How can it test as XX stiff when there is no industry standard for how each shaft is measured to determine flex.  From Tom Wishon. Shaft Myth #3 – The letter flex code on the shaft tells me how stiff the shaft is No it doesn’t because there are absolutely no standards in the golf industry for how stiff any of the shaft flex codes are. Every golf company and shaft company is free to determine how stiff their various shaft flex letter codes are to be. As a result it is very common f