A rubber composition comprises 5 to 150 parts by weight of an inorganic
filler, 0 to 30 parts by weight of a silane coupling agent and 5 to 100
parts by weight of a vegetable oil having an iodine number of at most 130,
based on 100 parts by weight of a diene rubber. A natural rubber is
preferably used as the diene rubber. The rubber composition can reduce
rolling resistance with decreasing the amount of petroleum oils to be
used.
