Pneumatic tire

Details Pneumatic tire Pneumatic tire

1987-12-23

1989-06-13

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Pneumatic tire or inner tube

152209R, B60C 1124

Patent

active

048383309

ABSTRACT:
A pneumatic tire comprising a tread having an outer tread portion arranged at a radially outer side of the tire and composed of one kind of rubber, and an inner tread portion arranged radially inward of an outer surface of a tread wear indicator and composed of several kinds of rubbers, and a pair of sidewalls each arranged between the tread and a bead, the inner tread portion being axially divided into at least three regions and having a central region extending across an equatorial line of the tire and side end regions arranged in opposite sides of the central region, hardnesses of the rubbers of the inner tread portion being gradually increased axially from the central region to the side end region, and hardness of the rubber of an axially outermost side end region being smaller than that of the rubber of the outer tread portion.

REFERENCES:
patent: 3814160 (1974-06-01), Creasey
patent: 3916968 (1975-11-01), Masson
patent: 4349061 (1982-09-01), Hirakawa et al.
patent: 4739811 (1988-04-01), Rampl

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