To distribute and reduce the stress in a tread ring during usage through the length and width by providing numerous recesses or projections in the entire outer peripheral surface of a tire body and providing recesses and projections corresponding to those in the tire body in the entire inner circumferential surface of the tread ring.

This tire has such structure as preventing a tread ring from deforming in such a way that the tread rings 2, which are fixed in a tire body 1 and outer peripheral surface of the tire body 1, are fixed due to the fitting of the projections 3 and recesses 4, which are fitted to each other. The tread ring 2 can be detached from the tire body 1 by reducing the air pressure in the tire body 1 so that the outer diameter of the tire body 1 becomes smaller than the inner diameter of the tread ring 2 including the projections 4 in the inner surface of the tread ring 2.