Originally Posted by
oeuf
I've seen these before, but not the couplings.
Can you have that custom installed on any bike or is it specific to certain models?
Do you own that Surly? How's it feel when you ride?
I'll have to pretend you really don't know what a Raleigh / Phillip's Twenty is...
It's a vintage folder (1973) with a fixed gear conversion but any modern folder could also be converted... the 20 is a bike for the boot / trunk and not much of a suitcase sized bike.
The Twenty is a pretty sweet ride (in any form)... it's smooth, fast, and very comfortable.