I picked up five 6.70-15, Atlas Silent Grip, 4ply, tubeless, tires today. They are new, never mounted, but I don't know how old they are. The guy I bought them from had them stored in heavy black plastic bags that he said they were in when he bought them three years ago from a guy that got them in a bunch of parts from a Chevy dealership that closed and has no history on them. They look great and feel like a new tire should. Were these tires reproduced? If not, anyone know when they were last produced? Does anyone know of a tire size comparison chart for bias ply tires? I would like to replace my 600-16 tires with these. How wide of a 15" wheel will work? Do you think 6" wheels would be too wide for these tires? I had planned to switch to radials, based on price of repop bias tires until these turned up. Thanks for any answers..............Tim