Originally Posted by
highwayzero
I believe 18"...now that I know (thanks to all the replies) what I'm on the hunt for, I may keep a lookout for a vintage aluminum unit. It's really more for looks...
Do you have at least 18-1/2 clearance? I have a Ventolux my buddy just gave me with a box of parts from his 70s Peugeot. Its 19-1/4 uncompressed, and will compress down to 18-1/2 with the hose installed and about 18-1/4 with the hose removed.