In a pneumatic tire, a partial tie rubber layer is disposed between a carcass layer and an innerliner layer in a limited manner across an entire region excluding end portions near a pair of bead portions; end surfaces on both sides in a tire lateral direction of the partial tie rubber layer are inclined surfaces that form an acute angle with respect to a surface of the partial tie rubber layer on the carcass layer side; and an inclination angle of the inclined surfaces with respect to the surface of the partial tie rubber layer on the carcass layer side is from 20 to 60.

A pneumatic tire includes one carcass including a folded up portion and a reinforcing layer between the folded up portion and a bead filler. The folded up portion has an end portion in a region inward of a belt layer in a radial direction and inward of the belt layer in a lateral direction. The bead filler has an outer end portion distanced from a bead heel portion from 20% or more to 40% or less of a tire cross-sectional height. The reinforcing layer has an outer end portion outward of the outer end portion of the bead filler in the radial direction and inward in the radial direction with respect to a position of a tire maximum width position in the radial direction. A sidewall portion is formed of a side rubber having tan at 60 C. of from 0.04 or more to 0.10 or less.

When a tire that is mounted on a specified rim, inflated to an internal pressure of 50 kPa, and placed in a no-load state is viewed as a cross-section from the tire meridian direction, a position of 1.30Hf on an outer surface of a sidewall portion, taking a rim flange height (Hf) of the specified rim as a reference, is defined as a point (P), a foot of a normal line (L) drawn from the point (P) to a carcass line of a main body portion (131) of a carcass layer (13) is defined as a point (M), and a point of intersection of the normal line (L) and a carcass line of a folded back portion (132) of the carcass layer (13) is defined as a point (T). At this time, a distance (a) mm from the point (M) to the point (T), a distance (b) mm from the point (T) to the point (P), and a specified load (x) kN have relationships such that a=0.019x+13.3 and b=0.052x+21.6, with a tolerance of not less than 0% and not more than 20%.

A tire (1) includes sidewalls (2), a crown region (3) provided with a tread (4), a reinforcing structure (5) extending between the sidewalls and passing via the crown region, at least a portion of one of the sidewalls and/or of the crown comprising an insert (6) comprising a first elastomer composition serving as a matrix, within which a second elastomer composition derived from recycled tires is distributed substantially uniformly, the modulus of the first composition being at least 10% greater than the modulus of the second composition, and the proportion of second composition being greater than or equal to 40%.

In one aspect of a tire (10) of the present invention, a plurality of carcass plies (50a) include a first carcass ply (51). A first end portion (51a), which is a distal end portion of a portion of the first carcass ply folded around the bead core, is located outside in a tire radial direction from a position (WL) where a dimension in a tire width direction is maximum, and is located at a boundary portion (14) between a tread portion (11) and a sidewall portion (12), and in the portion located outside in the tire radial direction from the position where the dimension in the tire width direction is maximum, a dimension (T5) in a tire thickness direction between the portion of the first carcass ply folded around the bead core and an outer surface (12a) of the tire in the tire width direction is maximum between the first end portion and the outer surface of the tire in the tire width direction.

A pneumatic tire is provided. A tire outer surface contour line from a sidewall portion to a bead portion has a center on a tire axial line passing a tire maximum width position and has a contour arc, which passes the tire maximum width position and is connected to a bead heel portion of the bead portion; and a contour straight line, which has one end connected to the contour arc and the other end connected to the bead heel portion. A connection part of the contour straight line and the bead heel portion is set such that a height H1 in a tire radial direction from a bead toe to the tire maximum width position and a height H5 in the tire radial direction from the bead toe fall with a range of (0.3H1)H5(0.25H1). A connection part of the contour arc and the contour straight line is set such that a height H2 in the tire radial direction from the bead toe falls within a range of (0.9H1)H2(0.75H1).

A radial tire (10) for a heavy vehicle of construction plant type, and more particularly, to the sidewalls thereof (20), aims to reduce the surface cracking of the tire sidewalls and slow down the propagation of cracks in the thickness of the sidewall. The tire (10) comprises two sidewalls (20), each sidewall (20) consisting of a laminate comprising at least first and second sidewall layers (21, 22) that are axially superposed and have a total thickness E, the axially outermost first sidewall layer (21) having a thickness E1 and consisting of a elastomeric compound M1, the axially innermost second sidewall layer (22) having a thickness E2 and consisting of a second elastomeric compound M2. The thickness E1 is at most equal to 0.9 times the total thickness E, the thickness E2 is at least equal to the minimum value between 3 mm and 0.1 times the total thickness E, the first elastomer compound M1 has a number of cycles to failure NR1 at least equal to 150,000 cycles, the second elastomeric compound M2 has a number of cycles to failure NR2 at least equal to 300,000 cycles and the VP1/VP2 ratio of the respective crack propagation rates in the first and second elastomeric compounds (M1, M2) is at least equal to 1.25.

A motorcycle tire includes a tread portion, a pair of sidewall portions, a pair of bead portions, and a carcass extending between the bead portions in a toroidal manner. Each of the sidewall portions is provided with a sidewall rubber. In each of the sidewall portions, a minimum thickness (Ts) is 50% or less of a minimum tire thickness (Ta) from a respective one of tread edges to a tire inner cavity surface. A minimum thickness (Ds) of the sidewall rubber is from 0.3 to 1.9 mm.

In a pneumatic tire, a carcass layer mounted between bead portions includes composite cords made of polyethylene terephthalate fiber yarn having a fineness from 420-1200 dtex and an aromatic polyamide fiber yarn having a fineness from 520-1200 dtex, and a total fineness from 940-2400 dtex, and a twist coefficient from 1600 to 2400, the composite cords having an intermediate elongation from 2.0% to 4.5% with a load of 2.0 cN, having a dimensional stability index from 2.5% to 6.0% which is a sum of a dry heat shrinkage rate at 150 C. and the intermediate elongation with the load of 2.0 cN, and having a ratio of an initial elastic modulus at 100 C. within a load range from 0 N to 44 N with respect to an initial elastic modulus at 25 C. within a load range from 0 N to 44 N, the ratio being from 76% to 94%.

A pneumatic tire includes an annular tread portion extending in a tire circumferential direction, a pair of sidewall portions disposed on both sides of the tread portion, and a pair of bead portions disposed inward of the sidewall portions in a tire radial direction, and the sidewall portions have an average thickness set to range from 1.0 mm to 3.0 mm at a deflection region of each sidewall portion including a tire maximum width position. The bead portions have a bead base width set to range from 115% to 130% of a tread development width of the tread portion.