Tilt-back column design quickly moves away from the wheel assembly when not in use. hunter tire changer heavyweight chassis.A tire changer is a machine used to help tire technicians dismount and mount tires with automobile wheels. After the wheel and tire assembly are removed from the automobile, the tire changer has all the components necessary to remove and replace the tire from the wheel.On a semi-automatic tyre changer, the head and locking plate is bolted and the handle mounted at the front/side of the column by the swing arm. In comparison, on a fully automatic tyre machine the whole rear column operates through pneumatics, using compressed air to manoeuvre the mounting head and locking it in place.TPMS stands for tyre pressure monitoring system, it consists of small electric sensors fitted to each wheel of the vehicle to monitor tyre pressure and feed this data back to the car. Should one or more tyre see a change in air pressure, the system will show a yellow warning light on the dashboard to alert the driver.