Originally Posted by
The Golden Boy
The dominance of 700C is a relatively recent thing.
This.
When I started riding again in 2008 after 20+ years away from cycling, I had never even heard of 700C tire sizes. If you scoured my early BF posts you'll probably find a few from me asking what the heck a 700 tire is and how it compares with 27". To make it more confusing for me, I also acquired an old Raleigh DL-1 around that time that has 700B tires (aka 28 x 1-1/2).
See also.