SgB in a center region of the tread portion satisfies a relationship 1.1≤SgB/SgA≤1.5, and a depth of the main groove included in the center region is from 5 mm to 8 mm.

A tread (2) for the driven axle of an agricultural vehicle having tread pattern elements (21, 41) extending radially towards the outside from a bearing surface (22). The tread pattern elements have, in the central part of the tread, a series of blocks (41) juxtaposed with one another in the longitudinal direction and separated by transverse cuts (42), and having, in the rolling direction (15), a leading face, a contact face and a trailing face. The leading face having a radial height greater than the radial height of the trailing face. The contact face being oriented at an angle α with respect to radial direction Z, α being between 93 and 105° and radial depth PR of the transverse cuts (42) being at least 50% of the radial height of the leading face, the width of the blocks representing at least 15% of the width of the tread.

The tire includes a tread portion having a plurality of circumferential grooves and land regions. The land regions include a crown land region and a first middle land region. The crown land region has a plurality of crown lateral grooves. The first middle land region has a plurality of first middle lateral grooves. In a tread plan view, an angle between a first linear line connecting both ends of each of the crown lateral grooves and a second linear line connecting both ends of a respective one of the first middle lateral grooves is 90 degrees or more and 150 degrees or less. Each of the crown lateral grooves includes a first end portion, a second end portion, and a center portion. The center portion has a groove width smaller than a groove width of the first end portion and a groove width of the second end portion.

Provided is a pneumatic tire. A chamfered portion and a non-chamfered portion are provided in each of an edge on a leading side and an edge on a trailing side of a sipe. In a meridian cross-sectional view, a profile line of a rib projects further to an outer side in a tire radial direction than a reference tread profile line. A radius of curvature TR of the reference tread profile line and a radius of curvature RR of the profile line satisfy a relationship of TR>RR. The chamfered portions on both the leading side and the trailing side are disposed so as to straddle a maximum projection position. A maximum projection amount D of the rib with respect to the reference tread profile line and a maximum width W of the chamfered portion satisfy a relationship of 0.05 mm.sup.2<W×D<1.50 mm.sup.2.

A tread of a tire includes a plurality of blocks including a center block located on an equator plane and a side block located outward of the center block in an axial direction. Each of the plurality of blocks includes a land surface that forms a part of a tread surface. In the tread surface, a total area of the land surfaces is smaller than a total area of a portion other than the land surfaces. A complex elastic modulus at a maximum strain amplitude of 1% and a temperature of 70° C. of each block is not less than 10.0 MPa. A 300% modulus at a temperature of 75° C. of each block is not greater than 6.0 MPa.

Provided is a pneumatic tire capable of providing improved steering stability performance on dry road surfaces and improved steering stability performance on wet road surfaces in a compatible manner. A chamfered portion (12A, 12B) and a non-chamfered portion (13A, 13B) are provided in each of an edge (11A) on a leading side and an edge (11B) on a trailing side of a sipe (11). In a meridian cross-sectional view, a profile line (PL1) of a rib (10) projects further to an outer side in a tire radial direction than a reference tread profile line (PL0). A radius of curvature TR (mm) of the reference tread profile line (PL0) and a radius of curvature RR (mm) of the profile line (PL1) satisfy a relationship of TR>RR. Only one of the chamfered portions (12A, 12B) on the leading side and the trailing side is disposed so as to straddle a maximum projection position (P). A maximum projection amount D (mm) of the rib (10) with respect to the reference tread profile line (PL0) and a maximum width (W) (mm) of the chamfered portion (12A, 12B) satisfy a relationship of 0.05 mm.sup.2<W×D<1.50 mm.sup.2.

Provided is a pneumatic tire capable of providing improved steering stability performance on dry road surfaces and improved steering stability performance on wet road surfaces in a compatible manner. A sipe (12) includes at least one end communicating with a main groove (9) and a chamfered portion (13) in at least one edge, and the chamfered portion (13) includes at least one end open to the main groove (9). In a meridian cross-sectional view, a profile line (L1) projects further to an outer side in a tire radial direction than a reference tread profile line (L0). A radius of curvature (TR) (mm) of the reference tread profile line (L0) and a radius of curvature (RR) (mm) of the profile line (L1) of a rib (10) satisfy a relationship of TR>RR. The chamfered portion (13) is disposed straddling a maximum projection position (P) of the profile line (L1) of the rib (10). A maximum projection amount (D) (mm) of the rib (10) with respect to the reference tread profile line (L0) and a maximum width (W) (mm) of the chamfered portion (13) satisfy a relationship of 0.05 mm.sup.2<W×D<1.50 mm.sup.2.

A tire 1 comprises a tread portion 2 provided with a plurality of blocks 5 arranged therein. The blocks 5 include at least one first block 20 comprising a first part 6 arranged on one side in a tire circumferential direction and a second part 7 arranged on the other side in the tire circumferential direction. The first part 6 extends in the tire circumferential direction with a substantially constant width (Wa) in a tire axial direction. The second part 7 has a width (Wb) in the tire axial direction larger than that of the first part 6 so that the second part 7 protrudes axially outwardly from the first part 6 so as to protrude more toward one side in the tire axial direction.