Abstract: A pneumatic tire including a tread portion, a pair of sidewall portions, a pair of bead portions, and a carcass extending between the bead portions through the tread portion and sidewall portions, wherein the tread portion is provided radially inside the carcass with a tread tape having a thickness of not more than 2.0 mm and having a tensile elastic modulus larger than any rubber existing between the tread tape and the adjacent carcass cords. A method of manufacturing the pneumatic tire includes vulcanizing a main body of the tire, excepting the tread tape, and attaching the tread tape onto the inside of the vulcanized tire main body.

Abstract: A pneumatic tire comprises a tread portion, a pair of sidewall portions, a pair of bead portions, and a carcass extending between the bead portions through the tread portion and sidewall portions, wherein the tread portion is provided radially inside the carcass with a tread tape having a thickness not more than 2.0 mm and having a tensile elastic modulus larger than any rubber existing between the tread tape and the adjacent carcass cords. A method of manufacturing the pneumatic tire comprises: vulcanizing a main body of the tire excepting the tread tape, and attaching the tread tape onto the inside of the vulcanized tire main body.

Abstract: A noise reducer mounted on the outside of a vehicle wheel utilizing hub bolts is disclosed. The noise reducer comprises a pressure plate and a vibration damper, wherein the pressure plate is provided with mounting holes and mounted on the outside of the wheel, and the vibration damper is disposed in a periphery zone of the pressure plate so that the vibration damper presses a disk portion of the wheel when the pressure plate is mounted.

Abstract: A pneumatic tire with a low aspect ratio of 0.55 to 0.70 comprising a tread provided with four circumferential grooves disposed symmetrically about the tire equator plane to divide the tread into axially spaced five land portions, at least one of the five land portions having a set of lateral grooves crossing the land portion. A sea area ratio Ss/S of a total area Ss of grooves to a total area S of a tread surface is 0.20 to 0.27. A distance La from the tire equator plane to the inner groove edge of the inner circumferential groove among the four circumferential grooves is 0.090 to 0.125 times a tread width TW, and a distance Lb from the tire equator plane to the inner groove edge of the outer circumferential groove among the four circumferential grooves is 2.5 to 3.0 times the distance La.

Abstract: A pneumatic tire having an improved carcass structure capable of increasing the sidewall rigidity, the tire (1) comprising a carcass (8) composed of an inner carcass ply (9) and an outer carcass ply (10), the inner carcass ply having a pair of edges turned up around the bead cores (5) from the axially inside to outside of the tire, each turned up portion thereof extending radially outwardly beyond the maximum tire width point (B), a bead apex (6) disposed between the main portion and the turned up portion, the outer carcass ply having a pair of edges each disposed between the bead apex and each turned up portion of the inner carcass ply, the edges of the outer carcass ply terminated radially outward of the radially inner end of the bead core, each sidewall portion provided with at least one steel cord reinforcing layer (11a, 11b, 11c) made of parallel steel cords.

Abstract: A pneumatic radial tire comprises four main grooves, shoulder lateral grooves (g1L, g1R), middle lateral grooves (g2L, g2R) and central lateral grooves (g3L, g3R); the central lateral grooves (g3L) on one side of the tire equator being circumferentially shifted from the central lateral grooves (g3R) on the other side of the tire equator; the middle lateral grooves (g2L, g2R) shifted from the central lateral grooves (g3L, g3R) towards a circumferential direction (D); the shoulder lateral grooves (g1L, g1R) shifted from the middle lateral grooves (g2L, g2R) towards the circumferential direction (D); the total (WG) of the axial widths (WG1, WG2) of the four main grooves being 0.25 to 0.