650 x 47 clearance is equiv to the obsolete "road bike" tyre size of 700 x 28, both are too small for modern usage.
Both are what I'm riding right now. LOLz
I guess I will have to consider my usage "retro" and I'll make a fortune when it's "vintage".
@Belagerent started
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650 x 47 clearance is equiv to the obsolete "road bike" tyre size of 700 x 28, both are too small for modern usage.