STUD TIRE

摘要

The present invention provides a studded tire in which the stud pin retention capacity is increased and the performance on snow and ice and the wet performance are enhanced beyond conventional levels. The studded tire of the present invention has stud pins 20 embedded in a road contact surface of a tread portion 1; the rubber composition forming the tread portion 1 containing a diene rubber containing at least one rubber selected from natural rubber, styrene-butadiene rubber, and butadiene rubber, from 5 to 50 parts by weight of carbon black and from 5 to 70 parts by weight of silica per 100 parts by weight of the diene rubber; a glass transition temperature of the diene rubber being not higher than -60°C; a nitrogen adsorption specific surface area of the carbon black being from 50 to 120 m 2 /g; a CTAB specific surface area of the silica being from 80 to 190 m 2 /g; a rubber hardness of the rubber composition being not greater than 60; and a product (SxA) of a stress S (MPa) at the time of 400% elongation and a bottom surface area A (mm 2 ) of a flange portion 23 on a bottom side of the stud pins 20 being not less than 400 and not greater than 850.