abstract |
(57) [Summary] [Object] An object of the present invention is to provide a tread rubber composition for a studless tire that satisfies both braking performance on ice and abrasion resistance. A tread rubber composition for a studless tire according to the present invention has a weight average molecular weight of 250,000 or more, an oil-extended Mooney of 27 to 43, and a Tg of -70 ° C or less. Part, 40 to 80 parts by weight of carbon black, and at least one kind 3 selected from the group consisting of leathery granular material and vegetable granular material. -30 parts by weight are blended. |