Patent ID: 8813801
Filing Date: 2014-08-26
Classification: B60C,Y10S

Abstract:
1. A pneumatic tire comprising: a tire center portion of a tread surface of the tire; a first shoulder portion of the tread surface of the tire disposed on a first side of the tire center portion with respect to a width direction of the tire; and a second shoulder portion of the tread surface of the tire disposed on a second side of the tire center portion with respect to the width direction of the tire, the tire center portion being separated from the first and second shoulder portions by first and second longitudinal grooves formed in the tread surface of the tire, respectively, and extending in a circumferential direction of the tire, the first shoulder portion including a plurality of lateral grooves formed in the tread surface and extending in the width direction of the tire, the lateral grooves being arranged to form a first block row having a plurality of first blocks, each of the first blocks including a plurality of first sipes extending in the width direction of the tire, the first sipes being spaced apart at intervals in the circumferential direction of the tire, the first sipes including a plurality of first open sipes and a plurality of first closed sipes, the first open sipes being alternately arranged with the first closed sipes in the circumferential direction of the tire, the first open and closed sipes having depths with respect to the tread surface, with the depths of the first open sipes in the tread surface being shallower than the depths of the first closed sipes in the tread surface, the depths of the first sipes being in a range from 50% to 90% inclusively of a depth of the first longitudinal groove in the tread surface, and a difference between the depths of the first open sipes and the depths the first closed sipes being within a range from 0.5 mm to 2.0 mm inclusively.