Assertion: pneumatic radial tire | /r/HasAspect | a pair of bead portions
Facets:
Source sentences:
text: In accordance with one important aspect of the present invention, there is provided a pneumatic radial tire for heavy duty vehicles having a pair of bead portions each comprising a bead core disposed circumferentially of the tire on a plane which is substantially perpendicular to a rotational axis of the tire, a rubber stiffener disposed radially outwardly of the bead core and shaped in the form of a triangle in cross section, at least one carcass having a fold-back portion folding back at the bead core in a radial direction substantially perpendicular to the rotational axis to cover the bead core and in part the rubber stiffener, and at least first, second and third chafer plies disposed around the carcass to reinforce the bead portions and having embedded therein a plurality of first parallel cords, a plurality of second parallel cords and a plurality of third parallel cords, respectively, two adjacent cords of the first, second and third cords crossing one another, the cords of the first, second and third chafer plies extending with respect to the radial direction at chafer angles of θ 1 , θ 2 and θ 3 , respectively, defined by the following equations,