This invention discloses a method and a device to check the pressure drop of vehicle tyre by modifying the elastic deformation of a certain section of the tyre. When the pressure inside the tyre is normal and the elastic deformations of different sections of a tyre are identical, it shows there's no abnormal phenomenon during driving; when the prossure drops to an unqualified degree, the elastic deformations of the different sections of a tyre will appear an inconsistancy, and the vehicles will go through periodic vibration in driving, which may indicate the degree of prossure drop inside the tyre. The arrangement is to place an elastic body at some place of the tyre or to put a metal plate inside the outer tyre, or to increase the thickness of a certain section of the tyre. |