IRD QB-55 Quad bottom bracket

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. Specifications • made in Japan • 68mm English threaded (1.370" x 24tpi) • JIS square taper • spindle lengths: 103, 107, 110mm • crank arm bolts not included • use Park Tool BBT-22 for installation & removal • weight: 255g (110mm)