Abstract: A pneumatic tire includes a plurality of protrusions on a bottom of each of the grooves. The height of the protrusion is variable in a profile of the protrusion in a circumference direction of the pneumatic. The protrusion has at least one peak portion that protrudes away from a center of the pneumatic tire. The pneumatic tire further includes a connection member between the protrusion and an adjacent one of the lands, the connection member having a first end toward the land and a second end toward the peak portion, a height of the first end from the bottom of the groove being larger than that of the second end.

Abstract: To provide a pneumatic tire capable of improving resistance to stone drilling while ensuring snow traction performance, protrusions are arranged at intervals in a groove, each of the protrusions being lower than a height of a block and being separated from the block. The protrusion includes a protrusion main portion having a top portion, and a sloped portion having a slope of which angle with a groove bottom is formed in a range from 3 to 60°. The sloped portion is formed at positions in two directions which are mutually opposite to each other at least along the groove. Consequently, a stone trapped within the groove moves up to the top portion along the slope, and is ejected from the groove. Since the protrusions are arranged separately from the block and are arranged at intervals, the capacity of the groove is ensured. Thus, the resistance to stone drilling can be improved while the snow traction performance is ensured.

Abstract: In a pneumatic tire, a block unit includes a center block and side blocks separated by a communication groove. Aspect ratios of the center block and the side blocks are approximately the same. The center block and the side blocks are arranged such that a longitudinal direction of a rectangle relating to the aspect ratio of the center block and longitudinal directions of rectangles relating to the aspect ratios of the side blocks are approximately orthogonal to each other. Size ratios of a short side of the rectangle relating to the aspect ratio of the center block and the long sides of the rectangles relating to the aspect ratios of the side blocks are in a range equal to or more than 0.90 to equal to or less than 1.10.

Abstract: A tread area is divided into a plurality of lands by a plurality of grooves formed in the tread area. Each of the grooves includes a plurality of protrusions arranged at intervals on a bottom of the groove. The protrusions are lower than the lands from the bottom of the groove, and separated from the lands. Each of the protrusions includes a protrusion main body having a top portion that is a highest portion from the bottom of the groove, and a slope portion having a slop that makes an angle with the bottom of the groove in a range between 3 degrees and 60 degrees. The slope portion is formed in at least one direction along the groove.

Abstract: A pneumatic tire includes a plurality of protrusions on a bottom of each of the grooves. The height of the protrusion is variable in a profile of the protrusion in a circumference direction of the pneumatic. The protrusion has at least one peak portion that protrudes away from a center of the pneumatic tire. The pneumatic tire further includes a connection member between the protrusion and an adjacent one of the lands, the connection member having a first end toward the land and a second end toward the peak portion, a height of the first end from the bottom of the groove being larger than that of the second end.

Abstract: In a pneumatic tire, a block unit includes a center block and side blocks separated by a communication groove. Aspect ratios of the center block and the side blocks are approximately the same. The center block and the side blocks are arranged such that a longitudinal direction of a rectangle relating to the aspect ratio of the center block and longitudinal directions of rectangles relating to the aspect ratios of the side blocks are approximately orthogonal to each other. Size ratios of a short side of the rectangle relating to the aspect ratio of the center block and the long sides of the rectangles relating to the aspect ratios of the side blocks are in a range equal to or more than 0.90 to equal to or less than 1.10.

Abstract: A pneumatic tire, in which a concave portion adjacent to a convex mark is provided on a surface of a sidewall portion, and a ratio of a volume v of the concave portion to a volume V of the convex mark is set as: 0.8V≦v≦1.2V, alternatively, a convex portion adjacent to a concave mark is provided on the surface of the sidewall portion, and a ratio of a volume w of the convex portion to a volume W of the concave mark is set as: 0.8W≦w≦1.2W, thus suppressing a bend of a carcass layer located under a mark spot of the sidewall portion, and making it possible to maintain a carcass line approximately uniformly on a circumference thereof.

Abstract: A pneumatic tire, in which a concave portion adjacent to a convex mark is provided on a surface of a sidewall portion, and a ratio of a volume v of the concave portion to a volume V of the convex mark is set as: 0.8V≦v≦1.2V, alternatively, a convex portion adjacent to a concave mark is provided on the surface of the sidewall portion, and a ratio of a volume w of the convex portion to a volume W of the concave mark is set as: 0.8W≦w≦1.2W, thus suppressing a bend of a carcass layer located under a mark spot of the sidewall portion, and making it possible to maintain a carcass line approximately uniformly on a circumference thereof.