Resilient tires and wheels – Tires – resilient – Anti-skid devices
Patent
1984-03-16
1987-01-13
Ball, Michael
Resilient tires and wheels
Tires, resilient
Anti-skid devices
B60C 1104
Patent
active
046356940
ABSTRACT:
A pneumatic radial tire for heavy load is provided in which a tread design formed on the tread portion is divided into a tread part Ab with larger ground contact area ratio and a tread part Aa with smaller ground contact area ratio with the tread equator plane as a boundary, the ratio Sa/Sb of a ground contact area ratio Sa of the tread part Aa to a ground contact area ratio Sb of the tread part Ab is set in a range of 0.71 through 0.89, and the tread part Aa with smaller ground contact area ratio is located on the inner side of a vehicle when the tire is mounted thereon. Whereby, abnormal wears, such as one-sided wear or shoulder wear, occurred in the tread portion of the tire mounted to, particularly, a steering wheel can be alleviated so as to improve wear resistance of the tread portion and hence to prolong the service life of the tire remarkably.
REFERENCES:
patent: 3162229 (1964-12-01), Ellenrieder et al.
patent: 3217776 (1965-11-01), Ellenrieder et al.
patent: 3286756 (1966-11-01), Ellenrieder et al.
Ball Michael
The Yokohama Rubber Co. Ltd.
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