Pneumatic tire

A pneumatic tire comprising a belt layer having a pair of cross belts and a circumferential reinforcing layer disposed between the cross belts or disposed inward in a tire radial direction of the cross belts;

• wherein,
• the circumferential reinforcing layer has a multiple winding structure composed of a plurality of wires that are wound spirally around side-by-side to each other at a slant within a range of ±5 deg with respect to a tire circumferential direction, each of the plurality of wires of the multiple winding structure continuously extending over an entire width of the circumferential reinforcing layer respectively;
• an offset angle β1 in the tire circumferential direction of end portions of the plurality of wires at a first edge and an offset angle β2 in the tire circumferential direction of end portions of the plurality of wires at a second edge of the circumferential reinforcing layer are within a range of 5 deg≦β1≦180 deg and 5 deg≦β2≦180 deg;
• a crossing angle α in the tire circumferential direction of an end portion of the wire at the first edge and an end portion of the wire at the second edge of the circumferential reinforcing layer is within a range of 5 deg≦α≦355 deg;
• the circumferential reinforcing layer is disposed inward in the tire width direction of the left and right edges of a narrower cross belt of the pair of cross belts, and a width W of the narrower cross belt and a distance S from an edge of the circumferential reinforcing layer to an edge of the narrower cross belt are in ranges such that 0.03≦S/W;
• and
• the circumferential reinforcing layer continuously extending from a first side of a tire equatorial plane to a second side of the tire equatorial plane in the tire width direction.

A pneumatic tire comprising a belt layer having a pair of cross belts and a circumferential reinforcing layer disposed between the cross belts or inward in a tire radial direction of the cross belts;

• wherein,
• the circumferential reinforcing layer has a divided structure in which the circumferential reinforcing layer is divided into a plurality of portions in a tire width direction, and each of divided portions of the circumferential reinforcing layer has a single winding structure configured by one wire that is wound spirally at a slant within a range of ±5 deg with respect to a tire circumferential direction;
• a crossing angle α in the tire circumferential direction of an end portion of the wire at a first edge and an end portion of the wire at a second edge of the circumferential reinforcing layer is within a range of 5 deg≦α≦355 deg;
• a difference between a maximum value and a minimum value of the apparent number of wire cords when viewed as a cross-section from a direction perpendicular to the tire circumferential direction is equal to or less than one cord in any 30 deg zone around a tire rotational axis;
• and
• the circumferential reinforcing layer is disposed inward in the tire width direction of the left and right edges of a narrower cross belt of the pair of cross belts, and a width W of the narrower cross belt and a distance S from an edge of the circumferential reinforcing layer to an edge of the narrower cross belt are in ranges such that 0.03≦S/W.

A pneumatic tire comprising a belt layer having a pair of cross belts and a circumferential reinforcing layer disposed between the cross belts or disposed inward in the tire radial direction of the cross belts;

• wherein,
• the circumferential reinforcing layer has a divided structure in which the circumferential reinforcing layer is divided into a plurality of portions in a tire width direction, and each of divided portions of the circumferential reinforcing layer has a multiple winding structure configured by a plurality of wires that are wound spirally around side-by-side to each other at a slant within a range of ±5 deg with respect to a tire circumferential direction;
• at least one of an offset angle β1 in the tire circumferential direction of end portions of the plurality of wires at a first edge and an offset angle β2 in the tire circumferential direction of end portions of the plurality of wires at a second edge of the circumferential reinforcing layer is within a range of no less than 0 deg and less than 5 deg;
• a crossing angle α in the tire circumferential direction of an end portion of the wire at the first edge and an end portion of the wire at the second edge of the circumferential reinforcing layer is within a range of 10 deg≦α≦350 deg;
• a difference between a maximum value and a minimum value of the apparent number of wire cords when viewed as a cross-section from a direction perpendicular to the tire circumferential direction is equal to or less than the number of wire cords that configure one of the divided portions in any 30 deg zone around a tire rotational axis;
• and
• the circumferential reinforcing layer is disposed inward in the tire width direction of the left and right edges of a narrower cross belt of the pair of cross belts, and a width W of the narrower cross belt and a distance S from an edge of the circumferential reinforcing layer to an edge of the narrower cross belt are in ranges such that 0.03≦S/W.

A pneumatic tire comprising a belt layer having a pair of cross belts and a circumferential reinforcing layer disposed between the cross belts or disposed inward in the tire radial direction of the cross belts;

• wherein,
• the circumferential reinforcing layer has a divided structure in which the circumferential reinforcing layer is divided into a plurality of portions in the tire width direction, and each of divided portions of the circumferential reinforcing layer has a multiple winding structure configured by a plurality of wires that are wound spirally around side-by-side to each other at a slant within a range of ±5 deg with respect to a tire circumferential direction;
• an offset angle β1 in the tire circumferential direction of end portions of the plurality of wires at a first edge and an offset angle β2 in the tire circumferential direction of end portions of the plurality of wires at a second edge of the circumferential reinforcing layer are within a range of 5 deg≦β1≦180 deg and 5 deg≦β2≦180 deg;
• a crossing angle α in the tire circumferential direction of an end portion of the wire at the first edge and an end portion of the wire at the second edge of the circumferential reinforcing layer is within a range of 5 deg≦α≦355 deg;
• a difference between a maximum value and a minimum value of the apparent number of wire cords when viewed as a cross-section from a direction perpendicular to the tire circumferential direction is equal to or less than the number of wire cords that configure one of the divided portions in any 30 deg zone around the tire rotational axis;
• and
• the circumferential reinforcing layer is disposed inward in the tire width direction of the left and right edges of a narrower cross belt of the pair of cross belts, and a width W of the narrower cross belt and a distance S from an edge of the circumferential reinforcing layer to an edge of the narrower cross belt are in ranges such that 0.03≦S/W.

A pneumatic tire comprising a belt layer having a pair of cross belts and a circumferential reinforcing layer disposed between the cross belts or disposed inward in a tire radial direction of the cross belts;

• wherein,
• the circumferential reinforcing layer has a single winding structure configured by a plurality of wires that are wound spirally around side-by-side to each other at a slant within a range of ±5 deg with respect to a tire circumferential direction;
• at least one of an offset angle β1 in the tire circumferential direction of end portions of the plurality of wires at a first edge and an offset angle β2 in the tire circumferential direction of end portions of the plurality of wires at a second edge of the circumferential reinforcing layer is within a range of no less than 0 deg and less than 5 deg;
• a crossing angle α in the tire circumferential direction of an end portion of the wire at the first edge and an end portion of the at the second edge of the circumferential reinforcing layer is within a range of 10 deg≦α≦350 deg;
• the circumferential reinforcing layer is disposed inward in the tire width direction of the left and right edges of a narrower cross belt of the pair of cross belts, and a width W of the narrower cross belt and a distance S from an edge of the circumferential reinforcing layer to an edge of the narrower cross belt are in ranges such that 0.03≦S/W;
• and
• the offset angle β1 is within a range of 0 deg<β1<5 deg and the offset angle β2 is within a range of 0 deg<β2<5 deg.