Originally Posted by
fietsbob
Shimano Caprio is their small wheel cassette. a 9-26t .
but the hub accepts just that cassette and Visa versa
+1. I was just about to mention this. Not cheap (~300 for built wheel and cassette), But a 20" wheel with a 9T cog is equivalent to a 26.6" wheel (which doesn't exist) with a 12T cog.