Rubber composition for coating textile cord and tire using the same

A tire having a carcass, wherein said carcass comprises textile cord coated with a rubber composition, said rubber composition for coating a textile cord comprising:

• 25 to 80 parts by mass of silica;
• and 1 to 15 parts by mass of a silane coupling agent on the basis of 100 parts by mass of a diene rubber which contains a natural rubber in amount not less than 85% by mass and an epoxidized natural rubber,
• wherein the nitrogen adsorbing-specific surface area of said silica is 70 to 150 m2/g, wherein carbon black is not contained in said rubber composition for coating a textile cord,
• wherein said silane coupling agent is represented by the following general formula:
• (RO)3—Si—(CH2)x—Sn—(CH2)x—Si—(OR)3
• wherein R is a linear or branched chain alkyl group, the number of carbon atoms of R is an integer of 1 to 8, x is an integer of 1 to 8, n represents the number of sulfur atoms in a polysulfide part, and an average value of n is 2 to 3, and
• wherein the silane coupling agent having two sulfur atoms in the polysulfide part is present in an amount of not less than 60% by mass in the whole silane coupling agent, and
• wherein the textile cord is obtained by twisting a plurality of organic fiber material filaments, wherein the organic fiber material is polyethylene terephthalate.