The present invention provides a studless tire excellent in performance on
ice and snow in which digging friction is improved without losing
adhesion friction. The studless tire has a tread comprising specific
short fiber or plate-like material dispersed in diene rubber so as to be
oriented in the tread thickness direction, wherein when measured at
25.degree. C. the tread has a complex elastic modulus E1 in the tread
thickness direction, and the sheet has a complex elastic modulus E.alpha.
in the extrusion direction and a complex elastic modulus E.beta. in a
90.degree. direction from the extrusion direction, when the rubber
composition is made into 2 mm sheets with a roller and these moduli
fulfill the following equation,
60.ltoreq.(E1-E.beta.)/(E.alpha.-E.beta.).times.100.ltoreq.100 and the
tread has a specific tread rubber hardness. The tire is obtained using a
tread prepared by extruding a rubber composition containing diene rubber
and specific short fiber or plate-type material in a tube shape, thereby
orienting the short fiber in the circumferential direction of the tube
shaped rubber, then cutting the obtained rubber sheet parallel to the
extrusion direction, rotating each piece 90.degree. and laminating.