Sugino CBBF-103 bottom bracket
Sealed-cartridge BB designed specifically for use with Sugino RD Messenger and RD2 cranksets.
• 68mm English threaded (1.370" x 24tpi)
• spindle length: 103mm
• steel cups & center sleeve
• JIS square-taper
• crank arm bolts not included
• requires Park Tool BBT-22 for installation & removal