The vehicle, that comprises at least three supports such as, for example, wheels, two of which (20, 21) are situated at the front and one (3) at the back, which allows the vehicle to change direction, has a support polygon, both the length and the width of which can be varied, in order to switch from a so-called fast movement configuration to a so-called storage configuration in which it is both shorter and narrower. The front lateral supports lower when they move away from the longitudinal median plane of the vehicle. The rear support lowers relative to the chassis, moving towards the front supports. The front part of the vehicle therefore lowers into the storage position in order to facilitate access to same at the front. This variable geometry gives the vehicle good longitudinal, lateral and directional stability in the fast movement configuration while giving it a very small footprint at low speeds or when stationary. It may be a car or a wheelchair for an individual with reduced mobility, or indeed a bicycle, moped, snowmobile, amphibious vehicle or boat. The driving force of the vehicle can be provided either by the muscle power of the user or a third party, or indeed by one or more preferably electric motors.Le véhicule, qui comporte au moins trois sustentateurs comme par exemple des roues, dont deux (20, 21) sont situés à lavant et un (3) à larrière qui permet au véhicule de changer de direction, a un polygone de sustentation dont on peut faire varier à la fois la longueur et la largeur, pour passer dune configuration dite de déplacement rapide à une configuration dite de rangement dans laquelle il est à la fois plus court et plus étroit. Les sustentateurs latéraux avant sabaissent lorsquils sécartent du plan longitudinal médian du véhicule. Le sustentateur arrière sabaisse par rapport au châssis pour se rapprocher des sustentateurs avant. La partie avant du véhicule sabaisse donc en position de rangement pour faciliter son accès par lavant. Cette géométrie
