In order to solve the various conventional problems described above, the present invention provides a tire which is excellent in a braking property and a drivability (WET performance) on a wet road surface and which sufficiently displays an edge effect or a spike effect and is excellent in an on-ice performance (surface braking and driving performance). Further, the present invention provides a tire which enhances a workability in a plant and in which micro drain ditches exhibiting a water film-removing performance are surely formed. A foamed rubber layer provided on a surface of the tire substantially brought into contact with a road surface contains at least one inorganic compound powder having a particle diameter of 10 .mu.m or less in a range of 5 to 20 mass parts per 100 mass parts of a rubber component.