TIRE

The tire is a tire having a smooth pattern with substantially no grooves on a tread surface of a tread portion including tread rubber , wherein on a side portion outer surface of the tire , a plurality of ridges protruding from the side portion outer surface and extending in the tire circumferential direction, to check a remaining tread gauge to the tread rubber reaches its wear limit, are provided spaced apart from each other in the tire radial direction.