Hofmann Balancing Techniques of Belleville, Ont., is offering the Monty 3800 and 4200 heavy-duty truck, tractor, and bus tire changers. The products automatically change a truck’s tires, eliminating heavy lifting. The tool head carriage is positioned electronically by touching a toggle lever on the mobile console and can be set to all types of wheels. A patented bead breaker and mounting/demounting head are combined in one tool, eliminating the need for replacement tools. A hydraulic chuck clamps wheels without adapters or extensions and prevents the jaws from opening if pressure decreases or is unintentionally released by the operator.