SHIMANO BB-7700 Octa-link Italian Bottom Bracket

This is the bottom bracket you need when using Dura Ace 7710 track crank arms on an Italian track frame having a 70mm shell with right-hand threading on both sides.

• 70mm Italian threaded (1.370" x 24 tpi - both cups right-side thread)

• spindle: 109.5mm Octalink

• sealed cartridge bearings

• crank arm bolts & dust caps sold separately

• requires Park Tool BBT-22 & any track lockring tool for installation & removal

• weight: 173g