| 摘要 |
<p>A pneumatic tyre comprises a pair of axially spaced bead portions (4) each with a bead core (5), and a carcass (6) comprising a main portion (6A) extending from one of the bead cores (5) to the other. In a state when the tyre is mounted on a standard rim and inflated to standard pressure but loaded with no tyre load, a carcass line inclination angle alpha is set in the range of not more than 20 degrees. The carcass line inclination angle alpha is defined as an angle with respect to the tyre radial direction, of a straight line (X) drawn between a first point (P1) and a second point (P2). The first point (P1) is an intersecting point between an axial line (K2) passing a bead heel point (4A), and a tangent (K1) to a carcass line (L) at a radial height of the radial centre of the bead core (5). The second point (P2) is a point on the carcass line (L) at a radial height of a flange of the standard rim. The carcass line (L) is a thickness centre line of the carcass main portion (6A). <IMAGE></p> |
