Pneumatic tire for two-wheeled vehicle

摘要

A center block and a second block that satisfy h1/H=0.05 to 0.4 and w1/W=0.05 to 0.4 are formed on a tread, where H is the block height, h1 is the drop in height of a chamfered part, w1 is the breadth of the chamfered part and W is the length of the block tread in a circumferential direction. When traveling on hard pavement, the chamfered part of the block contacts the hard pavement first and, compared to a case in which an edge that does not have a chamfered part contacts a hard pavement, the ground-contact surface area can be increased and steering stability on hard pavement can be improved. Further, in rough terrain, resistance received from a road surface at the time of ground contact is reduced, travel resistance is suppressed and steering stability is improved.

主权项

1. A pneumatic tire for a two-wheeled vehicle, comprising a plurality of blocks provided on a tread, wherein:
the plurality of blocks includes a chamfered block that has a chamfered part formed at a block tread side edge portion at a leading side and that satisfies h1/H =0.05 to 0.4 and w1/W =0.05 to 0.4 when H is block height, MP1 is an edge of the chamfered part at an inner side in a tire radial direction, MP2 is an edge portion of the chamfered part at the block tread side, h1 is a distance measured along a direction normal to the tread surface from a highest part of the block tread to the tire radial direction inner side edge MP1 of the chamfered part, KP is a trailing edge of the block tread, W is a distance measured along a tire circumferential direction from the tire radial direction inner side edge MP1 to the trailing edge KP, and w1 is the distance measured along the tire circumferential direction from the tire radial direction inner side edge MP1 to the block tread side edge portion MP2, wherein: a tapered surface, which gradually inclines toward the leading side from a base portion of the chamfered block toward a central portion thereof in a height direction, is formed at a block side wall surface at the trailing side of the chamfered block; a reverse taper surface which gradually inclines toward the trailing side of the block tread, is formed at the block tread side of the tapered surface, and the tapered surface and the reversed tapered surface each only include a single tapered surface formed at each block side wall surface in the tire radial direction.