Rinko is a Japanese thing Jan Heine got the subscribers of his VBQ magazine emulating.
(and buying parts, imported , from his Compass Cycles company in Seattle.)
...to use the train to get your non folding bike, out for a ride in the countryside ,
it has to go in a bag, both wheels off, and compact as possible ,
so Rinko-ing is about getting tour 700c bike to pretend it's a small package.
Full mudguards that come off easily is part of the overall scheme..
...