A pneumatic tyre includes a pair of bead portions having respective bead cores therein, each bead core defining a core innermost end in a tyre radial direction, and an inner liner having an air-impermeable property and extending between the pair of bead portions, wherein in each of the pair of bead portions, the inner liner comprises an innermost end in the tyre radial direction located inwardly of the core innermost ends in the tyre radial direction, and the pair of bead portions has a bead base diameter being less than 99.7% of a rim diameter of a standard wheel rim on which the pneumatic tyre is to be mounted.

A pneumatic tyre includes a pair of bead portions having respective bead cores therein, each bead core defining a core innermost end in a tyre radial direction, and an inner liner having an air-impermeable property and extending between the pair of bead portions, wherein in each of the pair of bead portions, the inner liner comprises an innermost end in the tyre radial direction located inwardly of the core innermost ends in the tyre radial direction, and the pair of bead portions has a bead base diameter being less than 99.7% of a rim diameter of a standard wheel rim on which the pneumatic tyre is to be mounted.

A pneumatic tire is mounted on a 5° rim. A bead core includes a bottom inclined 0°-5° in a direction in which the bottom diverges outward in the radial direction as the bottom extends from an inner side toward an outer side in the width direction. A bead includes a base, a toe, a heel, and a back surface. The heel connects to the back surface by an arc. The base includes a region between a core lower inner end position on an inner circumferential surface of the bead and being identical to a position of a bead core inner end and a core lower outer end position on an inner circumferential surface of the bead and being identical to a position of a bead core outer end in the width direction. The base has a curved line projecting toward the inner side in the radial direction in a cross-section.

A pneumatic tire is mounted on a 5° rim. A bead core includes a bottom inclined 0°-5° in a direction in which the bottom diverges outward in the radial direction as the bottom extends from an inner side toward an outer side in the width direction. A bead includes a base, a toe, a heel, and a back surface. The heel connects to the back surface by an arc. The base includes a region between a core lower inner end position on an inner circumferential surface of the bead and being identical to a position of a bead core inner end and a core lower outer end position on an inner circumferential surface of the bead and being identical to a position of a bead core outer end in the width direction. The base has a curved line projecting toward the inner side in the radial direction in a cross-section.

A tire and rim assembly includes a rim having a pair of flanges, and a pneumatic tire being mounted onto the rim, the pneumatic tire including a pair of bead portions and a rim guard being provided on at least one of the pair of bead portions. In a cross-sectional view of the assembly under a standard state, the rim guard protrudes outwardly in a tire axial direction from a sidewall reference outer surface of the tire so as to cover over one of the pair of flanges. An angle θ of an imaginary rim guard straight line with respect to a tire radial direction is equal to or less than 40 degrees, and a maximum gap (A) in the tire radial direction between the one of the pair of flanges and the rim guard is equal to or less than 2.0 mm.

A tire side portion or a bead portion of a construction vehicle tire, a recessed surface recessed toward the inside of the tire is formed. The recessed surface is formed outside in the tire radial direction from an outside end in the tire radial direction of a rim wheel assembled to the construction vehicle tire, and a groove portion extending in the tire radial direction is formed on the recessed surface. A plurality of groove portions are formed at intervals in the tire circumferential direction.

A motorcycle tire comprises bead portions each having an axially outer surface provided with a profile which comprises a radially inner portion and a radially outer portion. The radially inner portion is located axially outward of a bead core and extending substantially linearly in the tire radial direction. The radially outer portion is smoothly continued from the radially inner portion and extends radially outwardly to a sidewall portion, while inclining toward the axially outside. When an axial width between the bead portions is adjusted to coincide with a rim width between rim flanges, and an axial center of the axial width coincides with an axial center of the rim width, and further the tire rotational axis coincides with the rotational axis of the wheel rim, then at least a part of the radially outer portion of the profile protrudes axially outwardly from a profile of the inner surface of the rim flange.

A motorcycle tire comprises bead portions each having an axially outer surface provided with a profile which comprises a radially inner portion and a radially outer portion. The radially inner portion is located axially outward of a bead core and extending substantially linearly in the tire radial direction. The radially outer portion is smoothly continued from the radially inner portion and extends radially outwardly to a sidewall portion, while inclining toward the axially outside. When an axial width between the bead portions is adjusted to coincide with a rim width between rim flanges, and an axial center of the axial width coincides with an axial center of the rim width, and further the tire rotational axis coincides with the rotational axis of the wheel rim, then at least a part of the radially outer portion of the profile protrudes axially outwardly from a profile of the inner surface of the rim flange.

A rim guard of a tire has a top, an inner surface, and an outer surface. A contour of the inner surface is represented by a circular arc, and the circular arc has a radius of not less than 20 mm and not greater than 30 mm. A contour of the outer surface is represented by a circular arc, and the circular arc has a radius of not less than 100 mm and not greater than 500 mm. In a radial direction, a position of an outer edge of the outer surface coincides with a cross-sectional width specified position, or the outer edge of the outer surface is located outward of the cross-sectional width specified position.

A tire 22 includes a pair of bead portions 66 to be fitted to a rim R. Each bead portion 66 includes a bead 30 having a core 52 and an apex 54. An outer surface 68 of the bead portion 66 includes a seat face 70 and a flange face 72 disposed radially inward and axially outward, respectively, of the bead 30, a heel face 74 disposed between the seat face 70 and the flange face 72, and a plurality of vent lines 78 projecting from the heel face 74 and extending in the circumferential direction. A contour of the heel face 74 is represented by an arc on a cross-section, of the tire 22, taken along a plane including a rotation axis of the tire 22, and a radius Rh of the arc is not less than 8 mm and not greater than 15 mm.