Shimano Dura-Ace Bottom Bracket BB7700.

Precision engineered Dura-Ace 7700 bottom bracket for road Octalink splined system.

Key Features:

• 22 mm diameter chrome-moly hollow pipe billet axle reduces weight
• Splined interface gives a more rigid crank assembly compared to tapered counterparts
• 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
• Average weight 173 g