Shimano BB-5500 105 Octalink bottom bracket 68 - 109mm

Splined bottom bracket designed for use with Shimano road Octalink crankset
Oversize BB spindle - large 22 mm diameter chrome-moly hollow pipe billet spindle reduces weight, increases strength and rigidity
Octalink splined axle/crank arm interface - results in a more rigid crank assembly compared to square tapered spindle
Maintenance-free sealed cartridge design prevents corrosion and is easy to install
Aluminium adapter
Average weight 250 g