Pneumatic tire tread with symmetrical grooves having a bent shou

Details Pneumatic tire tread with symmetrical grooves having a bent shou Pneumatic tire tread with symmetrical grooves having a bent shou

1989-03-31

1991-01-22

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

B60C 1103

Patent

active

049863240

ABSTRACT:
A pneumatic tire having a tread pattern formed on a tread surface and comprising a plurality of main grooves extending in the center region of the tread surface towards the circumferential direction of the tire and a plurality of subgrooves extending so as to cross the plurality of main grooves, wherein the percentage groove area of the whole grooves including said main grooves and said subgrooves relative to the area of the whole tread surface is 20 to 30% and the number of pitches at which the circumferential direction of the tire is divided by the plurality of subgrooves is 30 to 45. The pneumatic tire is characterized in that the subgrooves each have a groove portion bent in a wedge form in shoulder regions respectively located outside the outermost main grooves.

REFERENCES:
patent: 4796683 (1989-01-01), Kawabata et al.
patent: 4807679 (1989-02-01), Collette et al.

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