Patent ID: 6799616
Filing Date: 2004-10-05
Classification: B60C

Abstract:
A pneumatic tire comprising:a tread portion divided into a central region and both side regions, at least one rib-shaped main land part formed in the central region and extending substantially in parallel to an equatorial plane of the tire, a plurality of main slant grooves extending obliquely from the central region toward each tread end of the tread portion with respect to the equatorial plane to form first slant land parts among these main slant grooves, in which each first slant land part has a plane form of approximately a triangle gradually increasing a width of the land part from a side of the equatorial plane toward a side of the tread end, and a first auxiliary land part having such a slope that a height of the land part gradually decreases toward a groove bottom of the main slant groove is arranged between the rib-shaped main land part and the main slant groove, wherein: the slope of the first auxiliary land part joins the groove walls of the main slant groove; and the rib-shaped main land part is integrally united with the first slant land part.