The invention relates to a device for inserting inside tires of a vehicle so that it follows its course without stopping after a bursting. The device comprises a cluster of flexible bladders (1) which are made of rubber, have a diameter of one to several inches according to the use, are interconnected by a cord (2.1) with its distribution branches (2.2, 2.3) and an inflating stem (3). The air enters each bladder via the cord by means of a very sensitive mini-check valve (9). During inflation, the air contained inside the space of the tire is purged via a purging system (6, 7, 8). In one variant, the principle of the valves, cord and purge is retained, but there are fewer bladders and they have the shape of sections of the tire. Bladders that are resistant to depression can also be used with the same valves and purge but without a cord. The refilling ensues by an over inflation step followed by a reduction effected by the purge until the operating pressure is reached. Finally, one or several rings of multiple or single chambers can be used that are inflated to a pressure greater than the tire and mounted inside around the wheel.