Patent ID: 7470742

Claim:
A rubber composition for covering a carcass cord comprising: a diene rubber, 25 to 80 parts by mass of silica based on 100 parts by mass of the diene rubber, 1 to 15 parts by mass of a silane coupling agent based on 100 parts by mass of the diene rubber, and 3 to 30 parts by mass of an organic vulcanizing agent represented by the formula (1) based on 100 parts by mass of the diene rubber: —(R—S x ) n — wherein R is —(CH 2 —CH 2 —O) m —CH 2 —CH 2 —; x is an integer of 2 to 6; n is an integer of 10 to 400; and m is an integer of 2 to 5, wherein said diene rubber comprises 85 to 100% by mass of a natural rubber.