It turns if any element other than a solid or semi-solid is touching one of its sides, unless the side that it's touching is exactly on the top or bottom or is spread equally, balancing out. It also turns with the wind.
It moves any elements (other than fan) that are within its radius, but cannot be moved by any object.
It cannot be destroyed in any way other than with erase, or load/reset.
It is the only object in Powder Game whose contact area can be on the same space as block without the use of a glitch.
The maximum number of wheels that can exist on a screen at any given time is 100.
Due to the displacement property of wheel, it is possible to transfer an element through a block wall. Some elements need additional help (with drag or wind) to spin fast enough to accomplish this. Here is an example with water:
A row of several wheels blown by fan can create the illusion of a drill, or if rotated at the same time, at the same speed (achievable by placing a chamber filled with a non-solid element by the wheels), it creates the illusion of a three-dimensional object.