A device for mounting and dismounting tyres

The device includes a special tool for extracting an upper bead of a tyre; the tool is of such a shape and is activated in such a way as to automate the tyre dismounting operation reliably and safely. The device comprises other tools, used in the lower bead extraction operation and in the mounting of a tyre, which tools are operated using compressed-air actuators which operate tool-bearing arms according to preset trajectories and runs.