IRD QB-75 JIS Square Taper Bottom Bracket

All the squares out now are mostly cheap stuff you wouldn't dream of using on your 1995 Dura-Ace crank or your new Sugino cranks. IRD to the rescue. English (68mm) shell, 1.37x24tpi. Made with Japanese quality by Tange Seiki. In sizes down to 103mm.

QB-75 has aluminum cups and is lighter than the QB-55.