Non-pneumatic tire

A non-pneumatic tire, comprising a tread and an inner ring with a common circle center, and a plurality of groups of bulges radially and integrally connected between the tread and the inner ring with the center of the tread and the inner ring as a center, wherein the plurality of groups of bulges are radially distributed between the tread and the inner ring, each group of bulges is hollowed out inside, and adjacent groups of bulges are integrally connected to form an annular cavity which runs through the plurality of groups of bulges and surrounds between the tread and the inner ring;

• a depression is formed at a connection position of the adjacent groups of bulges, the depressions form a tightening inner brim corresponding to an inner wall of the annular cavity, a top contour of an inner wall of each group of bulges correspondingly forms an expanding outer brim of the annular cavity, and a bulge wall of each group of bulges forms an arc-shaped extension surface integrally connected between the tightening inner brim and the expanding outer brim;
• and a tire wall connected between the tread and the inner ring is formed between the tightening inner brims of the annular cavities and the tops of the outer walls of the bulges, which tire wall comprises an outer side tire wall connected between the tread and an outer side rim of the inner ring and an inner side tire wall connected between the tread and an inner side rim of the inner ring.