Various embodiments of a tire traction element are provided. In one embodiment, a tire traction element is oriented in a circumferential groove of a tire to provide improved snow and/or mud traction. In one embodiment, a tire for a vehicle is provided, comprising: a tread having a circumferential direction, the tread having at least one circumferential groove which extends in the circumferential direction, the at least one circumferential groove having a groove base, and at least one groove sidewall; a plurality of traction elements in the circumferential groove connected to the at least one groove sidewall and the groove base; wherein at least one of the traction elements has a plurality of indentations formed on a radially outermost edge between the base portion and the at least one sidewall portion; and wherein the radially outermost edge has an angle of inclination θ relative to the radial direction.

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 θ1 and θ2 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°≤θ1-θ2≤5°.

A pneumatic tire includes a circumferential main groove extending in a tire circumferential direction and a land portion defined by the circumferential main groove. The circumferential main groove includes a groove opening portion and a groove bottom portion each having a zigzag shape or a wave-like shape with an amplitude in a tire width direction. An outer maximum amplitude position of an outer edge portion in the groove opening portion is disposed to be offset in a tire circumferential direction with respect to an outer maximum amplitude position of an outer edge portion of the corresponding groove bottom portion.

A pneumatic tire includes a tread portion provided with at least one circumferentially extending main groove, and at least one lateral groove extending from the main groove. The at least one lateral groove comprises a bottom, and at least one stepwise groove wall that includes at least one level part, wherein the number of level part is not more than three. In a cross-sectional view of the lateral groove, a depth Da from a ground contacting surface of the tread portion to a radially innermost level part is in a range of from 50% to 80% a maximum groove depth D4 of the lateral groove, and a width Wa from the radially innermost level part to a groove edge of the stepwise groove wall measured along in a groove width direction is in a range of from 50% to 150% the depth Da.

A tire comprises a tread portion for which an intended tire rotational direction is specified. The tread portion comprises rows composed of blocks circumferentially divided by lateral grooves. Each block has a ground contacting top surface, and a first side wall surface and a second side wall surface located on a heel-side and a toe-side, respectively, in the intended tire rotational direction. In a cross section of each block which is parallel with the tire circumferential direction, the first and second block-side wall surfaces are both inclined, and the angle θ2 of the second side wall surface is larger than the angle θ1 of the first side wall surface with respect to the tire radial direction. The difference θ2−θ1 between the angles θ2 and θ1 increases toward one side in the tire axial direction.

A tire includes a reinforcing rib formed on a groove to prevent irregular wear of a tread and including an auxiliary hidden groove formed in the groove to enhance capabilities of water absorption and drainage of the tire even when the reinforcing rib is formed on the groove. The tire can include a reinforcing rib coupled to a first sidewall, which is one of both sidewalls forming the groove, and protruding toward the groove from the first sidewall, a hidden groove formed in one portion of a second sidewall which is the other of the sidewalls forming the groove, and a remaining tread part protruding toward the groove from a side surface of the hidden groove, the remaining tread part being the other portion of the second sidewall.

A pneumatic tire comprises a tread portion 2 provided with shoulder axial grooves 10 extending from a shoulder main groove 3 to a tread edge Te while inclining to a first-side in the tire circumferential direction. The shoulder axial groove 10 has a first-side groove edge, a second-side groove edge, a first-side groove-sidewall 14 extending radially inward from the first-side groove edge 12, and a second-side groove-sidewall 15 extending radially inward from the second-side groove edge 13. The shoulder axial groove 10 has a part where the inclination angle β of the first-side groove-sidewall 14 with respect to a normal line passing through the first-side groove edge 12 perpendicularly to the tread surface 2s is more than the inclination angle α of the second-side groove-sidewall 15 with respect to a normal line passing through the second-side groove edge 13 perpendicularly to the tread surface 2s.

This disclosure aims to provide a tire having excellent braking performance on dry road surface and on wet road surface, and having excellent steering stability. This disclosure is a tire comprising a tread 10, wherein: the tread 10 has a plurality of circumferential grooves extending continuously in a tire circumferential direction C, the circumferential grooves including circumferential main grooves 21a, 21b, 22 with a cross-sectional area in a tire width direction W of 10 mm.sup.2 or more, and a groove width Lb at a 95% groove depth position with a groove depth of a groove bottom as 100% of at least the circumferential groove 21a located on an outermost side when mounted to a vehicle among the circumferential main grooves 21a, 21b, 22 being 25% to 60% with respect to a groove width Lt on a tread surface.

A pneumatic tire includes a plurality of main grooves formed in a tread and extending along a tire circumferential direction, wherein the plurality of main grooves include a shoulder main groove located on an outermost side in a width direction, the shoulder main groove includes a raised portion formed by raising a first side, in the tire width direction, of a groove bottom of the shoulder main groove more than a second side of the groove bottom, and the raised portion is lower than an outer surface of the tread and continuously extends over an entire circumference in the tire circumferential direction.

A tire including a plurality of block patterns, wherein the plurality of block patterns may repeat around a circumference of the tire. The tire may further include a three dimensional chambered groove in the plurality of block patterns. The tire may further include a plurality of independent pattern blocks.