Pneumatic radial tire

B - Operations – Transporting – 60 – C

Patent

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B60C 11/03 (2006.01) B60C 11/01 (2006.01)

Patent

CA 1284613

ABSTRACT A radial tire having a narrow groove extending in the circumferential direction of the tire and provided in each of both shoulder portions of the surface of a tread, wherein when the depth of said narrow groove as determined in the radial direction of the tire, the distance between the internal edge on said shoulder side of an opening portion of said narrow groove and the outside surface of said shoulder portion as determined parallel to the surface of said tread, and the distance between the internal wall surface on the shoulder side of the bottom of said narrow groove and the outside surface of said shoulder portion as determined parallel to the surface of said tread are expressed by h, d1, and d2, respectively, d1 is less than 15 mm, provided that d1 is smaller than d2, and a shape factor, m, defined by the following equation is 0.8 to 1.2: m = Image

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