Tange-Seiki 109mm ISO cartridge bottom bracket
Tange-Seiki has been making quality headsets and bottom brackets in Japan since before your parents were born and this is no exception.
Perfectly compatible with Sugino 75, Dura Ace 7600 and other square taper track cranks requiring a 109mm ISO spindle (regardless of the jibber-jabber you've read on the interwebs).
• 109mm ISO symmetrical spindle
• 68mm English-threaded (1.370" x 24 tpi)
• crank arm bolts are not included
• requires Park Tool BBT-22 for installation & removal