Shimano 105 BB5500 68 - 118 MM Silver / Black 68 - 118 MM EBB5500B18

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