RUBBER COMPOSITION FOR TIRES AND TIRE

The present disclosure aims to provide a tire rubber composition and a tire which have good wet grip performance and an excellent ability to reduce deterioration of wet grip performance and abrasion resistance over time. The present disclosure relates to a tire rubber composition which contains one or more rubber components having a combined content of styrene-butadiene rubber and polybutadiene of 90% by mass or more, one or more fillers, and one or more vulcanizing agents, the rubber composition as a whole having a vinyl content of 20 mol% or higher and a trans content of 50 mol% or higher, each based on 100 mol% of the combined amount of the butadiene-based structural units in the butadiene portion of the styrene-butadiene rubber and the polybutadiene.