The nice thing about dialect is that when you find it, it's everywhere. High flange, which sounds as if it should be in the Dictionary of American Slang, was a universal term stateside, and blest in print as well, as catalogues and bike mags will attest during the 1969 - 1972 period when I was an active mech. The term was used by our Brit bike retailers, Sugden and Lynch, said to be transplants but still very much a part of a UK tribe of bike merchants, but then that may have been out of necessity to communicate with the natives in Menlo Park, CA. With the term came equally accepted practices for wheelbuilding: HF for racing, 2X and 3X, presumably rigid, strong and responsive; LF for touring, 3X and 4X, exceptionally strong with a far more supple ride. Cinelli bi-valent hubs are an example of that LF expectation. Colloquialisms morph over the decades.
Harrison Lee Stockton, where it's a balmy +13 degrees C., CA