Abstract:
An object of the present invention is to provide a reinforcement member for a tire, which is capable of mitigating stress concentration at respective end portions in the cord extending direction thereof in a satisfactory manner when the reinforcement member is subjected to tensile force. Specifically, the present invention provides a reinforcement member for a tire, constituted of a plurality of cords aligned in parallel to each other and coating rubber provided thereon, characterized in that: each of the cords is constituted of a plurality of filaments; each cord has the cord center portion formed by the intertwined filaments and respective cord end portions positioned at respective sides in the cord extending direction of the cord center portion; and at least one of the cord end portions is constituted of a plurality of the filaments each formed in a wavy or spiral shape and extending separately in an unraveled manner.
Abstract:
A tire (pneumatic tire 1) provided with regularly arranged concave portions (concave portions 80) dented toward a tire inner side direction from a tire surface (tire surface 50) in at least some areas on the tire surface wherein in a direction along with the tire surface, a maximum width L of the concave portion is in a range of 0.1 micrometer or more to less than 50 micrometers, a depth D reaching to a point of the innermost part of the concave portion toward the tire inner side direction from the tire surface is within a range of 0.1 micrometer or more to less than 10 micrometers, in the direction along with the tire surface, an arrangement interval P of the concave portions is within a range more largely than 0.1 micrometer to less than 100 micrometers.