| abstract |
An outsole (1) has a body (2), a spike (3), a first projected portion (4), and a second projected portion (5). The spike (3) has a disk-like portion (7) and a pin (8). The disk-like portion (7) and the pin (8) are composed of a rubber-molded material. The rubber-molded material contains 30 wt % or more of polybutadiene or acrylonitrile-butadiene copolymer as a rubber component thereof. The JIS-C hardness of the rubber-molded material is set to the range from 35 to 95 both inclusive. The cutting-time elongation of the rubber-molded material is set to 280% or more. The difference (h1-h2) between a projected height (h1) of the spike (3) and a projected height (h2) of the first projected portion (4) as well as the second projected portion (5) is set to the range from 0 mm to 15 mm both inclusive. |