Shimano BB-5500 105 Splined Octalink Bottom Bracket – English 68 x 118mm

increases strength and rigidity, Oversize BB spindle – large 22 mm diameter chrome-moly hollow pipe billet spindle reduces weight

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