A non-pneumatic tire includes: an inner annular portion; an outer annular portion provided concentrically on an outer side of the inner annular portion; a plurality of coupling portions coupling the inner annular portion and the outer annular portion to each other; a tread provided on an outer side of the outer annular portion; and a groove formed on the tread, wherein the groove includes a protrusion protruding inward of the groove from a groove sidewall.

A heavy duty pneumatic tire in which occurrence of uneven wear is inhibited is provided. In the tire, each shoulder land portion includes a groove wall portion forming a wall of a shoulder circumferential groove, and a cap portion located outward of the groove wall portion in an axial direction. A wear resistance index of the groove wall portion is lower than a wear resistance index of the cap portion. A ratio of a distance in the axial direction from an outer edge of the shoulder circumferential groove to a boundary between the groove wall portion and the cap portion on an outer surface of the shoulder land portion, to a width in the axial direction of the shoulder land portion, is not less than 20% and not greater than 30%.

A tire comprises a tread portion provided with at least one longitudinal groove extending in a tire circumferential direction. The longitudinal groove has a groove bottom surface and a pair of groove wall surfaces extending outwardly in a tire radial direction from the groove bottom surface. The groove bottom surface is provided with a groove bottom protruding portion protruding outwardly in the tire radial direction. At least one of the pair of the groove wall surfaces is provided with a groove wall protruding portion protruding toward a side of a groove center of the longitudinal groove.

A tire comprises a tread portion 2 comprising a shoulder main groove 5 extending on a side of a tread edge Te and comprising inner and outer groove walls 11 and 12. The inner groove wall 11 has an angle 1 with respect to a tread normal line in a cross section of the shoulder main groove 5 periodically increasing and decreasing in a tire circumferential direction so as to comprise concave and convex wall portions 16 and 17 arranged alternately in the tire circumferential direction. The outer groove wall 12 has an angle 2 with respect to a tread normal line in the cross section periodically increasing and decreasing in the tire circumferential direction so as to comprise convex and concave wall portions 22 and 21 arranged alternately in the tire circumferential direction. The angle 2 is larger than the angle 1 in any cross section of the groove.

A tire has a first rib, a second rib and a third rib. The second rib and the third rib are adjacent to the first rib. The first rib has a first closed sipe that terminates within the first rib. The second rib has a second closed sipe that terminates within the second rib. The third rib has a third closed sipe that terminates within the third rib. The second closed sipe and the third closed sipe are inclined in mutually similar fashion with respect to the tire width direction. The first closed sipe is inclined in opposite fashion with respect to the tire width direction as the second closed sipe and the third closed sipe are inclined with respect to the tire width direction.

A tread (10) for a heavy truck tire having a groove (14) with a bottom (16) and a stone ejector (18) located within the groove (14) that extends upwards from the groove bottom (16) wherein the stone ejector (18) has a front side (20), a back side (22) and an upper surface (24) that extends at different distances upwards at different locations on the upper surface (24) such that a first location (26) on the upper surface (24) is located closer to the back side (22) and extends a longer distance upwards than a second location (28) on the upper surface (24) that is located closer to the front side (20).

The tread has a primary groove which is provided with a plurality of closing devices including flexible fences. At least one first flexible fence has a thickness t1 and extends from a groove bottom. At least one second flexible fence has a thickness t2 and extends from one groove sidewall toward the other. The second flexible fence forms an angle A1 between an imaginary line connecting a free end of the second flexible fence and a bottom edge of the second flexible fence and an imaginary line extending from the free end of the top edge in a tire radial direction. A width wb1 of the first flexible fence is at most equal to 45% of a width WB of the primary groove, and a width wb2 of the second flexible fence at the bottom edge is at most equal to 40% of the width WB.

A pneumatic tire includes a lateral groove that includes a groove bottom surface extending in a direction crossing a tire circumferential direction, and a protrusion provided on the groove bottom surface and extending in an extension direction of the groove bottom surface. The protrusion includes a main body, and an end portion provided on at least one side in a longitudinal direction of the main body and shaped such that a height of the protrusion from the groove bottom surface decreases from an inside to an outside in the longitudinal direction of the main body. The end portion includes an upper surface that forms a circular arc recessed inward in a tire radial direction in a cross section crossing a width direction of the protrusion.

A pneumatic tire rotatable around a tire rotation axis includes a tread portion provided with a circumferential main groove extending in a tire circumferential direction, and a projecting body provided on a groove bottom of the circumferential main groove and projecting outward from the groove bottom in a tire radial direction. The projecting body includes a first portion connected to the groove bottom and a second portion disposed outward from the first portion in the tire radial direction. In a tire lateral direction, a dimension of the first portion is W1 and a dimension of the second portion is W2, and a condition W1<W2 is satisfied.

A pneumatic tire is disclosed having a tread portion including a tread groove having a groove bottom and groove sidewalls. The tread groove has a groove width defined as a shortest distance between the groove sidewalls. The groove has a groove length extending generally parallel to the groove sidewalls. A sequence of circumferentially spaced stone ejector ribs span between the opposed groove sidewalls.