Physical properties, friction, and abrasion resistance of foam rubbers suitable for tread compound of snow tires, "Foam Rubber Tire", were investigated. Natural rubber(SMR-CV6O) and synthetic rubber(BR-01, Cis-1,4 polybutadiene) were mixed with a blend ratio of 70:30. Foam rubber vulcanizates having various degrees of foaming were prepared by varying the content of a foaming agent(UNICELL AD#2, azodicarbonamide). Young's modulus and fracture energy of the foam rubbers gradually decreased with increasing the degree of foaming, whereas Tan δ stayed const. Friotional coefficient of the foam rubbers considerably decreased on a smooth glass surface, but increased on a rough surface, as the degree of foaming was increased. A cross-over of the trends on the frictional coefficient occurred at the degree of foaming of 30∼40%. When the test temperature was decreased from 25℃ to 0℃, frictional coefficient decreased on the glass surface, however, slightly increased on the rough surface. Th degree of foaming showing the cross-over, therefore, lowered to 20%. When a magnesia powder was applied to the contact surface, the frictional coefficient generally decreased, and it was found to be higher at the rougher surface, regardless of degree of foaming. the wear loss increased as the degree of foaming was increased. Regular ridge spacings were observed over a relatively low range of degree of foaming. However. somewhat irregular wear pattern and corresponding wear debris were observed above the degree of foaming of 30%.