Pneumatic tires having reduced negative ratio variation

Details Pneumatic tires having reduced negative ratio variation Pneumatic tires having reduced negative ratio variation

1988-12-15

1991-01-08

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

152209R, B60C 1111

Patent

active

049827758

ABSTRACT:
In a pneumatic tire, when a distance between centers in circumferential direction of adjoining grooves at the center of the tread is a pitch and divided into four equal zones, a ratio of maximum negative ratio to minimum negative ratio among negative ratios of these four divided zones in one pitch is not more than 1.22. Thus, the traction performances and ride comfortability are considerably improved.

REFERENCES:
patent: 4289183 (1981-09-01), Abe et al.
patent: 4480672 (1984-11-01), Marshall et al.

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