IRD QB-55 Quad bottom bracket
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This JIS square-taper bottom bracket features Japanese Tange-Seiki sealed cartridge bearings bearings, a hardened cro-mo spindle, an aluminum center sleeve and steel cups.
🔧 Pro tip: The crankset being used determines spindle length, not the frame. Please check what length the manufacturer recommends for your crankset or measure your existing BB's spindle.
• made in Japan
• 68mm English threaded (1.370" x 24tpi)
• JIS square taper
• spindle lengths: 103, 107, 110mm
• use Park Tool BBT-22 for installation & removal
• weight: 255g (110mm)