RUBBER COMPOSITION FOR TIRE

PROBLEM TO BE SOLVED: To obtain a rubber composition having excellent wet grip properties, abrasion resistance and processability. SOLUTION: This rubber composition for tire comprises (i) 100 parts of a rubber component composed of 15-70 parts of a copolymer which is a copolymer of a conjugated diene and an aromatic vinyl compound, has 10-60% styrene content and 30-70% vinyl bond amount of butadiene part and exhibits a weight- average molecular weight distribution of two-peak type and 10-70 parts of a conjugated diene-based rubber, (ii) 40-120 parts of a filler component composed of 10-110 parts of silica having 100-200 m2/g N2 SA and 100-110 parts of carbon black having 50-200 m2/g N2 SA, (iii) 2-15% based on silica weight of a silane coupling agent of an alkoxysilane compound containing a sulfur bond, (iv) 2-15% based on silica weight of a polysiloxane compound having a specific repeating unit and 200-100,000 number-average molecular weight and (v) 0.5-5 pts.wt. of a tetrabenzylthiuram disulfide vulcanization accelerator.