KilroyCD
Active Member
Center tube? do you mean top tube, or downtube? Most of the "cruisers" I see on this forum have both curved top, and down tubes.
Most cruisers do have the curved top tube and down tubes. Some older designs, like my '46 Columbia have yet another tube, and for lack of the technical term I have been calling it a center tube. This is a horizontal tube running from the seat tube to the down tube, a few inches below the top tube. See what I'm talking about in this photo:
http://i191.photobucket.com/albums/z21/KilroyCD/My Bikes/Columbia701a.jpg