Shimano
Dura Ace 7700 Octalink Bottom Bracket

• Large 22mm diameter hollow pipe billet axle reduces weight
• Splined ends provide a more rigid non-loosening crank assembly
• 109mm fits double 7700 and 7701 road cranksets plus 7710 track/ single speed crankset
• Compound bearing structure - ball and needle bearings support the spindle to reduce flex
• Maintenance-free sealed cartridge design prevents corrosion and is easy to install
• Weight - 173g