Pneumatic vehicle tire, in particular a commercial vehicle tire, having a tread which has a profile and has at least one circumferential groove (1) which is encircling in the circumferential direction, is embodied to a profile depth (P.sub.T) and in the cross section, starting at the tread external face, is composed of three adjoining groove portions, one outer groove portion (2) that expands in a funnel-shaped manner toward the outside, one 1 mm to 3 mm wide contracted groove portion, and one inner groove portion (4) which lies radially inward, is expanded in relation to the contracted groove portion (3) and has the largest cross-sectional face of all portions, and which is delimited by two cover flanks (4a), lateral groove flanks (4b, 4b) that adjoin said cover flanks (4a), and a groove base (4c). The lateral groove flanks (4b, 4b) in the expanded groove portion (4), while reducing the mutual spacing thereof from the groove base (4c), run at an angle () of 5 to 25 in relation to the radial direction and in the direction of the circumferential extent of said lateral groove flanks (4b, 4b) run in a wave form

A pneumatic tire includes a plurality of main grooves each extending in a tire circumferential direction, and a shoulder rib formed by a shoulder main groove included in the main grooves. The shoulder rib is formed in an outer part of the pneumatic tire in a tire width direction. The shoulder rib includes a closed slit that communicates with the shoulder main groove and ends in the shoulder rib. The shoulder main groove includes a protrusion that extends into the closed slit.

The invention relates to a utility vehicle tire tyre having a tread with at least one circumferential channel (2, 2, 2) with a channel base (5) and channel walls (4, 4). Base elevations are formed on the channel base. A top surface (8, 8, 8) of the base elevations (7, 7, 7) slopes downward uniformly toward the surface edge, wherein the channel walls (4, 4) have, to the side of the base elevations (7, 7, 7), wall sections (4b, 4b) which are convexly curved toward one another.

The present disclosure provides for a molding element for a mold used for manufacturing a tread of a tire having a plurality of contacting element, a plurality of grooves and a connecting member connecting two side faces of adjacent contacting elements, the molding element having a molding surface and a rib for forming the groove between adjacent contacting elements and at least two rib side faces, the rib having a notching portion, a guiding member made of a material different from a material of the molding element being received in the notching portion and has two opposite side faces and a top face configured to form a part of a bottom of the groove, a distal end of the rib projecting member has a chamfered surface facing to an obliquely upward direction for guiding the connecting member toward the guiding slit.

A tire having a circumferential groove having a groove bottom and a pair of groove walls. The groove bottom is provided with groove bottom raised portions protruding radially outwardly from a reference plane 5a. The groove bottom raised portions are a first groove bottom raised portion located on a first side in the width direction of the circumferential groove and a second groove bottom raised portion located on a second side in the width direction. The first and second groove bottom raised portions each has a plurality of repeating units having a first bottom surface extending substantially in the tire radial direction and a second bottom surface inclined with respect to the tire radial direction at a larger angle than the first bottom surface. The inclination direction of the second bottom surfaces of the first groove bottom raised portion is opposite to the inclination direction of the second bottom surfaces of the second groove bottom raised portion.

A tire includes a tread portion being provided with circumferential grooves extending continuously in a zigzag manner. One of the circumferential grooves includes first inclined elements inclined in a first direction with respect to the tire circumferential direction, second inclined elements inclined in a second direction opposite to the first direction with respect to the tire circumferential direction, and intersections where the first inclined elements and second inclined elements intersect. Each of the first inclined elements and the second inclined elements is provided with at least one first protrusion that projects outwardly in a tire radial direction from the groove bottom and connects the pair of groove walls. At least one of the intersections is provided with a second protrusion that projects outwardly in the tire radial direction from the groove bottom and is separated from the pair of groove walls.

A heavy duty tire comprises a tread portion provided with annular land zones divided by circumferentially extending main grooves. At least one of the land zones is provided with first recesses disposed at one edge of the first land zone, second recesses disposed at the other edge of the first land zone, sipes extending from the first recesses to the second recesses, and shallow grooves extending from non-recessed portions of one edge of the first land zone to non-recessed portions of the other edge. The depth of the shallow grooves is less than the depth of the sipes.

Pneumatic vehicle tire having a tread profile with profile bands separated by circumferential channels, each delimited outward by an outer surface and toward the channel by a flank forming a channel wall. In a channel base, first and second rubber blocks are formed. The first blocks are attached in the flank of the first band and the second blocks are attached in the flank of the second band. The first and second blocks are arranged one behind the other in an alternating sequence. Each first block extends in the axial direction as far as a position in the axial extent region of two second blocks and ends with a spacing to the flank of the second band. Each second block extends the axial direction as far as a position in the axial extent region of two first blocks and ends with a spacing to the flank of the first band.

A heavy duty pneumatic tire includes a tread portion provided with a plurality of circumferentially extending main grooves and a plurality of land portions separated by the main grooves. The land portions include a shoulder land portion with a tread edge, a first middle land portion adjacent to the shoulder land portion, and a second middle land portion adjacent to the first middle land portion. The shoulder land portion is formed into a circumferentially continuous rib. The first middle land portion is formed into a row of first middle blocks separated by a plurality of first middle lateral grooves. The second middle land portion is formed into a row of second middle blocks separated by a plurality of second middle lateral grooves. Each first middle block has a circumferential length greater than that of each second middle block.

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.