A pneumatic tire has a rubber hardness higher than a rubber hardness of a rim cushion rubber, and includes a reinforced rubber between a turned back portion of a carcass layer and a sidewall rubber and between the turned back portion and the rim cushion rubber. A height H1 of a bead filler based on a measuring point of a rim diameter has a relationship of 0.10≤H1/SH≤0.23 with respect to a tire cross-sectional height SH. A height H2 of the reinforced rubber based on the measuring point of the rim diameter has a relationship of 0.40≤H2/SH≤0.55 with respect to the tire cross-sectional height SH. A cross-sectional area S2 of the reinforced rubber in a cross-sectional view in a tire meridian direction has a relationship of 1.10≤S2/S1≤2.70 with respect to a cross-sectional area S1 of the bead filler.

Provided is a pneumatic tire that has excellent durability and achieves both high load capacity and space-saving properties. This disclosure provides a pneumatic tire to be mounted on a vehicle, which includes a tread in contact with a road surface and a belt layer provided inside the tread in the tire radial direction, where the pneumatic tire has an outer diameter of 350 mm or more and 600 mm or less, and when the rim width of a rim wheel assembled to the pneumatic tire is defined as RW, and the tire cross-sectional width of the pneumatic tire is defined as SW, they satisfy the relationship of

0.78≤RW/SW≤0.88, and the pneumatic tire uses a rubber composition containing a rubber component containing 50% by mass or more of natural rubber and/or synthetic isoprene rubber, and syndiotactic 1,2-polybutadiene.

Provided is a pneumatic tire that has excellent durability and achieves both high load capacity and space-saving properties. This disclosure provides a pneumatic tire to be mounted on a vehicle, which includes a tread in contact with a road surface and a belt layer provided inside the tread in the tire radial direction, where the pneumatic tire has an outer diameter of 350 mm or more and 600 mm or less, and when the rim width of a rim wheel assembled to the pneumatic tire is defined as RW, and the tire cross-sectional width of the pneumatic tire is defined as SW, they satisfy the relationship of

0.78≤RW/SW≤0.88, and the pneumatic tire uses a rubber composition containing a rubber component containing 50% by mass or more of natural rubber and/or synthetic isoprene rubber, and syndiotactic 1,2-polybutadiene.

A motorcycle tire pair includes a front tire 2 and a rear tire 42. A center arc index Ac, a middle arc index Am, and a shoulder arc index As are obtained on the basis of a contour line TLf of a tread surface 16 of the front tire 2 and a contour line TLr of a tread surface 56 of the rear tire 42. In the tire pair, the middle arc index Am is larger than the center arc index Ac, and the shoulder arc index As is larger than the middle arc index Am.

A motorcycle tire pair includes a front tire 2 and a rear tire 42. A center arc index Ac, a middle arc index Am, and a shoulder arc index As are obtained on the basis of a contour line TLf of a tread surface 16 of the front tire 2 and a contour line TLr of a tread surface 56 of the rear tire 42. In the tire pair, the middle arc index Am is larger than the center arc index Ac, and the shoulder arc index As is larger than the middle arc index Am.

A pneumatic tire comprises a carcass layer, a belt layer disposed on an outer side of the carcass layer in a tire radial direction, and a tread rubber disposed on the outer side of the belt layer in the tire radial direction. The belt layer formed by laminating an angle belt having a belt angle ≥45° and ≤70° in absolute values, a pair of cross belts, having belt angles of ≥10° and ≤45° in absolute values and having belt angles of mutually opposite signs, and a circumferential reinforcing layer having a belt angle within a range of ±5° with respect to a tire circumferential direction. A tread width TW and a cross-sectional width Wca of the carcass layer have a relationship such that 0.82≤TW/Wca≤0.92. A width Ws of the circumferential reinforcing layer and a cross-sectional width Wca of the carcass layer such that 0.60≤Ws/Wca≤0.70.

A pneumatic tire comprises a carcass layer, a belt layer disposed on an outer side of the carcass layer in a tire radial direction, and a tread rubber disposed on the outer side of the belt layer in the tire radial direction. The belt layer formed by laminating an angle belt having a belt angle ≥45° and ≤70° in absolute values, a pair of cross belts, having belt angles of ≥10° and ≤45° in absolute values and having belt angles of mutually opposite signs, and a circumferential reinforcing layer having a belt angle within a range of ±5° with respect to a tire circumferential direction. A tread width TW and a cross-sectional width Wca of the carcass layer have a relationship such that 0.82≤TW/Wca≤0.92. A width Ws of the circumferential reinforcing layer and a cross-sectional width Wca of the carcass layer such that 0.60≤Ws/Wca≤0.70.

Big wheel cars that have wheels with diameters of 24″, 26″, and 28″ have tires that are currently made specifically for various weather conditions which require the tires to have tread on the face of the tire, but nothing regarding high performance or racing applications. This invention will give the car more traction and safer stopping/steering performances during high performance applications that include DOT approved tires for public highways, and non-DOT approved tires for racing applications on raceways.

Big wheel cars that have wheels with diameters of 24″, 26″, and 28″ have tires that are currently made specifically for various weather conditions which require the tires to have tread on the face of the tire, but nothing regarding high performance or racing applications. This invention will give the car more traction and safer stopping/steering performances during high performance applications that include DOT approved tires for public highways, and non-DOT approved tires for racing applications on raceways.

A contour CL of a carcass 12 includes a curved portion 44 and an inversely curved portion 46. A boundary between the curved portion 44 and the inversely curved portion 46 is an inflection point PV. A part or an entirety of the curved portion 44 is represented by a first arc. A part or an entirety of the inversely curved portion 46 is represented by a second arc. The first arc and the second arc are tangent to each other at the inflection point PV. A ratio (X/W) of a distance X in an axial direction to a distance W in the axial direction is not less than 70% and not greater than 85%. A ratio (Y/H) of a distance Y in a radial direction to a distance H in the radial direction is not less than 15% and not greater than 22%.