A pneumatic tire is provided with a pair of shoulder lands, and each of the shoulder lands has arranged therein shoulder lug grooves and first sipes. The opposite ends of each of the first sipes terminate within a shoulder land, and the outer end of the first sipe in the axial direction of the tire is located on the inside of a ground contact end of the tread in the width direction of the tire. The sum of the lengths of the first sipes provided in the shoulder land located facing the inside of a vehicle when the tire is mounted on the vehicle is greater than the sum of the lengths of the first sipes provided in the shoulder land located facing the outside of the vehicle. The shoulder land located facing the inside of the vehicle is provided with second sipes extending in the circumferential direction of the tire on the inside of the first sipes in the axial direction of the tire.

A tire comprises a tread portion provided with two circumferential grooves disposed one each side of the tire equator and extending continuously in the tire circumferential direction, and a crown land region between the two circumferential grooves. The crown land region is provided with first crown sipes extending from one of the circumferential grooves and terminating within the crown land region, and second crown sipes extending from the other circumferential groove and terminating within the crown land region.

A pneumatic tire 1 is provided in the tread portion 2 with blocks each provided with sipes 9 extending across the entire axial width of the block. The blocks include axially innermost first blocks 3 each having a longitudinal block rigidity (G), and axially outer blocks 4 each having a longitudinal block rigidity (G). The longitudinal block rigidity (G) of the axially innermost first blocks 3 is 90% to 110% of the longitudinal block rigidity (G) of the axially outer blocks 4.

In a pneumatic tire in which plural land sections 20 are provided in a tread and each of the land sections 20 is provided with plural sipes 30 and at least one recess 32 arranged between the two adjacent sipes 30, in the case where a distance between the sipes 30 on both sides of the recess 32 is set as W1, a distance between the recess 32 and one of the sipes 30 is set as W2, and a distance between the recess 32 and the other sipe 30 is set as W3, each of W2/W1 and W3/W1 is equal to or greater than 0.1 and equal to or less than 0.3.

A tread for a tire includes a first circumferential groove extending in a circumferential direction of the pneumatic tire, a second circumferential groove extending in the circumferential direction of the pneumatic tire, a third circumferential groove extending in the circumferential direction of the pneumatic tire, and a fourth circumferential groove extending in the circumferential direction of the pneumatic tire. The first, second, third, and fourth circumferential grooves defining first, second, third, fourth, and fifth ribs. The first and fifth ribs include lateral grooves and incisions extending circumferentially fully around the first and fifth ribs. The incisions of the first and fifth ribs reduce noise generated by the tread under operating conditions.

A snow tire tread having a plurality of blocks separated by grooves and provided with sipe incisions dividing into several parts from a certain depth onwards, (complex sipes each having, when viewed in cross section, a rectilinear first part extending radially from the tread surface of the tread, and a second part extending the first part and comprising at least two branches each having an end. The tread has cavities each extending between the branches of a complex sipe and having a bottom situated at the same level as the ends of the branches. The cavities and the grooves of the tread are configured so that this tread has a voids surface ratio at the end of wear greater than or equal to 35%. Furthermore, the distance (D) between two branches of two adjacent complex sipes is at least equal to 2 mm.

A heavy-duty tire includes a tread portion including a pair of tread edges and a tire equator located therebetween. In a tire cross-section including a tire axis under a 5% inner pressure condition where the tire is mounted on a standard wheel rim with 5% of a standard pressure but loaded with no tire load, the tread portion has a profile which includes a first profile including the tire equator, a pair of second profiles extending axially inwardly from the tread edges and a pair of third profiles connecting the first profile and the respective second profiles. The first profile and the second profiles are configured as arc shapes protruding outwardly in a tire radial direction, and the third profiles are configured as straight shapes.

Technique to increase the endurance of tires comprising two crossed working layers (41, 42), comprising mutually parallel reinforcing elements that form, with the circumferential direction (XX) of the tire, an angle which is at least equal to 20 and at most equal to 50. The reinforcing elements are made up of individual metal threads or monofilaments having a cross section which is at least equal to 0.20 mm and at most equal to 0.5 mm. The tire also comprises axially exterior sipes (24) having a mean width W at most equal to 1 mm, of a depth D at least equal to 5 mm and spaced apart, in the circumferential direction (XX), by a circumferential spacing P at least equal to 4 mm, and axially exterior grooves (25) having a mean width W at least equal to 1 mm, of a depth D at most equal to 5 mm.

A pneumatic tire, includes: a lug groove outermost in a lateral direction in a tread portion, the lug groove opening outward in the lateral direction; and a projection portion outward of an opening portion of the lug groove in the lateral direction, the projection portion extending outward in a radial direction past a groove bottom of the lug groove at maximum groove depth and including an end inward of a road contact surface of the tread portion in the radial direction, when the pneumatic tire is inflated to a regular internal pressure and loaded with 70% of a regular load; the projection portion including a body projecting from a tire surface, and an end projection extending from the end of the body with a step portion as an interface, and the end projection having a thinner meridian cross-sectional width than a meridian cross-sectional width of the end of the body.

A pneumatic tire, includes: an annular-shape tread portion; a sidewall portions; and bead portions. JIS hardness of tread rubber is within a range of 40 to 60 and snow traction index is 180 or higher. A rib positioned between circumferential grooves is demarcated in a center region of the tread portion. Closed grooves are formed in the rib. The closed grooves are inclined with regard to a tire axial direction such that a closed end faces a leading side. A groove wall of the closed groove on the leading side protrudes more outward in the tire axial direction than a groove wall on a trailing side. A difference between angles ?1 and ?2 of the groove walls on the leading and trailing sides of the closed grooves, respectively, with regard to the tire axial direction is within a range of 0???1-?2?5?.