Abstract: A method for manufacturing a pneumatic tire includes: a step of winding carcass plies around a molding drum to mold a carcass, wherein the carcass has a joint portion in which ends of each of the carcass plies in a tire circumferential direction are overlapped with each other, the method further includes a step of pasting a rubber tape that covers at least a part of the joint portion after winding the carcass ply, and the rubber tape has: a central portion pasted to an outside of the joint portion and extending with a constant thickness along the tire circumferential direction; and tapered portions individually extending from both ends of the central portion in the tire circumferential direction along the tire circumferential direction while reducing a thickness of each of the tapered portions, and having tip ends with an angle of 45 degrees or less.

Abstract: A method for manufacturing a pneumatic tire includes: a step of winding carcass plies around a molding drum to mold a carcass, wherein the carcass has a joint portion in which ends of each of the carcass plies in a tire circumferential direction are overlapped with each other, the method further includes a step of pasting a rubber tape that covers at least a part of the joint portion after winding the carcass ply, and the rubber tape has: a central portion pasted to an outside of the joint portion and extending with a constant thickness along the tire circumferential direction; and tapered portions individually extending from both ends of the central portion in the tire circumferential direction along the tire circumferential direction while reducing a thickness of each of the tapered portions, and having tip ends with an angle of 45 degrees or less.

Abstract: A method of manufacturing a pneumatic tire includes preparing a belt forming member formed of belt cords arranged parallel and covered with rubber. In a development state, the belt forming member is formed into a parallelogram, so that in a state wound with the belt cords extending in a direction inclined at a cord angle ?, the belt forming member is formed into a circular cylindrical configuration where a belt-under diameter D is not smaller than 940 mm and not larger than 960 mm and a belt width W is not smaller than 270 mm and not larger than 310 mm, and the cord angle ?, the belt-under diameter D and the belt width W satisfy a relationship of 0.577 ?D?W/tan?<1.07?D. The belt forming member is wound and joined at a joint portion where the inclined sides are brought into contact with each other.

Abstract: An object of the present invention is to provide a pneumatic tire which prevents not only partial wear but also clack generation in land portion of tread surface. In order to achieve the object, the land portion is formed with a first type sipe having a step portion extending in a width direction of the tire on one sipe wall surface and a second type sipe having a step portion extending in the width direction of the tire on a sipe wall surface facing in the opposite direction of the first type sipe as viewed in the circumferential direction of the tire.

Abstract: An object of the present invention is to provide a pneumatic tire which prevents not only partial wear but also clack generation in land portion of tread surface. In order to achieve the object, the land portion is formed with a first type sipe having a step portion extending in a width direction of the tire on one sipe wall surface and a second type sipe having a step portion extending in the width direction of the tire on a sipe wall surface facing in the opposite direction of the first type sipe as viewed in the circumferential direction of the tire.