In a pneumatic tire on a rim with 5° taper, a bead core includes a bead core bottom inclined 0° to 5° with respect to a rotation axis in a direction in which the bead core bottom extends outward in a radial direction from an inner side toward an outer side in the lateral direction, a bead portion includes a bead base portion inclined 8° to 12° with respect to the rotation axis in a direction in which the bead base portion extends outward in the radial direction from the inner side toward the outer side in the lateral direction. A bead width BW is a distance between tire inner and outer surfaces on a straight line through a bead core center in the meridian cross-section and parallel to the bead base portion. The bead core has a maximum width CW within a range of (BW×0.54)≤CW≤(BW×0.58).

There is provided an pneumatic tire including a pair of left and right beads each including a bead core and a bead filler, and a carcass ply extending between the pair of beads, wherein the carcass ply is wound up around the bead core from the outside to the inside in the widthwise direction of the tire, and an end portion of the wind-up portion of the carcass ply is provided with notches at a plurality of positions in the circumference direction of the tire.

A pneumatic tire includes: paired bead portions respectively including annular bead cores and bead fillers disposed on an outer side in a tire radial direction of the bead cores; sidewall portions respectively extending outward in the tire radial direction from the bead portions; a tread portion connected to cuter ends in the tire radial direction of the sidewall portions to form a tread; and a carcass layer suspended between the bead portions. The carcass layer has a first ply that continuously extends between the bead portions and that has opposite end portions respectively and a second ply that continuously extends on the outer side in the tire radial direction of the first ply, wherein the first ply has higher tensile strength than that of the second ply, and the end portion is positioned on the outer side in the tire radial direction of the end.

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 includes: paired bead portions respectively including annular bead cores and bead fillers disposed on an outer side in a tire radial direction of the bead cores; sidewall portions respectively extending outward in the tire radial direction from the bead portions; a tread portion connected to outer ends in the tire radial direction of the sidewall portions to form a tread; a carcass layer suspended between the bead portions; and a belt layer provided on an outer side in the tire radial direction of the carcass layer in the tread portion. The carcass layer has a first ply that continuously extends between the bead portions and that has opposite end portions and a second ply that extends from a position in contact with an inner peripheral face of an end portion, wherein the second ply has higher tensile strength than the tensile strength of the first ply.

A pneumatic tire has a rubber hardness higher than a rubber hardness of a rim cushion rubber, and includes a reinforced rubber between a turned back portion of a carcass layer and a sidewall rubber and between the turned back portion and the rim cushion rubber. A height H1 of a bead filler based on a measuring point of a rim diameter has a relationship of 0.10≤H1/SH≤0.23 with respect to a tire cross-sectional height SH. A height H2 of the reinforced rubber based on the measuring point of the rim diameter has a relationship of 0.40≤H2/SH≤0.55 with respect to the tire cross-sectional height SH. A cross-sectional area S2 of the reinforced rubber in a cross-sectional view in a tire meridian direction has a relationship of 1.10≤S2/S1≤2.70 with respect to a cross-sectional area S1 of the bead filler.

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).

Provided is a pneumatic tire having at least one carcass layer as a skeleton extending in toroidal shape over a pair of bead portions, at least one belt layer and a tread disposed on an outer side in the radial direction of a crown portion of the carcass. In a tire section in the widthwise direction in state where the tire is assembled to an application rim, ratio BD/BW of radius difference BD between radius at a center portion and radius at an end portion in the widthwise direction of an innermost layer of the belt layer, to width BW of the innermost layer, ranges from 0.01 to 0.04, and ratio TD/TW of radius difference TD between radius at a center portion and radius at an end portion of the tread in the widthwise direction of a tread ground surface, to tread ground-contact width TW, satisfies BD/BW<TD/TW.

Bicycle tyre (100) which comprises a pair of bead cores (8), a carcass structure (2) turned around the pair of bead cores (8) and a tread band (4) radially outer to the carcass structure (2); at each bead core (8) being provided: an elastomeric material filler (12) which extends in a radial direction for a first length (HI) starting from the bead core (8), a loop (15) interposed between the carcass structure (2) and the elastomeric material filler (12), turned around the bead core (8) so as to define a first flap (15a) axially outer to the elastomeric material filler (12) and a second flap (15b) axially inner to the elastomeric material filler (12), wherein the first flap (15a) extends in a radial direction for a second length (H2) and the second flap (15b) extends in a radial direction for a third length (H3); preferably, the second (H2) and third (H3) lengths are less than or equal to the first length (H1).

A tire for a two-wheeled automotive vehicle includes a carcass that is extended on and between one of beads and the other of the beads along inner sides of a tread and sidewalls. The carcass includes a first ply and a second ply that is layered outward of the first ply. The first ply is turned up around the beads from an inner side toward an outer side in an axial direction. By the turning-up, the first ply includes a main portion and turned-up portions. The second ply is turned back around the beads from the outer side toward the inner side in the axial direction. By the turning-back, the second ply includes a main portion and turned-back portions.