A pneumatic tire having a tread, a sidewall, a bead portion having a bead core, a bead reinforcing layer reinforcing the bead portion, and a carcass ply moored on a bead core of the bead portion, wherein the bead reinforcing layer and adjacent members adjacent to the bead reinforcing layer are each composed of a rubber composition containing an amine type antioxidant, 0.3 to 8 parts by mass of the amine type antioxidant is contained in the bead reinforcing layer based on 100 parts by mass of the rubber component, and the adjacent member adjacent to the bead reinforcing layer and the bead reinforcing layer satisfy the following formula:
2≤B/A≤8
A: Content (wt %) of amine type antioxidant in bead reinforcing layer.
B: Content (wt %) of amine type antioxidant in the adjacent member.

A tire comprises a carcass ply extending between bead portions through a tread portion and sidewall portions, and turned up around a bead core in each of the bead portions from the inside to the outside in the tire axial direction so as to form a pair of turnup portions and a main portion therebetween. Each of the bead portions is provided with: a rubber bead apex disposed between the turnup portion and the main portion, and extending radially outwardly from the bead core in a tapered manner; a bead reinforcing rubber layer disposed axially outside the main portion; and an insulation rubber layer disposed between the main portion and the bead reinforcing rubber layer and having a hardness smaller than a hardness of the bead reinforcing rubber layer.

A pneumatic tire comprises a carcass ply extending between bead portions through a tread portion and sidewall portions, and turned up around a bead core from the inside to the outside of the tire in each of the bead portions, so as to form a pair of turnup portions and a main portion therebetween. In each the bead portion, a first apex rubber and a second apex rubber are disposed. The first apex rubber is disposed between the turnup portion and the main portion. The second apex rubber is disposed axially outside the turnup portion. A complex elastic modulus b of the second apex rubber is larger than that of the first apex rubber. The cross-sectional width Wt in mm of the tire and the outer diameter Dt in mm of the tire satisfy the following conditions Dt=<59.078×Wt.sup.0.498 and Dt>=59.078×Wt.sup.0.460.

A pneumatic tire 1 has a carcass 6 extending between a first bead portion 4A and a second bead portion 4B through a tread portion 2 and a pair of sidewall portions 3. The carcass 6 is composed of at least two carcass plies 7 including a first carcass ply 7A and a second carcass ply 7B which have the same ply length. Each of the first carcass ply 7A and the second carcass ply 7B is arranged asymmetrically with respect to the tire equator C.

A motorcycle tire set includes a front-wheel tire and a rear-wheel tire. Each of the front and rear-wheel tires includes a carcass, a band layer arranged radially outwardly of the carcass in the tread portion, and a tread rubber arranged radially outwardly of the band layer. The carcass includes a carcass ply including carcass cords. The band layer includes a jointless band ply in which a band cord is circumferentially wound spirally at an angle equal to or less than 5 degrees. The tread rubber includes a crown rubber portion. An angle θ1 of the carcass cords of the front-wheel tire is 65 degrees or more with respect to the tire circumferential direction. A rubber hardness of the crown rubber portion of the rear-wheel tire is greater than a rubber hardness of the crown rubber portion of the front-wheel tire.

A pneumatic tire includes a tread portion, sidewall portions, a pair of bead portions embedded with bead cores, and a carcass. The carcass includes a turned up ply including a main body portion extending between the bead cores, and a pair of turned up portions turned up around the bead cores from axially inside to outside. Each bead portion is provided with an inner apex rubber extending radially outward from the bead core between the main body portion and the turned up portion and an outer apex rubber arranged axially outside the turned up portion. The inner apex rubber has a radial height of from 18 to 30 mm. A buttress thickness D, a maximum width thickness E, and a bead thickness F satisfy Expressions (1) to (4):

E≥4.5 mm  (1)

F≥9.0 mm  (2)

E/D=0.6 to 0.9  (3)

F/E=1.7 to 2.2  (4).

A tire with a radial carcass reinforcement, made up of at least one layer of metal reinforcing elements inserted between two skim layers of elastomer compound containing a reinforcing filler made up of at least carbon black. The tensile elastic modulus at 10% elongation of at least the skim layer closest to the internal cavity of at least the carcass reinforcement layer closest to the internal cavity is less than 8.5 MPa and at least the said skim layer closest to the internal cavity of at least the carcass reinforcement layer closest to the internal cavity has a macrodispersion value Z greater than 85.

A tire for a civil engineering vehicle the endurance of which has been improved by the addition of an anti-creep layer (30) with a thickness E2 interposed between the airtight inner layer (20), with a thickness E1, and the reinforcer coating layer (46) of the carcass reinforcement (40), with a thickness E3. The thicknesses E1, E2 and E3, being measured in millimetres in a shoulder region forming the transition between the crown and each sidewall of the tire, satisfy the following equations: 2≤E1≤4; 6≤E2+E3 and E1/E2≥0.6. In addition, the viscoelastic loss P60 of the elastomeric mixture M2 of the anti-creep layer (30) is at most equal to 20%.

The present invention is directed to an article of manufacture, in one case a pneumatic tire. having at least one cord-reinforced rubber component comprising (A) a reinforcing cord; and (B) a rubber composition contacting the cord, the rubber composition comprising (1) from 70 to 100 phr of at least one polyisoprene rubber selected from the group consisting of natural rubber or synthetic polyisoprene; (2) from 0 to 30 phr of at least one additional rubber selected from the group consisting of polybutadiene and styrene-butadiene rubber; (3) from 20 to 80 phr of carbon black; (4) from 2 to 10 phr of silica; (5) from 0 to 1 phr of a cobalt salt; and (6) from 0.5 to 5 phr of N, N′-m-phenylene bismaleimide; wherein the rubber composition excludes resins and silane coupling agents.

A tire for a civil engineering vehicle the endurance of which has been improved by the addition of an anti-creep layer (30) with a thickness E2 interposed between the airtight inner layer (20), with a thickness E1, and the reinforcer coating layer (46) of the carcass reinforcement (40), with a thickness E3. The thicknesses E1, E2 and E3, being measured in millimetres in a shoulder region forming the transition between the crown and each sidewall of the tire, satisfy the following equations: 2≤E1≤4; 6≤E2+E3 and E1/E2≥0.6. In addition, the viscoelastic loss P60 of the elastomeric mixture M2 of the anti-creep layer (30) is at most equal to 20%.