A portable electronic device and method therein for locating tire sensors on a vehicle is provided. The portable electronic device comprises a camera and RFID circuitry. The portable electronic device determines the tire location of each tire on the vehicle using image recognition on image data from the camera. The portable electronic device also detects one or more tire sensors of each tire via the RFID circuitry as the portable electronic device sequentially guides a user of the portable electronic device via a user interface to motion the portable electronic device in proximity of each tire at each determined tire location. Further, the portable electronic device also identifies each of the one or more detected tire sensors on the vehicle.

A heavy-duty tire comprises a tread reinforcing belt comprising first to fourth belt plies each composed of belt cords inclined with respect to the tire equatorial plane. The first radial distance L1 between the belt cords of the third belt ply and the belt cords of the fourth belt ply is not more than the second radial distance L2 between the belt cords of the second belt ply and the belt cords of the third belt ply. The cord count E4 of the fourth belt ply is smaller than the cord count E3 of the third belt ply.

A tire includes a circumferentially continuous decoupling groove that extends radially inward toward the rotational axis of the tire. The decoupling groove is formed by inner and outer walls that are axially spaced apart from each other and joined by a base wall interconnecting inner radial portions thereof. A width between the inner and outer walls of the decoupling groove varies over a radial depth of the decoupling groove. The inner wall extends at an angle of approximately 5° from a radial plane disposed perpendicular to the rotational axis of the tire.

A pneumatic tire for heavy duty having an aspect ratio of 65% or less includes a carcass and a belt layer. A tread portion includes circumferential grooves. The circumferential grooves include a pair of shoulder circumferential grooves and a crown circumferential groove. The crown circumferential groove 11 is a narrow groove and each of the shoulder circumferential grooves is a wide groove. The belt layer includes metal belt cords inclined with respect to a tire circumferential direction. The belt layer has outer ends each positioned outside a respective one of the shoulder circumferential grooves in a tire axial direction. A belt half width is 55% or more and 85% or less of a carcass half width.

A pneumatic tire includes a pair of bead portion, a pair of bead cores, a carcass extending between the pair of bead cores, and a pair of bead apex rubbers. Each bead core includes a core inner surface on an inner side in the tire radial direction of the bead core. In a pre-assemble state, each core inner surface has an angle of 20 degrees plus/minus 2 degrees to the tire axial direction, and is inclined outwardly in the tire radial direction toward an outer side in the tire axial direction. The bead apex rubber includes a first rubber portion arranged so as to cover a circumference of the bead core and having a circular or substantially elliptical outline, and a second rubber portion tapering outwardly in the tire radial direction from the first rubber portion. The first rubber portion is greater in hardness than the second rubber portion.

A tire, the tread of which has an underlayer and a circumferential reinforcement made up of a rubber mixture with a stiffness greater than the stiffness of the rubber mixture and the underlayer, has an outer side and an inner side. The circumferential reinforcement has a reinforcing element of tapered shape positioned in the tread pattern elements disposed axially on the outside with respect to the first or the second circumferential grooves of the tread from the outside to the inside and axially close to the circumferential groove.

Tyre (1) for heavy load vehicle wheels, having a tread band (8) comprising: —a plurality of circumferential grooves (3, 4, 5, 6); —a plurality of transverse grooves (15) extending between two axially consecutive circumferential grooves (3, 4, 5, 6), thus defining a plurality of blocks (21); —each block (21) comprising a radially outer top surface (7) and having a height (M) measured between said top surface and a bottom surface of a respective transverse groove (15); —said transverse grooves (15) comprising a first segment (16) having a width L1 and a second segment (17) having a width L2, where L2<L1; —said first segment (16) being at least partially delimited by walls of two circumferentially consecutive blocks (20, 21); —at least one filling element (18) contained within said first segment (16); —said at least one filling element (18) having a radially outer top surface (19), located radially inwardly relative to said top surface (7) of the block at a radial distance (D) between 5% and 50% of the height (M) of the blocks (21); —the plan surface area (A2) of said top surface (19) of said at least one filling element (18) being greater than 60% of the plan surface area (Ai) of said first segment (16); —said at least one filling element (18) being spaced apart from said walls (27, 28) along at least 70% of its perimeter (P).

A pneumatic tire can suppress uneven wear of the tire and improve the performance on snow. A plurality of inner side circumferential grooves (11a, 11b, 11c) arrayed between a pair of outermost side circumferential grooves (11d, 11d) have a groove width that is smaller than that of the outermost side circumferential grooves (11d) to such a degree allowing land portions on the opposite sides thereof to come into contact with each other upon grounding. A plurality of recessed portions (S) of a shape cut in a radial direction from a tread face are formed along the tire circumferential direction on opposing block wall faces (14Af, 14Bf) of blocks (14A, 14B) on the opposite sides of at least one (11b) of the inner side circumferential grooves.

A heavy truck tire is provided that includes a casing with a central axis, and a rubber tread that has a first layer and a second layer. The first layer is located farther from the central axis in a radial direction than the second layer. The first layer has a lower max tan(δ) than a max tan(δ) of the second layer. The max tan(δ) of the first layer is from 0.06-0.15, and the max tan(δ) of the second layer is from 0.12-0.27. The tire also has a sculptural feature that reduces irregular wear.

Improving the endurance of the beads (1) of a radial tire for a civil-engineering heavy vehicle by proposing a solution which blocks the propagation of the cracks initiated in the coating elastomer of the bead reinforcing layer (5), by inserting a cushion rubber (6) interposed between the coating elastomer of the carcass layer turn-up (312) and the coating elastomer of the bead reinforcing layer (5). The elastic modulus in extension of the cushion rubber (6) measured at 100% deformation must be less than the elastic modulus of the coating compound of the carcass layer. Still according to a disclosed embodiment, the thickness of the cushion rubber (6) is at least equal to the thickness of the bead reinforcing layer (5).