Originally Posted by Aeroplane
http://www.suginoltd.co.jp/track_e.html
Sugino says it's ISO, but just about everybody else says that it's JIS. I'm hoping it's a language barrier thing, because I dream of having 75's on a UN-73.
Right, this is a frequently disputed issue. I say just spring for the $75 sugino 75 BB and call it a day.