High speed tyre for heavy duty vehicle.

摘要

A high speed tyre for heavy duty vehicles comprising a radial carcass (7) extending through a tread (5), sidewalls (4) and folded at each edge around a bead core (2) of a bead (3) and a belt layer (10) disposed radially outside said carcass (7) characterised in that in a profile of the outer circumference of the tyre on the tyre section including the tyre axis when the tyre is mounted on its specified rim and inflated to its specified internal pressure, the maximum width and radius ratio (Ro/W) of the radius of curvature (Ro) of the arc which passes through the maximum width point (C) where the tyre width is the maximum (W), the reference point (Q) spaced from the bead bottom line by a distance of 0.2 times the section height (H) of the tyre, and the intermediate height point (M) which is at an intermediate height between the maximum width point (C) and the reference point (Q), to the tyre maximum width (W) is not more than 0.54.