Studless tire having tread including fibers oriented in thickness direction

摘要

There is provided a studless tire that is excellent especially in performance on a snow or ice road. A studless tire, wherein non-metal staple fibers having an average fiber diameter of 1 to 100 mum and an average length of 0.1 to 5 mm are dispersed in a diene rubber in such a way that the non-metal staple fibers are oriented in a thickness direction of a tread, a complex elastic modulus E 1 in the thickness direction of the tread and an elastic module E 2 in a circumferential direction of the tire measured at 25° C. satisfy the equation 1.1<=E 1 /E 2 <=4, and hardness of the tread rubber measured at -10° C. is 45 to 75 degrees.