It's not 700cc, it's 700C, but I forget what it means. I mean, the 700 is the approximate diameter of the wheel and tire in millimeters (it will vary quite a bit depending on tire size), but I forget what the C stands for...something to do with the rim shape. Or else "clincher," which is the type tire you use with an inner tube, as opposed to a tubular. The 622 is the diameter of the rim alone, also in millimeters, and most tires will be marked 622 on the sidewalls somewhere.