A tire includes tire frame members including bead cores, a bead filler, an inner liner, side-wall rubber and cushion rubber; and an electronic unit provided at an interface of tire frame members, the tire further including: a carcass ply which extends from one bead core to another bead core and includes a rubber-coated reinforcement cord, a belt disposed on the outer side in the tire-radial direction of the carcass ply, in which the cushion rubber is disposed at an end of the carcass ply or at an end of the belt, in which the side-wall rubber is disposed on an outer side in a tire-width direction of the cushion rubber, and in which the electronic unit is disposed between the cushion rubber, and the bead filler or the side-wall rubber.

The invention relates to a heavy-load vehicle comprising at least one axle unit, the or each axle unit having at least one wheel, each wheel having at least one tire, at least one tire being a tubeless radial tire. The tubeless radial tire has an outer diameter of less than 755 millimeters (mm), and is adapted and configured for an internal pressure of at least 10 bar. In some instances, when used as a single tire, the tubeless radial tire has a load-bearing capacity per millimeter section width at a speed of 60 kilometers per hour (km/h) of at least 11 kilograms (kg).

A bead portion of a tire includes: a bead portion including a core; a first filler arranged at the core; a carcass extending around the core and the first filler and radially inward adjacent an axially inner side of the core, the carcass further extending axially outward adjacent the core and radially outward adjacent the core; a second filler extending both axially and radially beyond the first filler, the second filler overlapping the first filler, an outermost end of the second filler being positioned radially outward from the first filler; a first chafer disposed at the second filler; a second chafer extended about the carcass; and a flipper extending radially inward from a position axially adjacent the first filler. The second filler is embedded at a convergence of the first chafer and a sidewall.

An object of the present invention is to provide a heavy duty tire having improved fuel efficiency, wet grip performance, abrasion resistance, chipping resistance, and tear resistance with good balance. The heavy duty comprises a carcass extending from a tread part through a sidewall part to a bead core of a bead part and a belt layer arranged outside in a tire radial direction of the carcass and inside of the tread part, wherein the tread has a cap rubber layer and a base rubber layer, the cap rubber layer comprises a predetermined rubber component and silica and the loss tangent tan δ of the base rubber layer is within a predetermined range.

A pneumatic tire includes a tread portion, a pair of sidewall portions, a pair of bead cores, a carcass layer, a pair of first bead apex rubber components, and a belt layer disposed outward of the carcass layer. In an unloaded condition where the tire is mounted onto a standard rim and inflated with an internal pressure at 50 kPa, the carcass layer has a profile that includes an outer side portion extending from a position (A) where the carcass layer separates from the belt layer to a maximum width position (B) of the carcass layer, and the pair of outer side portion is located outside a virtual arc (C0) having a single radius (R0) of curvature passing through the position (A), the maximum width position (B), and an outermost ends in the tire radial direction of one of the pair of first bead apex rubber components.

A pneumatic tire 1 comprises a carcass 6 comprising a carcass ply (6A) comprising a main body portion (6a) and turned up portions (6b), and bead apex rubbers 8. Each of the bead apex rubbers 8 comprises a first rubber portion 10 and a second rubber portion 11 provided on an outer side in a tire axial direction of the first rubber portion and having smaller rubber hardness than the first rubber portion. A ratio H1/H2 of a height (H1) of an outer end (10e) in a tire radial direction of the first rubber portion 10 from a bead base line (BL) and a height (H2) of an outer end in the tire radial direction of each of the turned up portions (6b) from the bead base line (BL) is in a range of from 1.4 to 1.7.

In a pneumatic tire mountable on a 5°-tapered rim, a bottom of a bead core is inclined from 0°-5° in a direction in which the bottom diverges toward an outer side in a radial direction as the bottom extends from an inner side in the width direction toward an outer side in the width direction. Each bead portion includes a base, a toe, and a heel. The base is inclined from 8°-12° in a direction in which the bead base portion diverges toward the outer side in the radial direction as the base extends from the inner side toward the outer side in the width direction. The heel has a radius of curvature from 25-30 mm. A rim cushion rubber has a modulus at 100% elongation within a range from 5.0-8.0 MPa. The toe has a displacement between before and after mounting on the rim from 9.0-13.5 mm.

A two-wheeled vehicle tire includes a carcass extending between bead cores each disposed in a respective one of bead portions through a tread portion and sidewall portions, the carcass including at least one carcass ply having a ply main portion extending between the bead cores through the tread portion, and a bead apex rubber extending radially outwardly from each bead core. The bead apex rubber includes a first rubber portion arranged adjacent to the ply main portion, and a second rubber portion arranged axially outwardly of the first rubber portion, the first rubber portion has a first end positioning radially outermost thereof, the second rubber portion has a second end positioning radially outermost thereof, and the first end is located radially outwardly of the second end.

A tire includes: a bead core; a bead filler extending to an outer side in the tire-radial direction of the bead core; a carcass ply which is folded back around the bead core; a pad member disposed on an outer side in the tire-width direction of the bead filler; and a first rubber sheet disposed in a state covering a folding end of the carcass ply which is folded back, between the bead filler and the pad member, in which a second rubber sheet covering an electronic component is disposed between the bead filler and the pad member on an outer side in the tire-radial direction of the first rubber sheet.

In a tire 2, chafers 8 each extend from a position axially outward of a corresponding one of beads 10 to a position radially inward of the corresponding one of the beads 10. Sidewalls 6 extend to positions between the beads 10 and the chafers 8, respectively. The chafers 8 extend to positions outward of ends 38 of turned-up portions 44 of a carcass ply 40 in the radial direction. When a side surface 50 represents a portion, of an outer surface of each chafer 8, which contacts with a flange of a rim, an outline of the side surface 50 has an arc C that extends from a heel of the bead 10 portion and projects inward.