The other pictures at the website makes the wheel look like it lifts and lowers the grill from the fire.
http://www.grillsandcookers.com/1000-original-grill.php
Thought the same thing, but this is a Smoker; the firebox is that box on the left hand side.
Unless, this is a high-end BBQ that can use both direct heat with a fire pit and/or the slow smoky goodness of Southern BBQ with a firebox on the left far corner.
Either way, I wants one. And you can even put Chinese wheels on it.
I just found the pics; didn’t go thru it far enough first time. Thanks, DY.