A pneumatic tire is provided that enables communication performance and scratch resistance of a transponder to be improved, A transponder (20) that extends along a tire circumferential direction is embedded between a carcass layer (4) and an innerliner layer, and the transponder (20) is disposed between a position (P1) located on an outer side of and 15 mm away from an upper end (5e) of a bead core (5) in a tire radial direction and a position (P2) located on an inner side of and 5 mm away from an end (7e) of a belt layer (7)in the tire radial direction.

Provided is a pneumatic tire. A band-like sound absorptive member is fixed to the inner surface of a tread portion along the tire circumferential direction. An end portion in the tire width direction of the sound absorptive member is located on the outer side in the tire width direction with respect to a shoulder main groove located on the outermost side in the tire width direction. A width W1 of the sound absorptive member in the tire width direction and a tread development width TDW of the tread portion satisfy a relationship of 0.65≤(W1/TDW)≤0.90. The width W1 of the sound absorptive member and a belt width W2 of a first belt ply having the maximum width of a belt layer satisfy a relationship of 0.70≤(W1/W2)≤0.95.

In this pneumatic tire, a tan δ value T20 of a rubber member, which constitutes at least one of a bead filler, an undertread, a sidewall rubber, and a rim cushion rubber, at 20° C. and a tan δ value T60 of the rubber member at 60° C. satisfy 0.50≤T20/T60≤2.00 and T20≤0.22. Additionally, the tan δ value T20 of the rubber member at 20° C. is in a range T20≤0.15. Additionally, a tan δ value T20_sw of the sidewall rubber at 20° C. and a tan δ value T60_sw of the sidewall rubber at 60° C. satisfy 0.50≤T20_sw/T60_sw≤1.50 and T20_sw≤0.11.

In a pneumatic tire including a bead core, a first bead filler on an outer circumference of the bead core, a carcass turned up from an inner side to an outer side around the bead core and the first bead filler, and a second bead on an outer side of a turned up portion of the carcass, a height of an upper end of the first bead filler is 10%-30% of a cross-sectional height, a turned up end of the carcass is on a radially outer side of a maximum width position, an upper end of the second bead filler is between the upper end and the turned up end, the second bead filler has a shape tapered toward the radially outer side, and thicknesses G1 to G3 of the second bead filler at predetermined positions satisfy 0.5<G2/G1<0.8 and 0.4<G3/G1<0.6.

A pneumatic tire has a bead portion provided with a bead core and a bead apex rubber. The bead apex rubber extends radially outward from the radially outer surface of the bead core, and has a radially outer end not positioned in a first region. The first region is defined between a first radial line and a second radial line. The first radial line extends straight through a radially outer end of a contact area where the bead portion comes into contact with a flange of a wheel rim. The second radial line extends straight through a position spaced 10 mm axially outward from the radially outer end of the contact area.

Provided is a bias tire including: bead cores; a bead filler disposed outward of each of the bead cores in a radial direction; and a carcass layer stretching between the bead cores, wrapping around end portions of the bead cores, the carcass layer having opposite ends turned back to be fixed, wherein in a cross section in a meridian direction, a cord on an innermost side of the carcass layer in a tire lateral direction has a curved shape projecting laterally outward at a height from 0.9 times to 1.6 times a height of a flange of a rim on which the bias tire is assembled, and in the cross section in the meridian direction, a cord on an outermost side of the carcass layer in the lateral direction has a curved shape projecting laterally outward at a height from 1.1 times to 1.6 times the height of the flange.

In a pneumatic tire in which a carcass layer is turned up from a tire inner side to a tire outer side around a bead core of each bead portion, a transponder is embedded between the carcass layer and a rubber layer disposed in a sidewall portion on an outer side of the carcass layer, the transponder extending along a tire circumferential direction in contact with the rubber layer, and the transponder is disposed 10 mm or more away from an end of a turned up portion of the carcass layer in a tire radial direction.

A pneumatic tire includes a pair of bead portions, a pair of bead cores each disposed in a respective one of the pair of bead portions, a carcass extending between the pair of bead cores, the carcass including a carcass ply that includes a main portion extending between the pair of bead cores and a pair of turn-up portions each turned up around a respective one of the pair of bead cores from axially inside to outside of the tire and extending outwardly in a tire radial direction, and a reinforcing rubber layer disposed in each bead portion and being adjacent to an axially outside of the turn-up portion, wherein the reinforcing rubber layer has a laminated body in which a plurality of sheet-shaped rubber members having different radial lengths are laminated in the tire axial direction.

A pneumatic tire includes a transponder extending along a circumferential direction embedded between a position (P1) located on an outer side of and 15 mm away from an upper end of a bead core in a radial direction and a position (P2) located on an inner side of and 5 mm away from an end of a belt layer in the radial direction, and a tire inner surface in which a release agent layer made of a release agent is formed has a surface electric resistivity of 10.sup.9 Ω.Math.cm to 10.sup.15 Ω.Math.cm. The transponder extending along the circumferential direction is embedded between the position (P1) and the position (P2), and the amount of silicon of the release agent at least in the tire inner surface corresponding to an embedment section for the transponder is 10.0 wt % or less or a thickness of the release agent is 100 μm or less.

Provided is a run-flat tire. A first bead filler is disposed on an outer circumferential side of a bead core, a second bead filler is disposed on an outer side in a tire width direction of a turned up portion of the carcass layer along the turned up portion of the carcass layer, and a thickness G on a first reference line of a side reinforcing layer, a thickness G1 on a second reference line of the side reinforcing layer, and a thickness G2 on a third reference line of the side reinforcing layer satisfy the relationships of 0.8×G≤G1≤1.0×G and 0.5×G≤G2≤0.7×G.