Seam allowance structure, tire and attaching method

The invention provides a seam allowance structure, a tire and a fitting method. The seam allowance structure is used for being arranged between a tire side and a lining layer of the tire, the seam allowance structure comprises a first fitting part, a second fitting part and a third fitting part, and the first fitting part is fitted with the tire side; the second fitting part is connected with the first fitting part; the second fitting part comprises a second fitting face used for being attached to the lining layer, the second fitting part is provided with a first pressing face and a second pressing face which are opposite to the second attaching face, and the second pressing face is arranged at the end, away from the first attaching part, of the first pressing face. The seam allowance structure provided by the invention solves the problem that the edge of the seam allowance is easy to warp when the tire is manufactured in the prior art. 本发明提供了一种子口结构、轮胎及贴合方法，子口结构用于设置在轮胎的胎侧和内衬层之间，子口结构包括：第一贴合部，第一贴合部与胎侧贴合；第二贴合部，第