Hello! Brand new forum member here. I started a project recently to convert my 90's Fuji ATB to a single speed. I have found a tremendous amount of info on the Internet but one sticking point is my crank chainring. I have a spider that looks too small to bolt up most of the chainrings available. I have attached a photo of the bike and a close up of the crank. Would I be better off replacing the whole crankset? If I do, will I need a different BB? I would appreciate any help I can get. Thanks in advance!