Abstract: The present invention provides a reinforced lightweight air bladder for a safety tire which can effectively suppress a radial growth under the normal running condition even if it is used for a long tire and, on the other hand, to suppress an occurrence of a crack in a tube under the runflat running condition, thereby exhibiting a superior durability. A hollow toric reinforced air bladder 1 is to be accommodated in a tire 2 to form a safety tire. The reinforced air bladder 1 is filled with the air at an internal pressure determined in relation to a given air pressure of the tire 2 to form a cavity S1 in tire 2. When the internal pressure of the cavity S1 of the tire 2 is dropped due to getting punctured or the like, the reinforced air bladder 2 is radially expanded to take over load support from the tire 2. The reinforced air bladder 1 comprises an air-impermeable tube 6 and a reinforcing hoop layer 7 surrounding entirely an outer circumference of a crown portion of the tube 6.

Abstract: The present invention provides a reinforced lightweight air bladder for a safety tire which can effectively suppress a radial growth under the normal running condition even if it is used for a long tire and, on the other hand, to suppress an occurrence of a crack in a tube under the runflat running condition, thereby exhibiting a superior durability. A hollow toric reinforced air bladder 1 is to be accommodated in a tire 2 to form a safety tire. The reinforced air bladder 1 is filled with the air at an internal pressure determined in relation to a given air pressure of the tire 2 to form a cavity S1 in tire 2. When the internal pressure of the cavity S1 of the tire 2 is dropped due to getting punctured or the like, the reinforced air bladder 2 is radially expanded to take over load support from the tire 2. The reinforced air bladder 1 comprises an air-impermeable tube 6 and a reinforcing hoop layer 7 surrounding entirely an outer circumference of a crown portion of the tube 6.

Abstract: An assembly of a tire and a rim, wherein the internal pressure of the tire acts so as to increase a belt tension at a belt layer (30) since the internal pressure directs to the outer radial direction of the tire at an increased width part (12) and, since the horizontal portions (14a) of drawn parts (14) are prevented from being swelled toward the center of the tire by the flange parts (22) of a rim (20), the drawn parts (14) are swelled toward the center of the tire, whereby, since a reduction in belt tension can be avoided to maintain the roundness of the belt layer (30) and thus a rolling resistance can be lowered.

Abstract: An assembly of a tire and a rim, wherein the internal pressure of the tire acts so as to increase a belt tension at a belt layer (30) since the internal pressure directs to the outer radial direction of the tire at an increased width part (12) and, since the horizontal portions (14a) of drawn parts (14) are prevented from being swelled toward the center of the tire by the flange parts (22) of a rim (20), the drawn parts (14) are swelled toward the center of the tire, whereby, since a reduction in belt tension can be avoided to maintain the roundness of the belt layer (30) and thus a rolling resistance can be lowered.