Pro Flex 856 18" - restored

That measurement is 20".

Bear in mind though that the kick up in the top tube towards the seat tube means that it's more like an 18" on a normal rigid frame.
 
Re:

Lovely bike. My wife would kill me if I bought it, though. You could take her from me as a straight swap. She's got to be worth a few hundred quid, at least.
 
Back
Top