Provided is a pneumatic tire including a tread portion having a ground contact surface configured to contact a road surface. The tread portion includes at least one groove that opens to the ground contact surface. The groove includes a projecting region provided with a plurality of fine projections that project from a groove wall surface facing space within the groove so as to be distributed in a point manner. A ratio H/L1 of a projection height H of the fine projection from the groove wall surface and a groove depth L1 of the groove from the ground contact surface is from 0.01 to 0.09. A ratio W/L2 of a width W of the fine projection orthogonal to a projection direction of the fine projection and a groove width L2 of the groove is from 0.002 to 0.02.

A pneumatic tire includes a tread portion having a tread surface for making contacting with a road surface and a groove recessed inward from the tread surface and extending along a circumferential direction, and a plurality of noise reflectors protruding from the groove and disposed spaced apart from each other along the circumferential direction. The groove includes a groove bottom surface spaced apart by a predetermined distance from the tread surface in a radial direction of the pneumatic tire and a plurality of groove side surfaces connected to the groove bottom surface and each including a connection curved surface having a predetermined curvature. Each of the noise reflectors includes a support surface supported by the connection curved surface and the groove bottom surface and a protrusion surface located on a side opposite to the support surface and disposed to be spaced apart from the connection curved surface.

A tire including a tread wear indicator is provided. The tire includes a pair of sidewalls, in which each sidewall extends from a respective bead area to a tread. The tread includes a plurality of main circumferential grooves, in which the main circumferential grooves are disposed in and proximate an axial center area of the tread. At least one shallow groove is formed in the tread, and each shallow groove includes a depth relative to the surface of the tread that is less than a depth of each of the main circumferential grooves. A primary tread wear indicator is disposed in at least one of the main circumferential grooves, and a secondary tread wear indicator is disposed in the shallow groove.

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).

A pneumatic tire includes a block group including shoulder blocks adjacent to each other with a shoulder lug groove therebetween and side blocks adjacent to each other with a side groove positioned on an extension of a shoulder lug groove between the shoulder blocks. Contour lines of side surfaces of the shoulder blocks on the outer side in the tire width direction and contour lines of the top surfaces of the side blocks extend on identical straight lines. Contour lines of the top surfaces of the side blocks, contour lines on a side away from the side groove between the side blocks, and contour lines of the narrow grooves formed on the side blocks each include straight portions extending along the tire radial direction on the side of the shoulder blocks and inclined portions extending in a converging manner toward the side groove between the side blocks.

Tread for heavy-duty vehicle tire, having tread surface in the new state, having a first volume of cavities opening onto the tread surface, a second volume of cavities formed entirely under the tread surface and having at least one channel of height Hc delimited by two main walls spaced apart from one another by a width Lc and connected together by a lower part and by an upper part, this channel intended to form, after partial wear corresponding to a thickness Lu, an additional groove, such that each channel has a plurality of extensions forming cavities extending between this channel and the tread surface over a height He at least equal to 20% and at most equal to 75% of the thickness Lu, each extension opening at least into the upper part of the channel through an opening having a cross-sectional area Sa at least equal to 0.8*(Hc*Lc).

A tread portion has a circumferential groove extending continuously and circumferentially. The circumferential groove has a groove bottom and a pair of groove walls radially extending from the groove bottom to a tread surface. The groove bottom includes groove bottom protruding portions protruding radially outwardly from a groove bottom reference surface parallel to the tread surface at a deepest position of a groove depth of the circumferential groove. Each of the groove bottom protruding portions is formed to be symmetrical about a center line of the circumferential groove in a plan view of the tread portion and has a first groove bottom surface extending radially. The first groove bottom surface includes a first surface portion on one side of the center line and a second surface portion on the other side. An angle between the first surface portion and the second surface portion is from 20° to 170°.

The present application relates to a high grip snow tire, which belongs to a field of snow tire, including a carcass. The carcass is provided with pattern blocks and friction blocks on the circumferential surface thereof, which are positioned on the same side with the equatorial plane of the carcass. The pattern blocks and the friction blocks are successively distributed along the circumference of the carcass, and are in mirror symmetry about the equatorial plane. The friction block includes a plurality of fixing protrusions, which are gradually sharp along the direction away from the carcass. The carcass is provided with a protection groove on the surface thereof, and the fixing protrusions are positioned in the protection groove. The present application has the effect of improving the grip.

A tread for a tire includes: a first tread zone extending circumferentially, continuously, and entirely around the tire, the first tread zone being formed of a first compound; a second tread zone extending circumferentially, continuously, and entirely around the tire, the second tread zone being formed of a second compound different from the first compound; and a boundary groove axially separating the first tread zone from the second tread zone, the first tread zone, the second tread zone, and the boundary groove entirely forming the tread, the boundary groove having an axial centerline disposed an axial distance from an equatorial plane of the tire. The first tread zone has a first circumferential groove and a sidewall portion defining an intermediate circumferential rib of the first tread zone and a shoulder circumferential rib of the first tread zone.

A tread for a tire includes a first circumferential main groove; a second circumferential main groove; a third circumferential main groove; and a fourth circumferential main groove. The fourth circumferential main groove has a stabilizing structure for increasing tread stiffness. The stabilizing structure is axially offset a predetermined amount from a centerline of the fourth circumferential main groove. The fourth circumferential main groove has an angled axially inner sidewall, an angled axially outer sidewall, and a curved base surface. The stabilizing structure extends radially inward from the curved base surface of the fourth circumferential main groove.