I wasn't sure what other 700 wheels there were. I'm fairly limited to knowing about 700C, 650C and 650B, and the 27.5 and 29" equivalents. And whatever version of 26" are on older MTBs. It's very interesting when, in referring to a 650B tire, like on a gravel bike, they might write the tire size with a C. "I got some 650B wheels for my gravel bike and I'm rocking some 48C tires."