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 includes: a tread portion including a tread surface; a pair of sidewall portions that extend inward in a tire radial direction from both sides of the tread portion in a tire width direction; and a pair of bead portions each of which includes a bead core that is elongated continuously to an inside of the sidewall portion in the tire radial direction and extends continuously in an annular shape in a tire circumferential direction, and a bead filler disposed adjacent to the bead core and outside the bead core in the tire radial direction. A density of the reinforcing cords changes in a range from 20% inclusive to 60% inclusive of a tire sectional height from a tire inner end in the tire radial direction, and such that an outside of an area, in which the density changes, has a low density of the reinforcing cords.

A tire includes a tread portion, a sidewall portion, and a bead portion. The bead portion includes a bead core that extends continuously in an annular shape in a tire circumferential direction, and a bead filler disposed adjacent to the bead core and outside the bead core in a tire radial direction. Reinforcing cords are provided in the bead portion and the sidewall portion so as to be curved such that inclination angles of the reinforcing cords with respect to the tire circumferential direction gradually increase with nearness to an outside in the tire radial direction.

A pneumatic tire can include a plurality of recesses arranged in a tire circumferential direction. Each recess can include a sidewall surface extending inward in a tire axial direction from an outer surface of a bead portion, and a bottom surface defining a depth of the recess. In a cross-section of the recess including a tire rotation axis, a sidewall surface located on an outer side in a tire radial direction and the bottom surface can be smoothly connected via an arc portion. The arc portion can have a radius of curvature equal to or larger than the depth of the recess.

A tire includes a tread, a pair of sidewalls, a pair of beads, and a carcass. Each bead includes a core and an apex. In the tire in the normal state, a ratio (HA/HS) of a distance HA in a radial direction from a bead base line to an outer end PA of the apex to a tire cross-sectional height HS may not be less than 20% and/or may not be greater than 30%, and an angle of a line segment connecting between the outer end PA of the apex and a center PM of a width, in an axial direction, of a contact surface of the apex at which the apex is in contact with the core, relative to the bead base line, may not be less than 45? and/or may not be greater than 55?.

A pneumatic tire includes a bead portions and a bead core at the bead portions, the tire being mounted to a 15-tapered specified rim. The bead portions include a portion inward in a radial direction of an extension line of an inner circumferential surface of the bead core, the extension line extending in the lateral direction, that is positioned outward in the tire lateral direction of an imaginary line passing through a first intersection point between the extension line and a tire inner surface and extends inward in the tire radial direction from the extension line at an angle perpendicular to the extension line. An angle formed by the imaginary line and a line segment passing through a second intersection point between a bead base and the tire inner surface and the first intersection point between the extension line and the tire inner surface is from 0 to 25.

A pneumatic tire, includes: a lug groove outermost in a lateral direction in a tread portion, the lug groove opening outward in the lateral direction; and a projection portion outward of an opening portion of the lug groove in the lateral direction, the projection portion extending outward in a radial direction past a groove bottom of the lug groove at maximum groove depth and including an end inward of a road contact surface of the tread portion in the radial direction, when the pneumatic tire is inflated to a regular internal pressure and loaded with 70% of a regular load; the projection portion including a body projecting from a tire surface, and an end projection extending from the end of the body with a step portion as an interface, and the end projection having a thinner meridian cross-sectional width than a meridian cross-sectional width of the end of the body.

A bicycle tubeless tire includes a tread and two sidewalls are formed on two sides of the tread. Each sidewall has a lip formed on the distal edge thereof. An installation unit is integrally formed with each lip. Each lip includes an inside, an underside and an outside. The underside and the outside of each lip are engaged with an engaging portion at the inner bottom of the rim when the tire is installed to the rim. The lips do not shift by the engaging portions of the rim. Each of the underside and the outside is a flat side such that the contact area between the lips and the rim is increased to have better air-tight features. The outer face of each lip is a flat face to be installed to the rim without flanges. The deformation of the sidewalls of the tire, and the wind resistance are reduced.

A pneumatic tire 2 has a marking on each sidewall 8 thereof. A large number of dimples 62 are formed in a region between the marking and a rim protector 34. These dimples 62 are arranged along a circumferential direction. These dimples 62 form a row. The row includes: (1) dimples each having a plane shape of a circle; or (2) dimples in each of which a plane shape is substantially a rectangle, and a ratio of a length in the circumferential direction to a width in a radial direction is equal to or greater than 1.0 and equal to or less than 3.0.

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.