A device for supporting the wheels of vehicles in general during their attitude check, comprising a horizontal plate (8) which is supported in such a manner as to enable it to undergo rotation and translation within the plane in which it lies, about a position known as the zero position, and means able to disable the mobility of said plate, said means comprising a lower central appendix (11) which is rigid with the plate, and with which there is associated an automatic centering, retention and release system, which is activated and deactivated by a remote command.