The Belsaw 8" wheels are kinda spendy, but when mine wore out, I fashioned a little bushing to adapt 7-1/4" steel-cutting abrasive circular saw blades. Slightly coarser grit, but otherwise very satisfactory for many tasks. If you're grinding sawblades on it, or chainsaw chain, you need the factory wheels, because you can shape the edge to your desired tooth contour. General grinding, not so much.
Parker