Grab two 3/16" Allen wrenches. Insert one in each screw on the sides of the wheel. Hold one screw in place while turning the other in a counter-clockwise direction, loosening the screw.

Once both screws are removed the wheel should be free and fall out.

One of the screws fits inside the other. The inner screw should be 5.6 mm in length. During reassembly, the screws can be put back in on either side.

During reassembly, do not over-tighten the screws, as you could strip them. They should be just tight enough to prevent the wheel from wobbling.