If we're to classify bikes lets not forget pass hunters:
http://velo-orange.blogspot.com/
As for randonneurs, Jan Heine had a good description. Something along the lines of: a bike built for long distance riding that, because it carries little weight, can be built like a racing bike. Perhaps he'll chime in.
Chris
http://velo-orange.blogspot.com/
Okay - I know I am re-inventing the wheel, but I'm hoping the resulting discussion will be productive by increasing the accuracy of what we call different types of road frames. No flaming required, this is the beginning of a discussion.
Some old racing frames look more like newer sport touring frame, which makes classification difficult. I am thinking in terms of how I would use these older frames now, for my current riding on better pavement than they were designed for. I'm also more interested in the more utilitarian road frames than the specialized racing frames.
Track racing frames (steep, high, short, horizontal rear facing dropouts) Time trial frames (?) Cyclo-cross frames (?)
Criterium racing frames (75 plus head angle, high bottom bracket, very short wheelbase <98) bare clearance for sewups.
Road Racing frames (73 or 74 head angles, moderate height bottom bracket, 99-100cm) sewups/700c <25mm)
Sport frames (usually called sport touring) (73 head angle, moderate height bb, 101-102cm) clearance for at least 700x28mm tires not designed for loads in racks good frame for club riding or centuries
All rounder (usually called sport touring) ( 72 or 73 head angle, moderate height bb, 102-104cm, clearance for fenders with 45-55mm brake reach, longer chainstays, clearance for 700x32mm or 27x1 1/4)
I have seen Randonneur frames described, but I am unfamiliar with them.
Loaded touring frames (72 head angles, lower BB, 104-107cm, very long chainstays, clearance for fenders, cantilever or disc brakes, brazeons for racks, etc. 700 or 27 clearance for tires up to 42mm)
Hybrid frames (road geometry with 26 inch wheels, cantilevers, and huge tire clearance) these might overlap all rounders, or loaded touring.
Chris Kulczycki
Velo Orange
109 Colonial Avenue
Annapolis, MD 21401