A safety tire in combination with a rim includes an outer tube; a reinforcing layer secured to the outer tube; and a plurality of partitions for dividing a space formed by the reinforcing layer, the outer tube, and the rim into a plurality of compartments. Each compartment is implemented as an inner tube unit and includes a cavity in a first end, the cavity having a first magnetic element on a bottom, and a protuberance on a second end, the protuberance having a second magnetic element on an open end, the protuberance being releasably fastened in the cavity of an adjacent compartment by attaching the second magnetic element to the first magnetic element of the adjacent compartment. Each partition includes a central tunnel put on the protuberance, and corrugations adjacent to the central tunnel.