Full automatic rire changer is suitable for handling 10"-22"wheels and capable of handling 20"aluminum alloy rims without using special attached device.also it is capable of handling extra-wide tire. Aid arm installation is optional. *Vertical and horizontal arms with pneumatic dual *loching device *pole is titable *self-centering device *slide with step function *tool box under the pole *tubless in flating device -complete with air reserve tank -inflating nozzles for tubeless inflating from the slides -frontispiece inflating control pedal -manometer for inflating pressure control equipped withdeflating push button