An object of the present invention is to provide a pneumatic tire capable of significantly increasing the possibility that the tire can be recycled as a base tire for a retreaded tire without so much sacrificing a product life of the tire prior to retreading. Specifically, the present inventions provides a pneumatic tire 1 having a tread portion 2, plural tread grooves including a first tread groove 5 and a second tread groove 15 formed in the tread portion, and a first bottom-up portion 10 with a top surface 10a as a tread wear indicator, the first bottom-up portion being provided at a groove bottom 5b of the first tread groove 5 such that a distance measured in the tire radial direction from an opening end position 5a of the first tread groove to the top surface 10a is x1, comprising: a second bottom-up portion 20 with a top surface 20a as a retread indicator, the second bottom-up portion being provided at a groove bottom 15b of the second tread groove 15 formed in the central region 3 of the tread portion 2 such that a distance measured in the tire radial direction from an opening end position 15a of the second tread groove to the top surface 20a is x2 shorter than said x1.

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 method of manufacturing a tread band includes providing a mold having one or more protrusions extending outward in a first direction away from a bottom surface of the mold. At least a first one of the protrusions includes a tip feature extending outward in the first direction. Rubber material is introduced into the mold. A first surface of the rubber material opposite the bottom surface covers the tip feature. The rubber material is compressed into the mold. The compressed rubber material covers the tip feature. The mold is released from the rubber material to form a tread band. The tread band has one or more grooves in a second surface opposite the first surface. The one or more grooves correspond to the one or more protrusions in the mold. A first groove corresponding to the first protrusion includes a vent corresponding to the tip feature in the mold.

First direction ridge patterns and second direction ridge patterns are lined-up alternately at a decorative concave portion 18. Plural main ridges 22A through 22D and sub-ridges 26A through 26D, which project-out from a bottom surface 18A, are formed at a first direction ridge pattern 20. The respective ridges are disposed in parallel such that ridge extending directions are a same direction. Light reflection patterns are different at a main ridge region 24, 34 and a sub-ridge region 28, 38.

An off-road tread profile with radially elevated profile elements, which are separated by circumferential channels, and with transversely running channels which open into circumferential channels, wherein the circumferential channels are formed, along their extent over the circumference of the tire, with a varied axial inclination, wherein, in the channel base of a circumferential channel, elevated stone deflectors are formed so as to be free from contact with the channel walls, which stone deflectors are formed from a cylindrical or frustoconical central body with maximum diameter D, the cylinder or cone axis of which is oriented in the radial direction, and from in each case one web-like body situated in front of the body in the extent direction of the circumferential channel and one web-like body situated behind, wherein the two web-like bodies are each formed so as to extend from the shell surface of the central body so as to be oriented parallel to the extent direction of the circumferential channel and point radially away from the central body and with a maximum width b, where (0.5 D)≥b≥1 mm, wherein central bodies are positioned in each case exclusively in circumferential extent regions of opening-in points of at least one transversely running channel into the circumferential channel.

A pneumatic tire with improved heat build-up resistance in a land portion in a tread center region. The pneumatic tire is provided with a tread pattern that includes a plurality of center lug grooves (14) disposed at intervals in a tire circumferential direction that cross a tire equator line; a plurality of shoulder lug grooves (12A, 12B) disposed in intervals between the plurality of center lug grooves in the tire circumferential direction extending outward in the tire width direction, an inner end in the tire width direction being disposed outward of an end of the center lug groove in the tire width direction; a pair of circumferential primary grooves (11A, 11B) extending around an entire circumference of the pneumatic tire in a wave-like shape with the ends of the center lug grooves and the inner ends of the plurality of shoulder lug grooves in the tire width direction alternately connecting to the pair of circumferential primary grooves (11A, 11B); and a circumferential secondary groove (10) disposed on the tire equator line around the entire circumference of the pneumatic tire that intersects the center lug grooves.

A straight line that joins an intersection portion between the center lug groove and the circumferential secondary groove and the end of the center lug groove has an inclination angle with respect to the tire circumferential direction ranging from 55° to 75°.

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 has a lug that forms a contact patch surface, and a recessed region that extends along a prescribed direction and that is recessed relative to the contact patch surface. The recessed region has a first vertical face that that forms a first edge between the first vertical face and the contact patch surface, and a planar base that extends in a width direction of the recessed region which is perpendicular to the prescribed direction. The planar base has at least two planar regions having mutually different heights and arrayed along the prescribed direction. The recessed region further has a second vertical face that connects the two planar regions and that forms a third edge between the second vertical face and a higher one of the planar regions. The third edge is inclined with respect to both a tire width direction and a tire circumferential 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.

Tread having a tread surface intended to come into contact with a road surface and comprising at least one groove of width W and of depth P delimited by two walls facing one another, these walls being joined together by a groove bottom, at least one groove comprising at least one closure device for at least partially closing this groove as it passes through the contact patch, each closure device comprising at least one flexible blade of suitable thickness that allows it to flex under the effect of a circulation of liquid, this at least one flexible blade projecting from the bottom of the groove, each flexible blade being delimited by a contact wall intended to come into contact with the road surface and by end walls each facing a wall delimiting the groove and lateral walls, this tread further comprising at least one passage between the bottom of the groove and each blade of the device, this passage being intended to ensure a minimal flow of water when driving on a water-covered road surface.