TIRE

Provided is a tire capable of improving steering stability on a dry road surface and on-snow performance. A tire 1 includes a buttress surface 13 extending inward in a tire radial direction from a tread ground-contact end Te. The tire 1 has a plurality of line grooves 15 recessed inward from the buttress surface 13 and extending on the buttress surface 13 and a plurality of ridges 16 protruding outward from the buttress surface 13 and extending on the buttress surface 13. The line grooves 15 and the ridges 16 are alternately arranged.