Hey all. I'm building a single speed roadster for my wife and I have an old Bendix mexico 86 hub for it. I also have a bendix 19t cog. I went to put the chain on and it would not engage the cog teeth. I measured the teeth with my caliper and they were 3mm @ their widest. This makes me think it would take a 1/2 inch track chain. Is this right for a coaster hub? Any ideas?