Machine for fitting and removing wheel tires for vehicles

Machine for fitting and removing wheel tires for vehicles, comprising a bearing structure, at least an apparatus for fastening and rotating the rim of a wheel for vehicles, at least a tool-carrier unit associated mobile with said bearing structure and having at least a removal tool, at least an adjustment apparatus suitable for adjusting the position of said tool-carrier unit with respect to said bearing structure, to place said tool-carrier unit into at least a work configuration wherein said removal tool is arranged in proximity of said apparatus for fastening and rotating, at least a memorization device for memorizing the position of said tool-carrier unit in said work configuration and at least a positioning device for positioning said tool-carrier unit with respect to said bearing structure between said work configuration and at least a configuration of minimum overall dimensions, wherein said tool-carrier unit is arranged in proximity of said bearing structure, wherein said memorization device comprises at least a locking/release device of said adjustment apparatus, suitable for locking said adjustment apparatus when said tool-carrier unit is in said work configuration, limiting the movement of said tool-carrier unit between said work configuration and said configuration of minimum overall dimensions, and suitable for releasing said adjustment apparatus to position said tool-carrier unit in a different work configuration, and wherein said adjustment apparatus comprise at least an articulated quadrilateral mechanism associated with said bearing structure and with said tool-carrier unit.