Chain for this bike is definitely the Ewart detachable link chain that has a slightly longer pitch than the 1" pitch block chain that I sell. I have a CNC machine shop that can re cut the pitch to match my available 1" pitch block chain and I have done this on a couple of chain ring sprockets so meshing will be perfect. If you are a purist and don't want to actually use the bicycle, the Ewart chain would be correct but is very difficult to find.
You don't have to worry about re cutting the rear wheel hub sprocket as there are not enough chain blocks in contact with the fewer number of teeth to cause a build up of tolerance spacing differences between the Ewart chain cut pitch and my 1" pitch block chain and it works just fine.
Mike Cates, CA.
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