Pneumatic vehicle tire

Claim 1

A pneumatic vehicle tire having a radial carcass, a tread strip, and a pull-resistant belt which is disposed between said carcass and said tread strip and comprises a plurality of plies having load-carriers; provided on each side of said tread strip is a respective shoulder-like extension which is formed by a step and does not come into contact with the roadway under normal driving conditions; each step extension has a substantially radially extending surface adjacent to said tread strip, and a base which is substantially parallel to the tread surface of said tread strip and is disposed radially further inwardly than is said tread surface; the edges of said belt extend to within the vicinity of said step extension, and extend laterally beyond said radially extending surfaces thereof by an amount equal to approximately 25-40% of the amount by which the bulged sidewalls of said tire extend beyond said radially extending surfaces at the widest location of said sidewalls; the improvement therewith which comprises: a low-damping rubber layer disposed between at least two of said plies of said belt, said rubber layer having a thickness corresponding at least approximately to the diameter of said load-carriers of said belt plies, though not exceeding a thickness of 5 mm; said rubber layer extends toward both sides of said tire, practically to the planes defined by said radially extending surfaces of said step extension; and a respective strip connected to each edge of said rubber layer, in the region of the two edges of said belt, as an extension of said rubber layer; half the width of a given one of said strips is disposed between the same two aformentioned plies of said belt, and extends to radially inwardly of said base of said step extension; the other half of the width of said given one of said strips extends laterally beyond said base of said step extension; those portions of said strips, which extend laterally beyond said belt, extending radially inwardly and approximately parallel to said radial carcass; said strips having a Shore A hardness of approximately 58 to 80, and said rubber layer having a Shore A hardness of approximately 40 to 50; said strips having a rebound elasticity of 40 to 50%, and said rubber layer having a rebound elasticity of 60 to 70%; said tire having shoulder regions with rubber layers which surround said strips and are significantly softer than the latter, with this difference in Shore A hardness being approximately 5 to 15.