A tire 22 includes a pair of bead portions 66 to be fitted to a rim R. Each bead portion 66 includes a bead 30 having a core 52 and an apex 54. An outer surface 68 of the bead portion 66 includes a seat face 70 and a flange face 72 disposed radially inward and axially outward, respectively, of the bead 30, a heel face 74 disposed between the seat face 70 and the flange face 72, and a plurality of vent lines 78 projecting from the heel face 74 and extending in the circumferential direction. A contour of the heel face 74 is represented by an arc on a cross-section, of the tire 22, taken along a plane including a rotation axis of the tire 22, and a radius Rh of the arc is not less than 8 mm and not greater than 15 mm.

A tire 2 includes a bead portion 2B to be fitted onto a rim R. The bead portion 2B includes a first vent line 50 extending in a circumferential direction, a second vent line 52 located outward of the first vent line 50 and extending in the circumferential direction, a columnar protrusion 54 located outward of the second vent line 52, and a saw cut 56 extending between the first vent line 50 and the columnar protrusion 54 and intersecting the second vent line 52. The first vent line 50, the second vent line 52, the columnar protrusion 54, and the saw cut 56 project from an outer surface of the bead portion 2B. The second vent line 52 is located on the columnar protrusion 54 side with respect to a midpoint LC between the first vent line 50 and the columnar protrusion 54.

A pneumatic tire includes: an air permeation preventive layer disposed in the inner surface of the tire; a belt layer buried in a tread part; and a cord layer formed by arranging a plurality of cords. The cord layer is disposed between the air permeation preventive layer and the belt layer, and extends to a bead part side further from a tire maximum width position. At least a part of the cord layer is located close to the outer surface of the tire, at a position closer to the bead part side than the tire maximum width position, so that the distance between the cords and the outer surface of the tire is not more than 2 mm.

The invention relates to a pneumatic vehicle tire (1) of radial design having a carcass (4) and having components (9, 10) which adjoin the carcass (4), wherein thread-shaped elements (11) are arranged on at least one of the two surfaces of the carcass (4) and preferably serve to discharge occluded air between the carcass (4) and the adjoining components (9, 10) during the construction of the tire. In order to improve the electrical conductivity of the pneumatic vehicle tire (1), at least one thread-shaped element (11) has a coating which is electrically conductive and jointly forms an electrically conductive, thread-shaped element (12) which has an electrical resistance of <1×10.sup.7 Ohm/cm. The invention also relates to a method for manufacturing the electrically conductive coating.

A pneumatic tire has a turned-up carcass ply and a non-turnup carcass ply. The turned-up carcass ply is turned up around bead cores in respective bead portions from the inside to outside of the tire so as to form a pair of turned up portions extending radially outwardly on the axially outsides of the respective bead cores, and a main portion extending between the turned up portions. The non-turnup carcass ply extends between the bead portions and terminates to have edges positioned on the axially outsides of the respective turned up portions. The bead portions are each provided on its outer surface with vent lines protruding therefrom and extending continuously in the tire circumferential direction. The vent lines include a radially outer vent line formed radially outside the edges of the non-turnup carcass ply, and a radially inner vent line formed radially inside the edges of the non-turnup carcass ply.

A tire includes at least one annular structure configured to interface with a wheel. The tire also includes a circumferential tread disposed in a crown region of the tire and an intermediate elastomeric layer having a conductive bleeder cord. The conductive bleeder cord extends from the annular structure to at least a middle third of a tread width and includes a metallic component that conducts electric charge and a textile component that permits gas evacuation.

Provided are a sheet, a method of its preparation, and a tire comprising the sheet, wherein the sheet comprises tire cords, a topping rubber for topping the tire cords, and a conductive fiber located on the surface of the topping rubber. The sheet can provide tires, on which a rubber composition with a low electricity-transmitting property and low rolling resistance is applied, with excellent conductivity.

A multi air chamber tire 1 includes a partition wall 30 configured to define and form a plurality of air chambers 20 disposed adjacent to each other in an inner cavity of a tire, and a ventilation member 10 provided to the partition wall 30, and configured to connect the plurality of air chambers 20 in a state where ventilation is allowed. The ventilation member 10 allows ventilation between the plurality of air chambers 20 when a predetermined condition is satisfied indicating that fluid is being injected into at least one of the plurality of air chambers 20 from outside of the tire, and the ventilation member 10 shuts off the ventilation between the plurality of air chambers 20 when the predetermined condition is not satisfied.

A control valve suitable for use with a tire and pump assembly is described that controls the flow of air from the pump into the tire. The control valve includes an optional bi-directional feature. The pathways alternatively operate to deliver ambient non-pressurized air to the air pumping tube in response to directional tire rotation against a ground surface.

A pneumatic tire includes a surface cord disposed on at least one of an outer surface, which is a surface of a carcass at a tire outer side, and an inner surface, which is a surface of the carcass at a tire inner side. The surface cord has conductivity and is disposed along a tire width direction from at least a region adjoining a bead to a tread. A plurality of the surface cords is disposed with a predetermined interval in a tire circumferential direction.