Two main groove-rib type tread pattern

Details Two main groove-rib type tread pattern Two main groove-rib type tread pattern

1982-01-22

1983-05-31

Ball, Michael W.

Resilient tires and wheels

Tires, resilient

Anti-skid devices

B60C 1106

Patent

active

043856543

ABSTRACT:
A tread pattern of two main groove-rib type provided with auxiliary grooves having excellent stone-biting resistance and stone-expelling property is disclosed. In the tread pattern, a pair of main grooves are disposed near both side edges of the tread along these edges and one or two pairs of auxiliary grooves are oppositely arranged between the main grooves, wherein the bottom of the auxiliary groove is directed to the center of the tire in such a manner that the center line in radial section of the auxiliary groove is inclined at an angle of 5.degree.-20.degree. with respect to a normal line of the tread drawn from an intersection of the center line and the tread.

REFERENCES:
patent: 3586086 (1971-06-01), Boileau

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