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
